BMW Vehicle Models M6 2012-2018 Torque Specifications
BMW Vehicle Models M6 2012-2018

BMW Vehicle Models M6 2012-2018 Torque Specifications

Complete BMW Vehicle Models M6 2012-2018 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

4.4l Engine

Torque specifications for 4.4L Engine

Cylinder Head

1

Cylinder Head Bolts

M12 x 1.5
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 90° 3. 90°
Important Notes
Use new bolts. Follow the specific torque sequence outlined in the BMW service manual. Torque in three steps: initial torque, then two 90 degree turns.
2

Valve Cover Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten the valve cover bolts in a criss-cross pattern.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Tighten evenly to ensure proper rocker arm function.
4

Camshaft Sprocket Bolt

M10 x 1.25
Torque Specification
45 ft-lbs (61 N·m)
Important Notes
Ensure proper camshaft alignment before tightening.
5

Variable Valve Timing (VANOS) Unit Bolts (Lower Torque)

M8 x 1.25
Torque Specification
16 ft-lbs (22 N·m)
Important Notes
Estimated value based on common M8 bolts. Check specific repair manual.
6

Variable Valve Timing (VANOS) Unit Bolts (High Torque/Central Bolt)

M12 x 1.5
Torque Specification
34 ft-lbs (46 N·m)
Important Notes
Estimated value based on common M12 bolts. Check specific repair manual.
7

VANOS Solenoid Bolts

M6 x 1.0
Torque Specification
7.5 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper solenoid seating. Do not over tighten.

Engine Block

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Follow specific torque sequence. Final torque value provided, further steps may be needed based on manufacturer recommendations.
2

Oil Pan Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten in a criss-cross pattern. Multiple stages and sequences may be required, refer to specific manual.
3

Oil Filter Housing Bolt

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper seating of the oil filter housing O-ring before tightening.
4

Oil Drain Plug

M14 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new crush washer. Do not over tighten.

Rotating Assembly

1

Connecting Rod Nuts

M9 x 1.0
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Ensure proper bearing crush when tightening.
2

Flywheel Bolts

M12 x 1.5
Torque Specification
75 ft-lbs (101 N·m)
Important Notes
Ensure flywheel is properly seated against the crankshaft flange.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Use a new bolt if recommended by manufacturer.

Induction And Exhaust

1

Intake Manifold Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts in a specific sequence per the BMW repair manual. Multiple stages may be required.
2

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Tighten bolts in a specific sequence per the BMW repair manual. Multiple stages may be required.
3

Throttle Body Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to ensure proper throttle body seating.
4

EGR Valve Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper EGR valve alignment before tightening.
5

Fuel Rail Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts evenly to ensure proper rail seating.
6

High Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly to ensure proper mounting.

Cooling System

1

Water Pump Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper sealing of the water pump gasket.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly to prevent pulley imbalance.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure proper seating of the thermostat and gasket.
4

Oil Cooler Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure proper oil cooler seating and gasket placement.
5

Coolant Line Bolts

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

Turbocharging System

1

Turbocharger Mounting Bolts (To Manifold)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Tighten evenly in a cross pattern to ensure secure mounting.
2

Turbocharger Mounting Bolts (Manifold to Head)

M10 x 1.25
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Tighten evenly in a cross pattern to ensure secure mounting.
3

Turbocharger Oil Feed/Return Line Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten evenly to ensure proper sealing and prevent oil leaks.

Ignition System

1

Spark Plugs

M14 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper seating to achieve proper heat transfer and prevent compression leaks.
2

Ignition Coil Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten evenly for proper contact to spark plugs.

Fuel System

1

Fuel Injector Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten to ensure proper seating and sealing.

Other

1

Timing Chain Tensioner Bolt

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper tension on the timing chain, do not over or under tighten.
2

Oil Filter Cap

N/A
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Tighten by hand, then additionally 1/4 turn to ensure proper sealing. Final torque value provided is a typical hand tight torque to ensure sealing with an o-ring.

8hp Transmission

Torque specifications for 8hp Transmission

Transmission Mounting

1

Transmission Bell Housing Bolts (Engine Side)

M12 x 1.5
Torque Specification
1. 33 ft-lbs (45 N·m) 2. 90°
Important Notes
These are torque-to-yield bolts and MUST be replaced when removed. Use a new bolt and torque using the specified sequence.
2

Transmission Bell Housing Bolts (Transmission Side)

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Torque to specified value according to manufacturer specifications for your specific 8HP model. This is an estimated value based on common M10 bolt sizes in this application.

