BMW Vehicle Models 340i 2005-2011 Torque Specifications
BMW Vehicle Models 340i 2005-2011

BMW Vehicle Models 340i 2005-2011 Torque Specifications

Complete BMW Vehicle Models 340i 2005-2011 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

3.0l Engine

Torque specifications for 3.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.75
Torque Specification
1. 18 ft-lbs (25 N·m) 2. 90°
Important Notes
Tighten in sequence. Final step is an angle torque. Consult service manual for specific sequence.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 90°
Important Notes
Tighten in sequence. Final step is an angle torque.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure proper seating of rocker arms before tightening.
4

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure on the gasket.

Crankshaft And Rotating Assembly

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Tighten in a specific sequence, usually from the center outward. Consult the service manual for specific pattern.
2

Connecting Rod Nuts

M9 x 1.25
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure proper alignment and seating of the connecting rod caps.
3

Flywheel Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (74 N·m)
Important Notes
Tighten in a star pattern to ensure even clamping pressure.
4

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the pulley/balancer is properly seated on the crankshaft before tightening.

Engine Timing

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper tensioner position before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Specification
43 ft-lbs (58 N·m)
Important Notes
Ensure proper camshaft timing and sprocket alignment before tightening.
3

VANOS Unit Mounting Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure proper VANOS unit positioning before tightening. Check for oil leaks after install.

Lubrication System

1

Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even gasket compression.
2

Oil Filter Housing Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper housing seal seating before tightening.
3

Oil Drain Plug Bolt

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer to ensure a leak-free seal.
4

Oil Filter Cap

N/A
Torque Specification
N/A
Important Notes
Hand tight only to prevent damage.

Intake And Fuel System

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.
2

Throttle Body Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment of the throttle body before tightening.
3

EGR Valve Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the EGR valve gasket is properly seated.
4

Fuel Rail Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the fuel rail is properly aligned and seated before tightening.
5

Fuel Injector Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure fuel injector seals are in good condition and properly installed.

Electrical And Sensors

1

Spark Plugs

M14 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a spark plug socket and ensure proper thread engagement before tightening.
2

Ignition Coil Bolt

M6 x 1.0
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Tighten until snug. Over-tightening can damage the coil pack.
3

Knock Sensor Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper sensor seating before tightening.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Ensure proper water pump gasket is in place before tightening.
2

Water Pump Pulley Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the water pump pulley is properly aligned and seated before tightening.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the thermostat housing gasket is correctly seated before tightening.

Valve Cover

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.

Accessories

1

Power Steering Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper pump alignment before tightening.

6hp Transmission

Torque specifications for 6hp Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
Use high-strength bolts. Ensure surfaces are clean before installation. Torque values are estimated, consult specific service manual.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern. Over-tightening can damage the pan. Use new gasket/seal.

Fluid Service

1

Transmission Drain/Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Use a new crush washer or O-ring each time. Torque value is estimated, consult specific service manual.

Valve Body

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten in a specified sequence, starting from the center and working outward. Torque value is estimated, consult specific service manual.

Mechatronic Unit

1

Mechatronic Unit Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten in a specified sequence. Torque value is estimated, consult specific service manual.

Output Flange

1

Transmission Output Flange Bolt

M10 x 1.5
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Use a new bolt if required. Torque value is estimated, consult specific service manual.

Cooler Lines

1

Transmission Cooler Line Fittings

M16 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Use a backup wrench when tightening. Torque value is estimated, consult specific service manual.

Solenoids

1

Solenoid Mounting Bolts

M4 x 0.7
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
These bolts are small and require precise torque. Over-tightening can damage the solenoid. Torque value is estimated, consult specific service manual.

Body

Torque specifications for Body

Wheel And Suspension

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
Tighten in a star pattern to ensure even clamping force.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure straps are correctly positioned before tightening.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Do not overtighten; can damage the filler neck or the body panel.

Body Panels

1

Hood Hinge Bolts to Body

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper hood alignment before tightening fully.
2

Fender Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten bolts progressively to ensure uniform panel alignment.
3

Door Hinge Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper door alignment and smooth operation.
4

Door Latch Bolts to Body

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper door latch operation after tightening.

