BMW Vehicle Models 650i 2012-2017 Torque Specifications
BMW Vehicle Models 650i 2012-2017

BMW Vehicle Models 650i 2012-2017 Torque Specifications

Complete BMW Vehicle Models 650i 2012-2017 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

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4.4l Engine

Torque specifications for 4.4L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 90° 3. 90°
Important Notes
Cylinder head bolts are torque-to-yield and must be replaced after removal. Torque in a specific sequence starting from the center bolts working outwards, and then again at the angle steps. Use a new, clean, lubricated bolt with engine oil. Estimated angle value. Consult vehicle-specific manual.

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
1. 55 ft-lbs (75 N·m) 2. 60°
Important Notes
Main bearing bolts are torque-to-yield and should be replaced after removal. Torque in the correct sequence. Estimated angle value. Consult vehicle-specific manual.
2

Oil Pan Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque in a criss-cross pattern. Be careful not to overtighten and damage the gasket.
3

Water Pump Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly to prevent leaks.
4

Oil Filter Housing Bolt

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque evenly to prevent leaks.
5

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new washer and torque to prevent oil leaks.
6

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly to prevent coolant leaks. Estimated bolt size.

Rotating Assembly

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
1. 20 ft-lbs (27 N·m) 2. 60°
Important Notes
Connecting rod bolts are torque-to-yield and should be replaced after removal. Torque in the correct sequence. Estimated angle value. Consult vehicle-specific manual.
2

Flywheel Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Apply thread locking compound and torque evenly. These may be torque to yield, consider replacing.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Specification
1. 85 ft-lbs (115 N·m) 2. 90°
Important Notes
This bolt is torque-to-yield and should be replaced after removal. Torque to the specified torque and angle values. Estimated angle value. Consult vehicle-specific manual.

Valve Train

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque in a criss-cross pattern to avoid damaging the gasket.
2

Timing Chain Tensioner Bolt

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque evenly, do not over tighten.
3

Camshaft Sprocket Bolts

M10 x 1.25
Torque Specification
1. 40 ft-lbs (54 N·m) 2. 30°
Important Notes
Torque in a specific sequence. May be torque-to-yield and require replacement after removal. Estimated angle value. Consult vehicle-specific manual.
4

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque evenly.

Intake System

1

Throttle Body Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Do not over tighten and damage the throttle body.
2

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque in a specific sequence starting from the center bolts working outwards. Consult vehicle-specific manual.

Exhaust System

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Torque in a specific sequence. These can loosen due to heat cycles. May need to be retorqued. Consult vehicle-specific manual.
2

Exhaust Manifold/Headers Studs

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque to prevent damage to the threads. Estimated value.

Fuel System

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly to prevent fuel leaks. Estimated bolt size.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly to prevent fuel leaks. Estimated bolt size.

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque to ensure a good seal and proper heat transfer. Do not overtighten.
2

Ignition Coil Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly to prevent vibration. Estimated bolt size.

Sensors

1

Camshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly and do not over tighten.
2

Crankshaft Position Sensor Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly and do not over tighten.
3

Knock Sensor Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Torque evenly. Estimated bolt size.

Cooling System

1

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Torque evenly. Estimated bolt size.

6hp Transmission

Torque specifications for 6hp Transmission

Transmission Mounting

1

Transmission Mounting Bolts (to Chassis/Subframe)

M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper alignment before tightening. Use new bolts if specified by manufacturer.
2

Transmission Adapter/Bellhousing Bolts (to Engine Block)

M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Verify proper alignment of the bellhousing to the engine block before tightening. Use new bolts if specified by manufacturer.

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten bolts in a crisscross pattern. Ensure pan gasket is properly positioned. Do not over tighten.

Transmission Plugs

1

Transmission Drain/Fill Plugs

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer or O-ring. Do not over tighten.

Mechatronic Unit

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Specification
6.66 ft-lbs (9 N·m)
Important Notes
These bolts may be torque-to-yield; replace them when removed. Torque evenly. This is an estimated value.

Valve Body

1

Valve Body Bolts

M6 x 1.0
Torque Specification
6.66 ft-lbs (9 N·m)
Important Notes
These bolts may be torque-to-yield; replace them when removed. Tighten in a crisscross pattern. This is an estimated value.

Output Shaft

1

Output Shaft Flange Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Ensure correct mating of the flange to the shaft. Use new bolts if specified by manufacturer. This is an estimated value.

