BMW Vehicle Models 428i 2014-2016 Torque Specifications
BMW Vehicle Models 428i 2014-2016

BMW Vehicle Models 428i 2014-2016 Torque Specifications

Complete BMW Vehicle Models 428i 2014-2016 torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

Updated

Important Information

Safety guidelines and reference information for proper torque application

Quick Reference Guide
ft-lbs → Nm
× 1.356
ft-lbs → kg-m
× 0.138
Nm → ft-lbs
× 0.738
in-lbs → ft-lbs
× 0.083

Common Torque Patterns

Star Pattern

Used for wheels and other circular bolt patterns

Star Pattern torque pattern diagram showing proper bolt tightening sequence
Cross Pattern

Used for gaskets and cover plates

Cross Pattern torque pattern diagram showing proper bolt tightening sequence
Sequential Pattern

Used for head bolts and other critical components

Sequential Pattern torque pattern diagram showing proper bolt tightening sequence

Common Mistakes to Avoid

Over-tightening

Exceeding the specified torque value can stretch or break fasteners, damage threads, or crack components.

Prevention:

Always use a calibrated torque wrench and follow specifications exactly.

Incorrect Torque Sequence

Tightening bolts in the wrong order can cause uneven pressure distribution and potential leaks or damage.

Prevention:

Follow the manufacturer's specified torque sequence pattern.

Dirty Threads

Dirt, rust, or old thread locker can affect torque readings and proper fastener tension.

Prevention:

Clean and inspect all threads before assembly. Use new thread locker if specified.

Reusing TTY Bolts

Torque-to-yield bolts are designed to stretch and must not be reused.

Prevention:

Always replace TTY bolts with new ones. They are single-use only.

Dry vs. Lubricated

Not accounting for whether torque specs are for dry or lubricated fasteners can lead to incorrect tension.

Prevention:

Check if specs are for dry or lubricated threads. Use specified lubricant when required.

Recommended Tools

Torque Wrench (1/4" Drive)

Range: 2-25 ft-lbs
Small fasteners, delicate components

Torque Wrench (3/8" Drive)

Range: 10-100 ft-lbs
Most common automotive fasteners

Torque Wrench (1/2" Drive)

Range: 30-250 ft-lbs
Large fasteners, wheels

Angle Gauge

Torque-to-yield (TTY) bolts

Torque Wrench Care

  • Calibrate annually or after 5,000 clicks
  • Store at lowest setting
  • Keep clean and lubricated

Search Specifications

Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l Engine

Torque specifications for 2.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.75
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts in specified sequence. Final tightening may require an angle step (not specified in given source, use with caution)

Engine Block

1

Main Bearing Bolts

M10 x 1.5
Torque Specification
77 ft-lbs (105 N·m)
Important Notes
Tighten bolts in specified sequence to ensure even clamping force.
2

Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent leaks. Recommended to use a new gasket.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Specification
77 ft-lbs (105 N·m)
Important Notes
Proper torque is critical for vibration damping and accessory drive.
4

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Proper torque ensures sensor sensitivity. Estimated value based on typical knock sensor bolt size.

Connecting Rods

1

Connecting Rod Nuts

M9 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper torque to prevent bearing and rod failure.

Flywheel

1

Flywheel Bolts

M10 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Use new bolts if specified by service manual. Ensure proper alignment with dowel pins if equipped.

Valvetrain

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent oil leaks. Use a new valve cover gasket.
2

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure correct rocker arm alignment. Tighten in a specified sequence (see service manual).
3

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
63 ft-lbs (85 N·m)
Important Notes
Ensure proper camshaft timing.

Timing System

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper timing belt/chain tension.

Induction System

1

Throttle Body Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent air leaks.
2

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts in specified sequence to prevent air leaks. New gasket recommended.

Exhaust System

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts evenly to prevent exhaust leaks. New gasket recommended.
2

EGR Valve Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper sealing to prevent exhaust leaks. New gasket recommended.

Fuel System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent fuel leaks.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper sealing. Do not overtighten.
3

Fuel Injector Rail Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper sealing.

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
23 ft-lbs (30 N·m)
Important Notes
Ensure plugs are properly seated and torqued. Do not overtighten.
2

Ignition Coil Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten. Ensure correct alignment.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent coolant leaks. Use a new gasket.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts evenly to prevent slipping. Ensure proper alignment.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent coolant leaks. Use a new gasket.
4

Coolant Temperature Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper sealing and electrical contact. Estimated value.