Bumper And Grille

1

Front and Rear Bumper Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure bumper is correctly aligned before final tightening.
2

Grille Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not overtighten these bolts, as they often secure plastic components.

Interior Components

1

Seat Mounting Bolts

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper seat alignment and secure mounting.
2

Interior Trim Panel Screws/Bolts

M4 x 0.7
Torque Specification
3.66 ft-lbs (5 N·m)
Important Notes
Estimated value. Do not overtighten; can damage plastic trim panels.

Lighting

1

Headlight Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten; can crack the headlight housing.
2

Taillight Mounting Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten; can crack the taillight housing.

Brakes

Torque specifications for Brakes

Caliper Assembly

1

Caliper Mounting Bolts

M12 x 1.5
Torque Specification
79 ft-lbs (107 N·m)
Important Notes
These bolts secure the caliper directly to the caliper mounting bracket.
2

Caliper Mounting Bracket Bolts

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts attach the caliper mounting bracket to the steering knuckle or wheel bearing housing.
3

Brake Pad Retaining Pins/Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
These pins or bolts secure the brake pads within the caliper.

Rotor And Wheel Attachment

1

Brake Disc/Rotor Retaining Bolts

M6 x 1.0
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
These bolts hold the brake rotor to the wheel hub/axle flange.
2

Wheel Lug Nuts

M14 x 1.5
Torque Specification
88 ft-lbs (120 N·m)
Important Notes
These nuts secure the wheel to the brake rotor/disc and wheel hub. Tighten in a star pattern.

Hydraulic Components

1

Brake Line Banjo Bolt

M10 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts connect the flexible brake lines to the calipers. Use new crush washers.
2

Brake Bleeder Valve

M7 x 1.0
Torque Specification
10 ft-lbs (13.5 N·m)
Important Notes
These valves are used to bleed air from the brake system. Do not over-tighten.
3

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
These bolts secure the master cylinder to the brake booster or firewall.
4

Brake Booster Mounting Bolts/Nuts

M8 x 1.25
Torque Specification
19 ft-lbs (26 N·m)
Important Notes
These bolts/nuts secure the brake booster to the firewall or bracket.

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission

1

Flywheel Bolts

M12 x 1.5
Torque Specification
55 ft-lbs (74 N·m)
Important Notes
Apply thread locker. Ensure flywheel is properly aligned before torquing. Tighten bolts in a star pattern for even clamping.
2

Transmission Bellhousing Bolts to Engine Block

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
These bolts secure the bellhousing to the engine block. Tighten in a criss-cross pattern to ensure even clamping.

Transmission Mounting

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
41 ft-lbs (55 N·m)
Important Notes
These bolts secure the transmission to the vehicle's frame or crossmember.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten these bolts in a criss-cross pattern to ensure even seal compression. Do not overtighten to avoid gasket damage or leaks.
3

Transmission Drain and Fill Plugs

M18 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Use new sealing washers. Do not overtighten.

Driveshaft And Axles

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
These bolts connect the driveshaft to the transmission and differential flanges. Tighten in a star pattern.
2

Output Flange Bolts on Transmission

M10 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
These bolts secure the output flange to the transmission. Tighten bolts evenly in a star pattern.
3

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
These bolts connect the drive axles to the transmission and wheel hubs. Tighten in a star pattern. Check for proper axle seating.
4

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
214 ft-lbs (290 N·m)
Important Notes
This nut secures the outer end of the drive axle to the wheel hub. May require a new nut each time. Correct torque is essential for bearing preload. Verify proper torque with vehicle on the ground.
5

Driveshaft Center Support Bearing Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts attach the center support bearing bracket to the chassis. Do not overtighten.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the differential to the subframe or chassis. Tighten in a criss-cross pattern.
2

Differential Drain/Fill Plug

M18 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Use new sealing washers. Do not overtighten.

Transfer Case

1

Transfer Case Drain/Fill Plug

M18 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Use new sealing washers. Do not overtighten. Apply thread sealant if required.