Oil Cooler Lines

1

Transmission Oil Cooler Line Fittings

Varies
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the correct type and size of fittings. Use a backup wrench to prevent twisting the lines. This is an estimated value. Torque value may vary depending on the fitting type and size.

Body

Torque specifications for Body

Wheels And Tires

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
105 ft-lbs (142 N·m)
Important Notes
Ensure wheel mating surfaces are clean and free of debris. Use a criss-cross pattern when tightening lug nuts.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure fuel tank straps are properly aligned before tightening bolts. Do not overtighten.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the fuel filler neck is correctly aligned to the body panel before tightening bolts. Do not overtighten, as this could damage the filler neck or panel.

Doors

1

Door Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper door alignment before final tightening. Torque values are estimated; verify with the vehicle-specific manual.

Hood

1

Hood Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper hood alignment before final tightening. Torque values are estimated; verify with the vehicle-specific manual.

Body Panels

1

Fender Mounting Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper fender alignment before tightening bolts. Torque values are estimated; verify with the vehicle-specific manual.

Bumpers

1

Bumper Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Torque values are estimated and can vary; verify with the vehicle-specific manual. Use the lower end of the specified range for M8 bolts, higher end for M10.
2

Bumper Mounting Bolts (M10)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque values are estimated and can vary; verify with the vehicle-specific manual. Use the lower end of the specified range for M8 bolts, higher end for M10.

Interior Components

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Ensure proper seat alignment before final tightening. Torque values are estimated; verify with the vehicle-specific manual.
2

Seat Belt Anchor Bolts

M12 x 1.75
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure proper seat belt alignment before final tightening. Torque values are estimated; verify with the vehicle-specific manual. This bolt is crucial for safety; double-check torque.
3

Interior Trim Mounting Screws/Bolts

M4 x 0.7
Torque Specification
4 ft-lbs (5.5 N·m)
Important Notes
Ensure trim pieces are properly aligned before tightening. Do not overtighten, as this could damage the trim or mounting points. Torque values are estimated and vary widely; verify with the vehicle-specific manual.

Rear Hatch Trunk

1

Rear Hatch/Trunk Lid Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper trunk lid alignment before final tightening. Torque values are estimated; verify with the vehicle-specific manual.

Lighting

1

Tail Light Assembly Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not overtighten, as this can damage the light housing. Torque values are estimated and vary widely; verify with the vehicle-specific manual.
2

Headlight Assembly Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not overtighten, as this can damage the light housing. Torque values are estimated and vary widely; verify with the vehicle-specific manual.

Grille

1

Grille Mounting Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not overtighten, as this can damage the grille. Torque values are estimated and vary widely; verify with the vehicle-specific manual.

Brakes

Torque specifications for Brakes

Front Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
These high-grade bolts secure the caliper to the mounting bracket. Always replace these bolts when removed.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
These bolts secure the mounting bracket to the steering knuckle/hub assembly. Proper torque is critical for supporting the braking assembly.
3

Brake Caliper Bleeder Screw

M10 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
This is a small screw used to remove air from the brake lines during bleeding. Over-tightening can damage the screw/caliper. Torque to the lower end of the range if a range is given.
4

Brake Line Fitting at Caliper

M10 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
This fitting connects the brake line to the caliper. Proper torque is essential for a leak-free seal. These often use crush washers and must be torqued to seat properly.
5

Brake Pad Guide Pin/Bolt

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
These guide pins/bolts retain the brake pads. Proper torque ensures the pads do not move during operation.

Rear Brake Caliper

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
These high-grade bolts secure the caliper to the mounting bracket. Always replace these bolts when removed.
2

Brake Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
130 ft-lbs (176 N·m)
Important Notes
These bolts secure the mounting bracket to the steering knuckle/hub assembly. Proper torque is critical for supporting the braking assembly.
3

Brake Caliper Bleeder Screw

M10 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
This is a small screw used to remove air from the brake lines during bleeding. Over-tightening can damage the screw/caliper. Torque to the lower end of the range if a range is given.
4

Brake Line Fitting at Caliper

M10 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
This fitting connects the brake line to the caliper. Proper torque is essential for a leak-free seal. These often use crush washers and must be torqued to seat properly.
5

Brake Pad Guide Pin/Bolt

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
These guide pins/bolts retain the brake pads. Proper torque ensures the pads do not move during operation.