Accessory Drive

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper accessory belt tension. Do not overtighten.

Oil System

1

Oil Filter Cap

N/A
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Tighten to hand tight (15-20 ft-lbs) to prevent leaks. Estimated value.
2

Oil Filter Housing Bolt

N/A
Torque Specification
17.5 ft-lbs (23.7 N·m)
Important Notes
Tighten to hand tight (15-20 ft-lbs) to prevent leaks. Estimated value.
3

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Proper torque is necessary to prevent oil leaks and damage to oil pan threads.

Sensor System

1

Crank Position Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure correct alignment. Do not overtighten. Estimated value.
2

Cam Position Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper alignment. Do not overtighten. Estimated value.

8hp Transmission

Torque specifications for 8hp Transmission

Transmission Housing

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Secures the transmission to the vehicle chassis/engine. Ensure proper alignment before tightening.
2

Output Shaft Flange Nut

M22 x 1.5
Torque Specification
150 ft-lbs (203 N·m)
Important Notes
Secures the output shaft flange. Torque values vary based on vehicle model; this is an estimated value. Always verify with vehicle-specific documentation. Must use a tool to hold the shaft.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the oil pan to the transmission housing. Use a criss-cross pattern.

Fluid Plugs

1

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensures a secure seal to prevent fluid leaks. Replace sealing washer or O-ring.

Mechatronic Unit

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Secures the mechatronic unit. Use a gradual cross-tightening pattern. Over-tightening can damage the valve body.

Valve Body

1

Transmission Valve Body Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the valve body assembly to the transmission housing. Use a gradual criss-cross tightening sequence. Over-tightening can lead to valve body damage.

Torque Converter

1

Torque Converter Bolts to Flexplate

M10 x 1.25
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 50 ft-lbs (68 N·m)
Important Notes
Connects the torque converter to the flexplate. Tighten in a star pattern, in two stages. Refer to BMW-specific service documentation for precise values.

Cooler Lines

1

Transmission Cooler Line Fittings

M16 x 1.5
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Connects cooler lines to transmission case. Ensure proper alignment of fittings. Over-tightening can damage seals.

Body

Torque specifications for Body

Wheels And Tires

1

Wheel Lug Nuts

M14 x 1.25
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Tighten in a star pattern to ensure even clamping force. Do not use impact wrench for final tightening.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure straps are correctly positioned before tightening.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten these bolts. Ensure the filler neck is properly seated and sealed.

Body Panels

1

Hood Hinge Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (23 N·m)
Important Notes
Estimated value. Proper alignment is crucial when tightening.
2

Fender Mounting Bolts/Screws (Smaller)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use care not to over tighten, can damage fender or cause misalignment.
3

Fender Mounting Bolts/Screws (Larger)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use care not to over tighten, can damage fender or cause misalignment.
4

Door Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Check door alignment after tightening. Adjust as needed.
5

Door Latch/Striker Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper door alignment and latch engagement. Slight adjustment may be needed.
6

Bumper Cover Mounting Bolts/Screws (Plastic)

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Be careful not to overtighten, as this can damage the bumper cover.
7

Bumper Cover Mounting Bolts/Screws (Metal)

M8 x 1.25
Torque Specification
15 ft-lbs (22 N·m)
Important Notes
Ensure proper bumper alignment and bracket engagement before tightening.
8

Headlight Mounting Bolts/Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Ensure proper headlight alignment.
9

Taillight Mounting Bolts/Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Ensure proper taillight alignment.
10

Trunk/Boot Lid Hinge Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Check lid alignment after tightening.
11

Trunk/Boot Lid Latch/Striker Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper trunk alignment and latch engagement.

Interior Components

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (44 N·m)
Important Notes
Important safety bolts. Ensure proper engagement and correct torque.
2

Dashboard Mounting Bolts/Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Ensure proper fit and alignment of panels.
3

Body Control Module (BCM) Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. BCM housings are often fragile.
4

Door Panel Screws/Fasteners

M4 x 0.7
Torque Specification
2 ft-lbs (3 N·m)
Important Notes
Do not overtighten. These are often plastic and/or have clips.
5

Interior Trim Panels (A/B/C Pillar) Screws/Fasteners

M4 x 0.7
Torque Specification
2 ft-lbs (3 N·m)
Important Notes
Do not overtighten. These panels are often plastic and/or have clips.
6

Rear View Mirror Mounting Screw

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Can damage the windshield if overtightened.
7

Sunroof/Moonroof Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Check for proper seal and operation after tightening.