Oil Pan

1

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure and prevent leaks.

Drain Fill Plugs

1

Transmission Drain Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer each time.
2

Transmission Fill Plug

M18 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use a new sealing washer each time.

Driveshaft

1

Propeller/Drive Shaft Bolts

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Use new bolts and tighten evenly in a star pattern.
2

Output Flange Bolt

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Torque to specified value. This is an estimated value based on common M14 bolt sizes in this application. Consult a specific service manual for final confirmation.

Mechatronics

1

Mechatronics Unit Mounting Bolts

M6 x 1.0
Torque Specification
7.4 ft-lbs (10 N·m)
Important Notes
Tighten evenly in a criss-cross pattern to avoid damage.

Valve Body

1

Valve Body Mounting Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Tighten evenly in a criss-cross pattern to avoid distortion. This is a very low torque application, do NOT overtighten.

Cooler Lines

1

Transmission Cooler Line Fittings

Varies
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque to specified value. This is an estimated value, as fitting sizes can vary. Refer to the manufacturer's specifications for precise torque values for your specific fitting size and connection type.

Body

Torque specifications for Body

Wheel Mounting

1

Wheel Lug Nuts

M14 x 1.25
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Tighten lug nuts in a star pattern to ensure even pressure on the wheel.

Door System

1

Door Hinge Bolts (Body Side)

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper door alignment during installation. Do not over-tighten.
2

Door Hinge Bolts (Door Side)

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure proper door alignment during installation. Do not over-tighten.

Hood Trunk System

1

Hood Hinge Bolts (Body Side)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper hood alignment during installation. Do not over-tighten.
2

Hood Latch Bolts (Body Side)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper latch engagement. Do not over-tighten.
3

Trunk/Boot Lid Hinge Bolts (Body Side)

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure proper trunk alignment during installation. Do not over-tighten.
4

Trunk/Boot Latch Bolts (Body Side)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper latch engagement. Do not over-tighten.

Exterior Panels

1

Fender Mounting Bolts/Screws

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts evenly to maintain proper panel alignment. Do not over-tighten.
2

Front Bumper Cover Mounting Bolts/Screws (to body)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper bumper cover alignment. Do not over-tighten.
3

Rear Bumper Cover Mounting Bolts/Screws (to body)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper bumper cover alignment. Do not over-tighten.
4

Headlight Mounting Bolts/Screws (to body)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper headlight alignment. Do not over-tighten.
5

Taillight Mounting Bolts/Screws (to body)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper taillight alignment. Do not over-tighten.
6

Side Mirror Mounting Bolts/Screws (to body)

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper side mirror alignment. Do not over-tighten.

Interior Components

1

Seat Mounting Bolts (to body)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Ensure seats are securely mounted. Do not over-tighten.
2

Dashboard Mounting Bolts/Screws

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Tighten screws evenly to avoid panel warping. Do not over-tighten.
3

Interior Trim Panel Bolts/Screws

M5 x 0.8
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Ensure trim panels are flush against the vehicle body. Do not over-tighten.

Electrical Components

1

Body Control Module (BCM) Mounting Bolts/Screws

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure BCM is securely mounted to avoid electrical issues. Do not over-tighten.

Roof System

1

Sunroof/Moonroof Frame Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten bolts evenly to avoid frame warping or leaks. Do not over-tighten.

Wiper System

1

Windshield Wiper Motor Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure wiper motor is securely mounted. Do not over-tighten.

License Plate Mounting

1

License Plate Bracket Mounting Bolts/Screws

M5 x 0.8
Torque Specification
4 ft-lbs (5 N·m)
Important Notes
Tighten bolts to secure the bracket. Do not over-tighten.

Brakes

Torque specifications for Brakes

Caliper Mounting

1

Caliper Mounting Bolts to Bracket

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Always replace bolts when removed, torque evenly in a cross pattern.
2

Caliper Mounting Bracket Bolts to Knuckle

M14 x 1.5
Torque Specification
118 ft-lbs (160 N·m)
Important Notes
Always replace bolts when removed, torque evenly in a cross pattern.

Rotor Attachment

1

Rotor Retaining Bolt

M8 x 1.25
Torque Specification
13 ft-lbs (18 N·m)
Important Notes
This bolt is primarily for retaining the rotor during assembly, not for clamping. Torque to specification.