Brake Discs And Drums

1

Brake Disc/Drum Retaining Bolts

M8 x 1.25
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
These bolts/screws secure the brake disc/drum to the hub. While they may not have to withstand a lot of braking force, they are important for ease of assembly and keeping the disc in place.

Brake Lines

1

Brake Line Fitting at Hardline

M10 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
This fitting connects the brake line to the hardline. Proper torque ensures a leak-free seal. These often use crush washers and must be torqued to seat properly.

Master Cylinder

1

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
These bolts secure the master cylinder to the brake booster or firewall. Proper torque is essential for maintaining proper braking force.

Drivetrain

Torque specifications for Drivetrain

Engine Mounting

1

Flywheel Bolts

M12 x 1.5
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Apply threadlocker to bolts. Use a star pattern tightening sequence.
2

Starter Motor Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure correct starter motor alignment. Use a diagonal tightening sequence.

Transmission Housing

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper transmission alignment. Tighten evenly in a cross-pattern.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Use new gasket/seal. Tighten in a cross-pattern.
3

Transmission Output Shaft Flange Nut

M24 x 1.5
Torque Specification
150 ft-lbs (203 N·m)
Important Notes
This nut secures the output flange of the transmission to the driveshaft/propeller shaft flange. Torque value is estimated based on similar size and application.
4

Transmission Fluid Drain/Fill Plugs

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer. Do not overtighten.

Clutch Components

1

Pressure Plate Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten evenly in a star pattern. Ensure proper clutch disc alignment.
2

Clutch Release Mechanism Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Check for proper engagement after install. Tighten evenly.

Driveshaft

1

Propeller/Drive Shaft Bolts

M10 x 1.5
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use new bolts if they are torque-to-yield type. Tighten in a star pattern.
2

Driveshaft Center Support Bearing Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the bearing is properly aligned. Tighten evenly.

Drive Axles

1

Drive Axle/Half Shaft Bolts

M10 x 1.25
Torque Specification
80 ft-lbs (108 N·m)
Important Notes
Apply threadlocker. Ensure correct axle alignment. Tighten in a star pattern.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
200 ft-lbs (271 N·m)
Important Notes
Use a new nut. Ensure correct seating of the CV joint. Use a calibrated torque wrench.

Differential

1

Differential Cover Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new gasket/seal. Tighten evenly in a cross-pattern.
2

Differential Drain/Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new sealing washer. Do not overtighten.
3

Differential Input Flange Nut

M24 x 1.5
Torque Specification
150 ft-lbs (203 N·m)
Important Notes
This nut secures the differential to the driveshaft/propeller shaft. Torque value estimated based on similar size and application.

Transfer Case

1

Transfer Case Drain/Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use a new sealing washer. Do not overtighten.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper coil seating before tightening. Avoid over-tightening which can damage the coil.

Starting System

1

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the starter is correctly aligned and fully seated before torquing. Over-tightening may damage the housing.

Charging System

1

Alternator Mounting Bolt

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the alternator is properly seated. Over-tightening may damage the alternator housing or mounting brackets.

Battery Connections

1

Battery Terminal Nut

M8 x 1.25
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Hand-tighten only, do not over-tighten. Use a wrench for a final snugging only. Ensure clean terminals for optimal contact.

Engine Control Unit

1

ECU Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten these bolts as it can damage the ECU or the mounting bracket.

Ground Connections

1

Ground Strap Terminal Bolt (Chassis)

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the connection surface is clean and free of corrosion before tightening. This is a higher torque for a chassis ground.
2

Ground Wire Terminal Bolt (Engine Block)

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the connection surface is clean and free of corrosion before tightening. This is a common engine ground bolt size.

Wiring Harness Connectors

1

Wiring Harness Connector Mounting Screw

M4 x 0.7
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Use only a hand driver, avoid over-tightening to prevent damage to the plastic connector housing. Torque value is estimated.