Exterior Trim

1

Side Skirt/Rocker Panel Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten. Ensure proper alignment and fit.
2

Windshield Washer Fluid Reservoir Bolts/Screws

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure reservoir is securely mounted without excessive force.
3

Radiator Core Support Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Ensure proper alignment of the core support.
4

Grille Mounting Bolts/Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten. Ensure the grille is seated correctly.
5

License Plate Mounting Bolts/Screws

M5 x 0.8
Torque Specification
2 ft-lbs (3 N·m)
Important Notes
Lightly snug only. Do not overtighten.
6

Antenna Mounting Nut

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper seal to prevent water intrusion.
7

Rear Spoiler Mounting Bolts/Screws

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper spoiler alignment and secure mounting.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the caliper directly to the caliper mounting bracket. Ensure proper thread engagement and torque evenly.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the caliper mounting bracket to the steering knuckle or wheel hub assembly. Ensure even torque.

Rotor Attachment

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Secures the brake rotor or drum to the hub. Do not over-torque as these are small bolts and stripping them is easy. Always use a calibrated torque wrench.

Caliper Guide Pins

1

Brake Pad Guide Pin Bolts/Bolts Securing Caliper To Guide Pins

M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the caliper to the guide pins, allowing it to float. Ensure pins are lubricated with proper caliper grease and correct torque.

Hydraulic Connections

1

Brake Caliper Bleeder Screw

M7 x 1
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Bleeder screw, torque to spec to prevent damage and ensure a good seal. Do not over-torque.
2

Brake Line Fitting (to Caliper)

M10 x 1
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Connects the brake lines to the calipers. Do not over or under-torque to avoid leaks.
3

Brake Hose to Hardline Connection

M10 x 1
Torque Specification
14 ft-lbs (19 N·m)
Important Notes
Connection between flexible brake hose and hardline. Ensure a proper seal to prevent leaks.

Abs Components

1

Wheel Speed Sensor Bolt

M6 x 1
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the wheel speed sensor to the knuckle. Do not overtighten; damage to the sensor housing may occur.

Drivetrain

Torque specifications for Drivetrain

Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Ensure proper torque sequence to prevent uneven clamping.

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Tighten bolts evenly to ensure proper mounting.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even sealing. May require new gasket.

Transmission Plugs

1

Transmission Drain and Fill Plugs

M22 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new sealing washers or o-rings. Do not over-tighten.

Drive Axles

1

Drive Axle/Half Shaft Bolts (Transmission Side)

M10 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper alignment of the axle during installation.
2

CV Joint/Axle Nut (Wheel Hub Side)

M24 x 1.5
Torque Specification
184 ft-lbs (250 N·m)
Important Notes
Always use a new nut, and make certain it is torqued correctly.

Propeller Shaft

1

Propeller/Drive Shaft Bolts (Transmission and Differential)

M10 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper alignment before tightening.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure differential is properly aligned and supported prior to tightening bolts. These torque values are estimated, and should be confirmed against the specific service manual for your model.
2

Differential Drain/Fill Plug

M22 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Use new sealing washers or o-rings. Do not over-tighten.

Flex Disc

1

Flex Disc Bolts

M10 x 1.5
Torque Specification
60 ft-lbs (80 N·m)
Important Notes
Use new bolts when replacing flex discs. These torque values are estimated, and should be confirmed against the specific service manual for your model.

Center Support Bearing

1

Center Support Bearing Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the bearing before tightening. These torque values are estimated, and should be confirmed against the specific service manual for your model.

Transfer Case

1

Transfer Case Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These torque values are estimated, and should be confirmed against the specific service manual for your model.
2

Transfer Case Output Flange Bolts

M10 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper alignment of the flange before tightening. These torque values are estimated, and should be confirmed against the specific service manual for your model.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper seating of the coil before tightening. Over-tightening may damage the coil or mounting point.

Starting System

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
These bolts secure the starter to the engine block or transmission bell housing. Ensure proper alignment before tightening.

Charging System

1

Alternator Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the alternator to the engine. Ensure the alternator is properly aligned to avoid belt misalignment.

Battery System

1

Battery Terminal Nuts

M6 x 1.0
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten to prevent damage to the battery posts. Ensure proper terminal contact.

Engine Management

1

Engine Control Unit (ECU) Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the ECU is seated properly before tightening. Over-tightening may damage the ECU housing.