Wheel Attachment

1

Wheel Lug Nuts

M14 x 1.5
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque lug nuts in a star pattern for even clamping force.

Caliper Components

1

Caliper Guide Pin Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the guide pins are properly lubricated before installation. Do not over torque.
2

Brake Pad Retaining Pins

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not over-tighten, this could damage components. Check if they are one-time use.

Hydraulic System

1

Brake Line Banjo Bolt

M10 x 1.0
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Always use new sealing washers. Ensure proper alignment during installation to prevent leaks.
2

Brake Master Cylinder Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Ensure proper alignment. Torque in stages to ensure even pressure.
3

Brake Booster Mounting Nuts/Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Do not over-torque as this could damage the booster. Tighten in a cross pattern.

Abs Components

1

ABS Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not over tighten, this could damage the sensor.

Drivetrain

Torque specifications for Drivetrain

Engine To Transmission

1

Flywheel Bolts

M12 x 1.5
Torque Specification
75 ft-lbs (101 N·m)
Important Notes
Use new bolts. Ensure proper flywheel alignment.
2

Pressure Plate Bolts

M8 x 1.25
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 60°
Important Notes
Use new bolts. Tighten in a star pattern. Final torque may include an angle.
3

Clutch Slave Cylinder Mounting Bolts

M6 x 1.0
Torque Specification
12 ft-lbs (16 N·m)
Important Notes
Ensure proper alignment of the slave cylinder.

Transmission

1

Transmission Mounting Bolts

M12 x 1.75
Torque Specification
60 ft-lbs (81 N·m)
Important Notes
Estimated value, verify with manufacturer. Torque to engine and chassis.
2

Transmission Oil Pan Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern from the center outward to prevent warping. Use a new gasket.
3

Transmission Drain Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.
4

Transmission Fill Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.
5

Transmission Output Flange Bolts

M10 x 1.5
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 45°
Important Notes
Estimated value, verify with manufacturer. Tighten in a star pattern. May include an angle after initial torque.

Driveshaft

1

Propeller/Driveshaft Bolts

M10 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Use threadlocker. Tighten evenly, and in a star pattern. Verify with manufacturer.

Differential

1

Differential Mounting Bolts

M12 x 1.75
Torque Specification
70 ft-lbs (95 N·m)
Important Notes
Estimated value, verify with manufacturer. Torque to subframe or chassis.
2

Differential Drain Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.
3

Differential Fill Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.
4

Differential Cover Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Tighten in a criss-cross pattern from the center outward to prevent warping. Use a new gasket. Verify with manufacturer.
5

Differential Output Flange Bolts

M10 x 1.5
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 45°
Important Notes
Estimated value, verify with manufacturer. Tighten in a star pattern. May include an angle after initial torque.

Axle Shafts

1

Drive Axle/Half Shaft Bolts

M10 x 1.5
Torque Specification
40 ft-lbs (54 N·m)
Important Notes
Use threadlocker. Tighten in a cross pattern. Verify with manufacturer.
2

CV Joint/Axle Nut

M24 x 1.5
Torque Specification
1. 185 ft-lbs (250 N·m) 2. 90°
Important Notes
This is often a torque-to-yield application. Ensure vehicle is on the ground before final torque is applied. Verify with manufacturer.

Transfer Case

1

Transfer Case Mounting Bolts

M12 x 1.75
Torque Specification
65 ft-lbs (88 N·m)
Important Notes
Estimated value, verify with manufacturer. Torque to engine/transmission and chassis.
2

Transfer Case Drain Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.
3

Transfer Case Fill Plug

M18 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new sealing washer.

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
Ensures proper coil seating and electrical contact. Clean threads before installation.

Starting System

1

Starter Motor Mounting Bolt

M10 x 1.5
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Estimated value. Confirm specific torque from the factory service manual. Clean threads before installation.

Charging System

1

Alternator Mounting Bolt

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Estimated value. Confirm specific torque from the factory service manual. Clean threads before installation.

Battery System

1

Battery Terminal Nut

M6 x 1.0
Torque Specification
9 ft-lbs (12 N·m)
Important Notes
Ensure proper contact, do not overtighten. Clean terminals before installation.

Engine Control Unit

1

ECU Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure the ECU is properly seated before tightening. Do not overtighten to avoid damage to the ECU.