Sensor Mounts

1

Crankshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the sensor is correctly aligned before tightening. Do not over-tighten as this may damage the sensor.
2

Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the sensor is correctly aligned before tightening. Do not over-tighten as this may damage the sensor.
3

Mass Airflow Sensor Mounting Bolt

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure the sensor is correctly aligned before tightening. Do not over-tighten as this may damage the sensor. Torque value is estimated.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure mating surfaces are clean and free of debris. Always use new gaskets where specified. Tighten in a star pattern from the center outwards to ensure even sealing pressure.
2

Exhaust Manifold/Headers Bolts (Collector)

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
This is the torque for bolting together exhaust manifold sections or attaching the manifold to the downpipe, if applicable. Use new hardware if specified. Apply anti-seize to the threads to prevent galling.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the flanges are clean and flat. Use new gaskets to ensure a proper seal. Applying anti-seize will help with future disassembly.
4

Oxygen (O2) Sensor

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Apply anti-seize compound to the sensor threads, but be careful not to get any on the sensor tip. Ensure the threads are clean before installation. Do not over-tighten to avoid sensor damage. This is an estimated value, please consult the sensor's datasheet or vehicle service manual for the exact spec.
5

NOx Sensor Mounting Bolt(s)

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
NOx sensors are sensitive and should not be over tightened. Confirm torque specification with OEM repair manual or sensor manufacturer. This is an estimated value.

Egr System

1

EGR Valve Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the EGR valve and mating surfaces are clean. Use a new gasket if recommended. Tighten evenly to avoid leaks.

Intake System

1

Mass Airflow (MAF) Sensor Bolts

M5 x 0.8
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
The MAF sensor is sensitive; do not over-tighten. Ensure that the sensor is properly seated in the intake tube before tightening. This is an estimated value.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold/Header to Cylinder Head Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 20 ft-lbs (27 N·m)
Important Notes
Torque bolts in a criss-cross pattern. Final torque is critical to prevent exhaust leaks. Apply anti-seize to bolt threads.
2

Exhaust Pipe to Exhaust Manifold/Header Flange Bolts

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Usually spring-loaded bolts. Ensure proper alignment of the flanges before tightening. Apply anti-seize to bolt threads.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper gasket alignment. Apply anti-seize to bolt threads.

Muffler

1

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper gasket or sealant is in place. Apply anti-seize to bolt threads.

Exhaust Hangers

1

Exhaust Hanger Bracket Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Do not overtighten, may damage rubber isolators. Apply anti-seize to bolt threads.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Specification
28 ft-lbs (38 N·m)
Important Notes
Do not overtighten. Apply anti-seize to the sensor threads.

Exhaust Clamps

1

Exhaust Pipe Clamps

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure clamps are properly positioned. Do not overtighten, this can crush the exhaust pipes. Apply anti-seize to the threads of the clamp bolt/nut.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure all mounting surfaces are clean. Tighten evenly.
2

Fuel Pressure Sensor Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten carefully to avoid damaging the sensor. Do not over-tighten these small bolts.

Fuel Injectors

1

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper injector alignment and seating before tightening. Tighten evenly to maintain even seal.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure fuel pump is properly aligned in the tank before tightening. Mounting bolts should be evenly tightened.
2

High Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the high-pressure fuel pump to the engine. Use a crisscross tightening pattern. Ensure proper alignment before tightening.

Fuel Tank

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure straps are correctly aligned with the tank before tightening. Tighten evenly to ensure correct clamping of the fuel tank.
2

Fuel Tank Sending Unit Retaining Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten the bolts evenly. If the sending unit uses a locking ring, consult service manual for correct installation procedure which may require special tool.
3

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Check alignment before tightening. Ensure a good seal when tightening the bolts.

Fuel Lines

1

Fuel Line Connection Fittings (Banjo Bolts/Compression)

Varies by size and type
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque specification varies based on fitting size and type. This is an estimated value for a medium-sized fitting. Consult specific vehicle service manual for accurate values. Over tightening can damage the fittings. Use new sealing washers or gaskets when available.

Fuel Filter

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Make sure the filter is correctly aligned. Install any o-rings, crush washers, and other sealing parts when installing new filter.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure the mounting surfaces are clean and free of debris. Apply even torque to all bolts.
2

A/C Line Fitting to Compressor

3/4-16 flare nut
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a flare nut wrench to prevent damage to the fitting. Ensure o-rings are in good condition and lubricated with refrigerant oil.

Blower Motor

1

Blower Motor Mounting Screws

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten screws evenly to prevent damage to the blower housing. Estimated value.

Condenser

1

Condenser Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure the condenser is properly aligned and not stressed during mounting. Estimated Value.
2

A/C Line Fitting to Condenser

3/8-24 flare nut
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a flare nut wrench to prevent damage to the fitting. Ensure o-rings are in good condition and lubricated with refrigerant oil.