Grounding System

1

Ground Strap/Cable Mounting Bolts (Engine/Chassis/Body)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the ground strap or cable is clean and makes good contact. Torque may vary depending on location/size, use 18-25 ft-lbs as a range.

Power Distribution

1

Fuse Box/Power Distribution Box Mounting Bolts/Nuts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These fasteners secure the fuse box or distribution box to the vehicle. Over-tightening may damage the plastic housing. Ensure proper grounding contact.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts in a criss-cross pattern to ensure even clamping pressure. Use new gaskets.
2

Exhaust Pipe to Exhaust Manifold/Header Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure mating surfaces are clean and free of debris. Use new gaskets.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure mating surfaces are clean and free of debris. Use new gaskets.
4

Oxygen Sensor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the sensor is properly seated before tightening. Do not overtighten.
5

Nitrous Oxide (NOx) Sensor Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure sensor is properly aligned and seated. Do not overtighten.

Intake System

1

Mass Air Flow (MAF) Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten; MAF sensors are usually made of plastic and can be damaged easily. Estimated value.
2

Intake Air Temperature (IAT) Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten; the sensor may be plastic and can be damaged. Estimated value.

Fuel System

1

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper seal. Estimated value

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper gasket alignment and clean mating surfaces before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper alignment of the manifold before tightening. Torque bolts in a criss-cross pattern to ensure even clamping pressure.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure a new gasket is used for proper sealing. Torque bolts evenly to avoid leaks.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Use a new gasket if required. Torque evenly to prevent leaks.

Muffler

1

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the muffler is properly aligned before tightening. Torque evenly.

Exhaust Clamps

1

Exhaust Flange Clamp Bolts/Nuts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Torque value is dependent on the style of clamp. This is an estimated value based on typical clamps. Verify specific clamp specifications if available. Ensure clamp is evenly aligned before tightening.
2

V-Band Clamp Bolt

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
Torque value is highly dependent on the clamp manufacturer. This is an estimated value. Always verify the manufacturer’s specific torque recommendations for the V-band clamp in use. Ensure clamp is evenly aligned before tightening.

Exhaust Hangers

1

Exhaust Hanger Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the hangers are properly aligned and supporting the exhaust system before tightening.

Oxygen Sensors

1

Oxygen Sensor Torque

M18 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Oxygen sensors seal using a crush washer. Torque is critical to avoid damage. Many sensors come pre-lubricated and torqued to the correct spec. It would be best to check the manufacturer's installation guidelines.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper seating of the fuel rail before tightening. Tighten in a crisscross pattern to ensure even pressure.
2

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure injectors are correctly seated in the fuel rail and intake manifold before tightening. Over-tightening can damage the injector body.
3

Fuel Pressure Sensor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Sensor mounting bolts are typically small; be careful not to overtighten. Ensure the sensor is seated correctly with a new O-ring or seal if applicable.

Fuel Lines And Fittings

1

Fuel Line Banjo Bolt

M12 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use new crush washers with banjo bolts. Ensure the fuel line is properly aligned before tightening. This value is an estimate based on common banjo bolt sizes.
2

Fuel Line Connection Bolt

M10 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure that the fuel line is properly seated in the fitting before tightening. This value is an estimate based on common fuel line connection bolt sizes.

Fuel Pump

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten fuel pump mounting bolts evenly to prevent distortion of the pump housing or bracket.
2

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the fuel filter is properly aligned and seated before tightening. Depending on the filter style, this could be a clamp bolt or banjo bolt.
3

In-Tank Fuel Pump Assembly Retaining Ring

N/A
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Tighten the retaining ring evenly to ensure proper sealing between the pump module and the tank. This value is within the common range for these types of retaining rings, and is an estimate.

Fuel Tank

1

Fuel Filler Neck Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the filler neck is correctly aligned before tightening the bolts.
2

Fuel Tank Sending Unit/Level Sensor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten the sensor mounting bolts evenly to prevent damage to the sensor or the tank. Ensure the sensor is seated correctly.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensure the compressor is properly aligned before tightening. Use a criss-cross pattern when tightening bolts.
2

A/C Line Fittings

Varies
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use two wrenches, one on the fitting and one on the line, to avoid twisting the lines when tightening. Ensure o-rings are correctly seated and lubricated with refrigerant oil.

Ac Condenser

1

A/C Condenser Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values, as specific torques may vary. Do not over tighten.