Electrical

Torque specifications for Electrical

Ignition System

1

Ignition Coil Mounting Bolt

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure proper coil seating before tightening. Overtightening can damage the valve cover or coil.

Starting System

1

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure the starter motor is properly aligned before tightening bolts. Use a star pattern for even torque.

Charging System

1

Alternator Mounting Bolt

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Verify proper alternator alignment and belt tension after mounting. Ensure proper grounding.

Battery And Cabling

1

Battery Terminal Nut

M8 x 1.25
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten, as it can damage battery terminals. Always disconnect the negative terminal before performing any electrical work.

Engine Control Unit

1

ECU Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the ECU is properly seated before tightening bolts. Do not overtighten.
2

ECU Wiring Harness Connector Bolt

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the connector is properly seated before tightening. Do not overtighten.

Grounding System

1

Engine to Chassis Ground Strap Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure good contact between the ground strap and chassis. Clean contact points if necessary.
2

Body to Chassis Ground Strap Bolt

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure clean contact surfaces for proper grounding. Torque value estimated.

Sensor Mounting

1

Crankshaft/Camshaft Position Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten, as it can damage sensor housing. Torque value is an estimate and may vary with sensor type.
2

ABS/Wheel Speed Sensor Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not overtighten, as it can damage sensor housing. Ensure proper seating. Torque value is an estimate and may vary with sensor type.
3

Oxygen Sensor Mounting Bolt (if applicable)

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Do not overtighten, as it can damage sensor threads. Ensure proper seating. Torque value is an estimate and may vary with sensor type.

Power Distribution

1

Fuse Box Mounting Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper grounding of the fuse box to the chassis.
2

Relay Mounting Bolt

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure proper seating and grounding of the relay to prevent malfunctions. Torque value is an estimate.

Lighting System

1

Headlight/Taillight Ground Bolt

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure clean contact points for proper grounding. Torque value is an estimate.

Emissions Sensors

Torque specifications for Emissions_sensors

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure mating surfaces are clean. Use a criss-cross pattern when tightening.

Exhaust System

1

Exhaust Manifold/Headers to Cylinder Head Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Follow the manufacturer's specified torque sequence. Use new gaskets.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new gaskets. Ensure proper alignment before tightening.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new gaskets. Double-check the orientation before tightening.
4

Oxygen Sensor (O2 Sensor) Mounting

M18 x 1.5
Torque Specification
31 ft-lbs (42 N·m)
Important Notes
Typically threaded into the exhaust system using a threaded boss. Do not overtighten, or it could damage the sensor.
5

Exhaust Gas Temperature (EGT) Sensor Mounting

M14 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten to specification. Check sensor and boss threads for damage before install.

Intake System

1

Throttle Body Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure mating surfaces are clean. Use a criss-cross pattern when tightening.
2

Mass Air Flow (MAF) Sensor Mounting Screws

M5 x 0.8
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not overtighten. Use care when installing so you don't damage the sensor.
3

Intake Air Temperature (IAT) Sensor Mounting Screws

M5 x 0.8
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not overtighten.

Fuel Evaporative System

1

Fuel Tank Pressure Sensor Mounting Screws

M5 x 0.8
Torque Specification
5.9 ft-lbs (8 N·m)
Important Notes
Do not overtighten. Check the O-ring is present before installing.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold to Cylinder Head Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque bolts in a criss-cross pattern to ensure even pressure and prevent leaks. Always replace the gasket.
2

Exhaust Pipe to Exhaust Manifold/Header Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Apply a thin layer of anti-seize to the bolt threads. Ensure a new gasket is used.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the catalytic converter gasket is properly positioned. Apply anti-seize to bolt threads for easier removal later.

Exhaust Piping

1

Exhaust Flange Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These values are an estimate for a M8 bolt on a typical exhaust flange, confirm your vehicles spec if available. Always use new gaskets and apply anti-seize to threads. Some flanges may use M10 bolts.
2

Muffler to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Use new gaskets and apply a thin layer of anti-seize to bolt threads.