Evaporator

1

Evaporator Core Housing Screws

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not over-tighten these screws to avoid damaging the plastic housing. Estimated Value.
2

A/C Line Fitting to Evaporator

3/8-24 flare nut
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a flare nut wrench to prevent damage to the fitting. Ensure o-rings are in good condition and lubricated with refrigerant oil.

Expansion Valve

1

Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment to prevent damage to valve or housing. Estimated value.

Blend Door Actuator

1

Blend Door Actuator Mounting Screws

M5 x 0.8 self-tapping
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not over-tighten these screws to avoid stripping the plastic housing. Estimated Value. Apply even pressure.

Hvac Control Module

1

HVAC Control Module Mounting Screws

M4 x 0.7
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
These screws hold delicate electronic components, do not over tighten. Estimated Value.

Suspension

Torque specifications for Suspension

Front Struts

1

Strut/Shock Absorber Lower Mounting Bolts to Steering Knuckle

M14 x 1.5
Torque Specification
1. 65 ft-lbs (88 N·m) 2. 90°
Important Notes
Tighten bolts to specified torque, then turn an additional 90 degrees. Always replace these bolts when removed.
2

Strut/Shock Absorber Upper Mounting Nuts/Bolts to Body

M10 x 1.25
Torque Specification
1. 30 ft-lbs (40 N·m) 2. 90°
Important Notes
Tighten to initial torque, then an additional 90 degrees. Use new nuts/bolts. Always follow a cross tightening pattern.

Front Control Arms

1

Front Control Arm Mounting Bolts (Chassis Side)

M14 x 1.5
Torque Specification
85 ft-lbs (115 N·m)
Important Notes
Ensure the suspension is at ride height when tightening to ensure proper preload of bushings.
2

Ball Joint Nut

M12 x 1.5
Torque Specification
55 ft-lbs (75 N·m)
Important Notes
Use a new nut if previously removed. Ensure the ball joint is properly seated before tightening.

Rear Suspension

1

Rear Upper Control Arm Mounting Bolt (Chassis Side)

M12 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m) 2. 90°
Important Notes
Tighten to specified torque, then turn an additional 90 degrees. Always use a new bolt.
2

Rear Lower Control Arm Mounting Bolt (Chassis Side)

M14 x 1.5
Torque Specification
1. 74 ft-lbs (100 N·m) 2. 90°
Important Notes
Tighten to specified torque, then turn an additional 90 degrees. Always use a new bolt.

Steering

1

Tie Rod End Nut

M12 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the tie rod end is correctly seated in the knuckle.

Sway Bar

1

Sway Bar Link Nut

M10 x 1.5
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure both the sway bar and control arm or strut mounting points are properly aligned before tightening.

Wheel Hub

1

Wheel Hub/Bearing Retaining Bolt/Nut

M20 x 1.5
Torque Specification
1. 148 ft-lbs (200 N·m) 2. 180°
Important Notes
Tighten to the specified torque and then rotate an additional 180 degrees. Always use a new bolt/nut.

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 for the cylinder head bolts on a 2012-2017 N63 4.4L twin-turbocharged V8 engine in a BMW 650i?

10 + 180 Nm (7.4 + 133 ft-lb) in two steps

Q2

What IS the correct tightening sequence for the intake manifold bolts on a 2013 BMW 650i xDrive Gran Coupe?

Tighten the bolts in the following sequence: 1-8-5-2-7-4-3-6. Refer to BMW technical document SI B11 12 13 for detailed instructions.

Q3

What torque wrench should I use for critical engine component bolts?

Use a high-quality torque wrench with traceable calibration and accuracy within ±3%. BMW recommends using a click-type torque wrench.

Q4

How do I prevent overtightening or undertightening bolts?

Always use a properly calibrated torque wrench and follow BMW's specified torque values. Double-check your work by re-tightening the bolt to the specified torque.

Q5

What are the consequences of incorrect bolt torque?

Incorrect bolt torque can lead to component failure, oil leaks, and even engine damage. Always follow BMW's specified torque values to ensure proper operation and safety.

Q6

Where can I find additional technical information about BMW bolt torque specifications?

Refer to the BMW TIS (Technical Information System) or BMW repair manuals for detailed specifications and technical bulletins.

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 650i.

  • 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
Technical Service Bulletins

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Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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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.

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