Ac Evaporator

1

A/C Evaporator Housing Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. These bolts are typically low torque fasteners used with plastic housings. Do not over tighten.
2

Expansion Valve Mounting Bolts/Screws

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. Ensure o-rings are correctly seated and lubricated with refrigerant oil. Do not over tighten.

Blower Motor

1

Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. Do not over tighten, especially into plastic housings.

Heater Core

1

Heater Core Inlet/Outlet Pipe Bolts/Screws

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. Ensure o-rings or gaskets are correctly seated and in good condition. Do not over tighten.

Actuators

1

Blend Door Actuator Mounting Screws/Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. Do not over tighten, especially into plastic housings. Ensure actuator operates smoothly after installation.
2

Mode Door Actuator Mounting Screws/Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
These are estimated values. Do not over tighten, especially into plastic housings. Ensure actuator operates smoothly after installation.

Suspension

Torque specifications for Suspension

Front Struts

1

Upper Strut Mounting Bolts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the strut top mount to the vehicle body. Ensure proper alignment before tightening.
2

Lower Strut Mounting Bolts

M12 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Connects the strut to the steering knuckle. Always replace these bolts as they are one-time use stretch bolts.

Front Control Arms

1

Control Arm Bolts (Chassis Side)

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the control arm to the vehicle's subframe. Tighten with suspension at ride height for proper bushing function.
2

Ball Joint Nut

M12 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Secures the ball joint stud to the control arm or knuckle. Ensure the ball joint is properly seated before tightening.

Front Steering

1

Tie Rod End Nut

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the tie rod end to the steering knuckle. Ensure proper alignment before tightening.

Front Sway Bar

1

Sway Bar Link Nut

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the sway bar link to the strut or control arm. Hold the ball joint stud stationary while tightening.
2

Sway Bar Mounting Bracket Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Secures the sway bar brackets to the subframe or chassis. Ensure bracket is properly aligned.

Subframe

1

Subframe Mounting Bolts

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Secures the subframe to the vehicle chassis. Always replace these bolts as they are one-time use stretch bolts.

Wheel Speed Sensors

1

Wheel Speed Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Secures the wheel speed sensor to the hub or knuckle. Do not over-tighten, sensor can be damaged.

Steering Knuckle

1

Steering Knuckle/Hub Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Secures the steering knuckle to the suspension components. Check for stretch bolt replacement requirements.

Rear Suspension

1

Rear Trailing Arm Bolt

M14 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Secures the trailing arm to the chassis or subframe. Always replace these bolts as they are one-time use stretch bolts.
2

Rear Upper Control Arm (Camber Arm) Bolts

M12 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Secures the upper control arm to the chassis and knuckle. Always replace these bolts as they are one-time use stretch bolts.
3

Rear Lower Control Arm Bolts

M12 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Secures the lower control arm to the chassis and knuckle. Always replace these bolts as they are one-time use stretch bolts.
4

Rear Shock Lower Bolt

M12 x 1.5
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
Connects the shock absorber to the knuckle or lower control arm. Always replace these bolts as they are one-time use stretch bolts.
5

Rear Shock Upper Bolt

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Attaches the upper part of the shock absorber to the chassis.

Guide Support

1

Guide Support to Body/Chassis

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Secures the guide support component to the body or chassis. Ensure correct positioning before tightening.

Troubleshooting Guide

Common issues, diagnostic steps, and prevention guidelines

Common Issues

Bolt stretching, stripped threads, uneven torque patterns

Loose Components

Symptoms:
  • Rattling or vibration noises
  • Visible movement in components
  • Uneven panel gaps
Solutions:
  • Clean threads and mounting surfaces
  • Replace damaged fasteners
  • Apply proper torque in sequence
  • Use thread locker if specified

Stripped Fasteners

Symptoms:
  • Unable to achieve proper torque
  • Fastener spins freely
  • Visible thread damage
Solutions:
  • Use thread repair kit if appropriate
  • Install thread insert (HeliCoil)
  • Replace component if threaded hole is damaged
  • Upgrade to higher grade fastener if recommended

Overtightened Components

Symptoms:
  • Cracked or deformed parts
  • Broken fasteners
  • Compressed gaskets or seals
Solutions:
  • Replace damaged components
  • Use new fasteners
  • Follow proper torque sequence
  • Verify correct torque specifications

Diagnostic Steps

Visual inspection, torque verification, thread assessment

1

Visual Inspection

Inspect the affected area for any visible signs of damage or wear

  • Check for cracks or deformation
  • Look for signs of excessive wear
  • Verify proper fastener installation
2