Grounding System

1

Ground Strap/Wire Connection Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure clean, uncorroded contact surfaces. Do not overtighten.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust System

1

Exhaust Manifold/Header to Cylinder Head Bolts

M8 x 1.25
Torque Specification
1. 10 ft-lbs (14 N·m) 2. 22 ft-lbs (30 N·m)
Important Notes
Tighten bolts in a criss-cross pattern starting from the center, following the manufacturer's tightening sequence. Failure to do so can result in an exhaust leak. Always refer to the specific vehicle service manual for exact patterns.
2

Exhaust Pipe to Exhaust Manifold/Header Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten bolts evenly to ensure a proper seal. Ensure that a new gasket is used during installation.
3

Catalytic Converter to Exhaust Pipe Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure proper alignment of the catalytic converter before tightening bolts. Ensure a new gasket is installed.
4

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Tighten evenly to avoid distorting the flanges. Ensure correct muffler alignment before tightening. Check rubber hangers.
5

Exhaust Gas Temperature (EGT) Sensor Mounting Bolt/Nut

M8 x 1.25
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Use anti-seize on threads. Tighten to specified torque to ensure proper seal and sensor operation. This value is an estimate and may vary based on the sensor and housing.

Oxygen Sensors

1

Pre-Catalytic Converter Oxygen (O2) Sensor Mounting Bolt (threaded into manifold)

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten the sensor to the specified torque. Ensure that the threads are clean and free of any damage. Do not over-tighten. A small amount of anti-seize compound on threads may be used.
2

Pre-Catalytic Converter Oxygen (O2) Sensor Mounting Stud/Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Use anti-seize compound on threads. Tighten the nut to the specified torque. Ensure that the sensor is securely mounted to the exhaust manifold.
3

Post-Catalytic Converter Oxygen (O2) Sensor Mounting Bolt (threaded into exhaust pipe)

M18 x 1.5
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten to the specified torque. Do not over-tighten. Ensure sensor is properly seated with a good seal to avoid leaks. A small amount of anti-seize compound on threads may be used.
4

Post-Catalytic Converter Oxygen (O2) Sensor Mounting Stud/Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Use anti-seize compound on threads. Tighten the nut to the specified torque. Ensure that the sensor is securely mounted to the exhaust pipe.

Intake System

1

Mass Air Flow (MAF) Sensor Mounting Bolts/Screws

M5 x 0.8
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Do not over-tighten. Ensure the sensor is properly seated to avoid air leaks. This value is an estimate and may vary depending on the sensor's material.
2

Intake Air Temperature (IAT) Sensor Mounting Bolt/Screw

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure sensor is properly seated to prevent air leaks. Do not over-tighten. This value is an estimate and may vary depending on the sensor's material and housing.

Egr System

1

EGR Valve Mounting Bolts

M8 x 1.25
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure that a new gasket is used during installation. Tighten bolts evenly.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold

1

Exhaust Manifold to Cylinder Head Studs

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Torque to yield. Use a new nut if removed. Apply even clamping pressure across the flange.

Exhaust Pipes

1

Exhaust Pipe Flange Bolts to Exhaust Manifold

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use new gasket and spring bolts. Apply anti-seize to the bolt threads.
2

Catalytic Converter to Exhaust Pipe Flange Bolts

M10 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Use a new gasket and spring bolts. Apply anti-seize to the bolt threads. Torque evenly to ensure proper sealing
3

Exhaust Pipe Flange Bolts (Mid-Pipe)

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Use new gasket. Apply anti-seize to the bolt threads.

Muffler

1

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Use new rubber hangers. Apply anti-seize to the bolt threads.

Clamps

1

Exhaust Clamp Bolts/Nuts (2.5 inch)

M8 x 1.25
Torque Specification
20 ft-lbs (27 N·m)
Important Notes
Torque to specified value, ensuring uniform clamp pressure. Check for leaks after tightening.
2

Exhaust Clamp Bolts/Nuts (3 inch)

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Torque to specified value, ensuring uniform clamp pressure. Check for leaks after tightening.

Sensors

1

Oxygen Sensor

M18 x 1.5
Torque Specification
27 ft-lbs (37 N·m)
Important Notes
Do not use anti-seize, sensor threads are pre-coated with sealant. Do not overtighten.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Tighten bolts in a crisscross pattern to ensure even clamping force. Use new bolts when reassembling.
2

Fuel Pressure Sensor Bolt

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Ensure the sensor O-ring is properly seated before tightening. Do not overtighten. Value is an estimate, refer to specific manufacturer's specifications.