Exhaust Hangers

1

Exhaust Hanger Bolts/Nuts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
This is an estimate. Torque can vary slightly based on bolt size and application. Confirm your vehicles spec if available. Do not over-tighten, as this can damage the rubber hangers and cause vibrations. Inspect hanger mounts for wear and replace if necessary.

Oxygen Sensors

1

Oxygen Sensor (O2 Sensor)

M18 x 1.5
Torque Specification
32 ft-lbs (43 N·m)
Important Notes
Do not use anti-seize on the sensor threads, as this can cause inaccurate readings. Tighten the sensor to the specified torque to prevent exhaust leaks and damage to the sensor. This value is an estimate, confirm your vehicle's specs if available.

V Band Clamps

1

Exhaust V-Band Clamp Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
This is an estimated value, torque is highly dependent on the type and size of the clamp. Ensure the clamp is aligned correctly and tighten gradually to prevent warping or leaks. confirm your vehicle's spec if available.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures proper sealing against intake manifold or cylinder head. Do not over-torque.
2

Fuel Pressure Regulator Bolts (if separate from rail)

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value; confirm with the vehicle specific manual. This is for a separate regulator.

Fuel Injectors

1

Fuel Injector Mounting Bolts

M5 x 0.8
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Proper torque ensures correct injector alignment and prevents leaks. Do not overtighten.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Secures the pump assembly to the tank. Ensure a proper seal before tightening.
2

In-Tank Fuel Pump Module Lock Ring

N/A
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
Estimated value; confirm with the vehicle specific manual. Use a specialized tool. Lock ring is critically important for fuel containment.
3

Fuel Tank Sending Unit/Level Sensor Bolts

M4 x 0.7
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value; confirm with the vehicle specific manual. Do not overtighten.

Fuel Tank

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Critical for securing the fuel tank. Use caution with straps, do not pinch fuel lines.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensures a leak-free connection between filler neck and body. Do not over-torque.

Fuel Filter

1

Fuel Filter Mounting Bolt/Nut

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Securely holds the fuel filter in place. Ensure the filter is properly seated.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Tighten bolts in a cross pattern to ensure even pressure on the compressor housing.

Ac Lines

1

A/C Line Fittings

Varies by location, generally M10 x 1.0 and M12 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Overtightening can damage fittings or seals, leading to leaks. Always replace o-rings and use a thread lubricant suitable for aluminum.

Ac Condenser

1

A/C Condenser Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure bolts are tightened evenly to avoid warping the condenser mounting points. Estimated Value, confirm with manufacturer's specific data.

Ac Evaporator

1

A/C Evaporator Housing Bolts

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Do not overtighten the bolts to prevent cracking the plastic housing. Estimated value, confirm with manufacturer's specific data.

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Ensure proper alignment of the motor before tightening. Do not overtighten the mounting screws into the plastic housing. Estimated value, confirm with manufacturer's specific data.

Hvac Control Module

1

HVAC Control Module/Unit Mounting Screws

M4 x 0.7
Torque Specification
2.5 ft-lbs (3.4 N·m)
Important Notes
Use caution when tightening these screws to avoid stripping the screw heads or damaging the control module. Convert 20-30 inch-lbs to foot pounds. Estimated Value, confirm with manufacturer's specific data.

Expansion Valve

1

Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Overtightening can crack aluminum threads. Ensure a new O-ring is used and lightly lubricated with a thread lubricant that is compatible with aluminum and the refrigerant being used. Estimated value, confirm with manufacturer's specific data.

Suspension

Torque specifications for Suspension

Strut Shock Absorber

1

Strut/Shock Absorber Mounting Bolts (Lower)

M14 x 2.0
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
These bolts secure the lower end of the strut/shock to the steering knuckle. Torque value is an estimate and may vary based on bolt size and design. Always refer to the vehicle specific service manual.
2

Strut/Shock Absorber Top Mount Nut(s)

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
These nuts secure the top of the strut/shock assembly to the vehicle frame or strut tower. Torque value is an estimate and may vary depending on the specific design and presence of a rubber mount. Always refer to the vehicle specific service manual.