Torque Verification

Verify the torque applied to the fasteners

  • Check the torque wrench calibration
  • Verify the torque specification
  • Compare the applied torque to the specification
3

Thread Assessment

Assess the condition of the threads

  • Check for signs of thread damage
  • Verify the thread type and size
  • Check for proper thread engagement

Prevention Guidelines

Best practices, maintenance tips, tool care

Best Practices

  • Always follow the recommended torque specification
  • Use the correct type and size of fasteners
  • Verify the torque wrench calibration regularly

Maintenance Tips

  • Regularly inspect the affected area for signs of wear or damage
  • Replace damaged or worn-out components promptly
  • Keep the work area clean and organized

Tool Care

  • Regularly clean and maintain the torque wrench
  • Store the torque wrench in a dry and secure location
  • Verify the torque wrench calibration before each use

Frequently Asked Questions

Find answers to common questions about torque specifications

Q1

What IS the recommended torque value for the engine oil drain plug?

25 Nm (18.4 ft-lb)

Q2

What type of torque wrench should be used for critical components like the cylinder head?

A calibrated torque wrench with a digital or dial indicator IS recommended for accurate torque application.

Q3

IS it necessary to re-torque bolts after a certain period or mileage?

For most components, re-torquing IS not required unless specified in the maintenance schedule or after major repairs.

Q4

What are the torque specifications for the spark plug replacement?

15 Nm (11 ft-lb) plus an additional 90-degree turn

Q5

Can I use a generic torque value for all bolts of the same size?

No, torque specifications vary depending on the component and its function. Always refer to the manufacturer's specified torque values.

Q6

What IS the recommended torque range for the lug bolts of the wheel assembly?

140 Nm (103 ft-lb)

Environmental Considerations

Temperature, humidity, and seasonal effects on torque specifications

Temperature Effects

Includes: High Heat, Cold Weather, Thermal Cycling

Temperature can significantly impact torque values and fastener behavior

Cold Weather

Effects:
  • Increased material brittleness
  • Higher torque required due to thread contraction
  • Reduced thread lubricant effectiveness
Recommendations:
  • Allow components to warm to room temperature when possible
  • Consider using winter-grade thread lubricants
  • Check torque values more frequently during winter months

Hot Weather

Effects:
  • Thermal expansion of components
  • Decreased friction in threads
  • Accelerated lubricant breakdown
Recommendations:
  • Check torque when components are at normal operating temperature
  • Use temperature-resistant thread lockers
  • Consider re-torquing after heat cycles

Humidity and Corrosion

Covers: Rust Prevention, Salt Exposure, Moisture Control

Moisture and corrosion can affect fastener integrity and torque values

High Humidity

Effects:
  • Accelerated corrosion formation
  • Reduced friction coefficient
  • Potential thread seizing
Prevention:
  • Use corrosion-resistant fasteners
  • Apply appropriate anti-seize compounds
  • Maintain proper protective coatings

Salt Exposure

Effects:
  • Rapid corrosion development
  • Thread damage
  • Seized fasteners
Prevention:
  • Regular underbody washing
  • Use of sacrificial anodes where appropriate
  • Application of protective coatings

Seasonal Maintenance

Spring, Summer, Fall, and Winter maintenance schedules

Spring

  • Inspect for winter damage
  • Clean and protect exposed fasteners
  • Check torque on critical components

Summer

  • Monitor heat-affected components
  • Check expansion-related loosening
  • Inspect cooling system mounts

Fall

  • Prepare for winter conditions
  • Apply corrosion protection
  • Verify all fasteners are properly torqued

Winter

  • More frequent inspection of critical fasteners
  • Check for salt damage
  • Monitor suspension component torque

Related Resources

Tools, service procedures, and technical bulletins

Recommended Tools

Digital Torque Wrench (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the 428i.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Component Bolt Torque Specifications

Technical procedure detailing torque specifications for various components on the BMW 428i.

  • Refer to the vehicle service manual for specific torque values for each component.
  • Use a digital torque wrench to ensure accurate tightening.
  • Follow proper safety precautions when working on the vehicle.
  • Always double-check torque values before tightening.
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Suspension Bolt Torque Update

2016-03-15

Revised torque specifications for suspension components on BMW 428i models produced between 2014-2016.

2014-2016 428i

Resolution: Refer to the updated technical bulletin for corrected torque values and tightening procedures.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

About the Author

Expert automotive knowledge and experience

Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

© 2025 BMW Specs. All rights reserved.

Privacy Policy Terms of Service