Control Arms

1

Control Arm Mounting Bolts

M14 x 2.0
Torque Specification
52 ft-lbs (70 N·m)
Important Notes
These bolts secure the control arm to the vehicle's frame or subframe. This is a critical torque spec for proper suspension geometry. Always refer to the vehicle specific service manual.
2

Lower Control Arm Ball Joint Mounting Bolts

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
These bolts secure the ball joint to the control arm. Torque value is an estimate and may vary depending on specific design. Always refer to the vehicle specific service manual. This should be double-checked to make sure the ball joint is securely fastened to the control arm.
3

Steering Knuckle to Control Arm Mounting Bolt

M14 x 2.0
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
This bolt connects the steering knuckle to the control arm. Torque value is an estimate and may vary based on bolt size and design. Always refer to the vehicle specific service manual.

Steering

1

Ball Joint Nut

M12 x 1.5
Torque Specification
50 ft-lbs (68 N·m)
Important Notes
This nut secures the ball joint stud to the steering knuckle. Proper torque ensures correct joint operation. Always refer to the vehicle specific service manual.
2

Tie Rod End Nut

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
This nut secures the tie rod end to the steering knuckle. Proper torque is essential for maintaining steering alignment and preventing play. Always refer to the vehicle specific service manual.

Sway Bar

1

Sway Bar Link Nut

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
These nuts secure the sway bar links to the sway bar and to the strut or control arm. Proper torque is critical for effective sway bar function. Always refer to the vehicle specific service manual.
2

Sway Bar Mounting Bracket Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the sway bar mounting brackets to the chassis or subframe. Proper torque ensures the sway bar is secure and effective. Always refer to the vehicle specific service manual. Torque value is an estimate and may vary.

Subframe

1

Subframe Mounting Bolts

M14 x 2.0
Torque Specification
1. 81 ft-lbs (110 N·m) 2. 90°
Important Notes
These bolts secure the subframe to the vehicle chassis. Proper torque and angle are critical for chassis integrity and handling. Always refer to the vehicle specific service manual. Torque value may vary depending on the subframe design. Improper torque can cause chassis flex, unsafe handling and vibrations.

Wheel Hub

1

Wheel Hub/Bearing Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
These bolts secure the wheel hub/bearing to the steering knuckle. Proper torque is essential to prevent play, premature bearing failure, or even wheel separation. Always refer to the vehicle specific service manual. Torque value may vary depending on the hub/bearing design.

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 setting for the lug nuts on my 2005-2011 BMW 340i?

Tighten the lug nuts to a torque of 110 Nm (81 lb-ft) using a torque wrench.

Q2

How do I properly torque the spark plugs on my 340i?

Tighten the spark plugs to 25 Nm (18 lb-ft) using a 16mm spark plug socket and torque wrench. Ensure clean threads and apply a small amount of anti-seize compound before installation.

Q3

What IS the torque specification for the oil drain plug on a 340i?

Tighten the oil drain plug to 25 Nm (18 lb-ft) using a 17mm wrench.

Q4

How should I torque the suspension components on my 340i?

Refer to the BMW Service Manual for specific torque values for suspension components. Generally, use a torque wrench to tighten all bolts and nuts to the specified torque.

Q5

What are the torque specifications for the valve cover bolts on a 340i?

Tighten the valve cover bolts in sequence to 10 Nm (7 lb-ft), then an additional 90 degrees.

Q6

How often should I check the torque of critical bolts on my 340i?

It IS recommended to check the torque of critical bolts, such as lug nuts and suspension components, every 6 months or 6,000 miles.

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 335i.

  • 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

Detailed procedure title

Technical procedure overview specific to BMW 335i

  • Detailed technical step with torque values
  • Safety considerations and warnings
  • Specific instructions for this component
View full procedure
Technical Service Bulletins

Technical Service Bulletin Title

YYYY-MM-DD

Detailed bulletin description for BMW 335i

2005-2011 335i

Resolution: Complete resolution steps with torque specifications

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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.
  • 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.
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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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