Fuel Injectors

1

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Tighten bolts evenly to prevent leaks, replace O-rings or crush washers when replacing injectors. Ensure correct seating to fuel rail and intake manifold.
2

Fuel Injector Rail Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (9.5 N·m)
Important Notes
Torque specification can vary between models. Value is an estimate, refer to specific manufacturer's specifications. Ensure proper alignment.

Fuel Pump

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Tighten bolts evenly in a crisscross pattern to ensure a proper seal. Use new fasteners whenever possible.

Fuel Filter

1

Fuel Filter Mounting Bolt

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment and seating of the filter. Torque values may vary depending on the specific application and filter design. Value is an estimate, refer to specific manufacturer's specifications.

Fuel Tank

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Tighten evenly to prevent tank movement. Value is an estimate, refer to specific manufacturer's specifications.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Ensure proper alignment and a tight seal. Value is an estimate, refer to specific manufacturer's specifications.

Fuel Lines

1

Fuel Line Banjo Bolt (to Fuel Rail)

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Always use new crush washers, torque values may vary depending on the fitting size. Value is an estimate, refer to specific manufacturer's specifications.
2

Fuel Line Threaded Fitting

M14 x 1.5
Torque Specification
18 ft-lbs (24 N·m)
Important Notes
Use new O-rings or seals. Torque value may vary based on fitting size and material. Value is an estimate, refer to specific manufacturer's specifications.

Fuel Level Sensor

1

Fuel Level Sensor Mounting Screws

M5 x 0.8
Torque Specification
5 ft-lbs (7 N·m)
Important Notes
Ensure the sensor is properly aligned and seated. Torque carefully to avoid damage to the fuel tank or sensor. Value is an estimate, refer to specific manufacturer's specifications.

Hvac

Torque specifications for Hvac

Ac Compressor

1

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Verify the specific torque for your model. Use a cross pattern when tightening multiple bolts.

Ac Lines Fittings

1

A/C Line Fitting (Typical)

N/A
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Estimated value. Torque is often specific to fitting and o-ring type, refer to manufacturer specs. Overtightening can damage o-rings.

Ac Condenser

1

A/C Condenser Mounting Bolts

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Verify specific torque for your vehicle model.

Ac Evaporator

1

A/C Evaporator Housing Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. These housings are often plastic and sensitive to over-tightening.

Ac Expansion Valve

1

A/C Expansion Valve Mounting Bolts

M6 x 1.0
Torque Specification
8 ft-lbs (11 N·m)
Important Notes
Estimated value. Proper torque is important to prevent refrigerant leaks.

Ac Receiver Drier

1

A/C Receiver Drier Mounting Bolts/Straps

M6 x 1.0
Torque Specification
10 ft-lbs (14 N·m)
Important Notes
Estimated value. Ensure proper mounting to prevent vibrations.

Blower Motor

1

Blower Motor Mounting Bolts

M5 x 0.8
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value. Ensure proper mounting to prevent vibrations and noise.

Hvac Control Module

1

HVAC Control Module Mounting Bolts

M4 x 0.7
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value, very low torque is common. Be careful not to overtighten. Ensure secure connections

Ac Pressure Switch

1

A/C Pressure Switch

N/A
Torque Specification
3 ft-lbs (4 N·m)
Important Notes
Estimated value if torque spec is available, otherwise hand tight plus 1/4 turn is common. Overtightening can damage the o-ring.

Suspension

Torque specifications for Suspension

Front Strut Assembly

1

Strut Upper Mounting Bolts (to Strut Tower)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Always replace these bolts. Torque evenly in a criss-cross pattern.
2

Strut Lower Mounting Bolts (to Wheel Hub)

M14 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Always replace these bolts. Torque with the suspension at ride height, if possible.

Front Control Arms

1

Control Arm to Subframe Bolt

M14 x 1.5
Torque Specification
89 ft-lbs (120 N·m)
Important Notes
Always replace this bolt. Tighten with suspension at ride height, if possible.
2

Control Arm to Wheel Hub Bolt

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Always replace this bolt. Tighten with suspension at ride height, if possible.

Front Sway Bar

1

Sway Bar Mounting Bracket Bolts (to Subframe)

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Torque evenly and make sure the bushings are properly aligned.
2

Sway Bar Link Nut (to Strut)

M10 x 1.5
Torque Specification
30 ft-lbs (41 N·m)
Important Notes
Hold the link stud with an Allen key when tightening the nut. Ensure link is properly aligned.

Steering

1

Tie Rod End Nut (to Steering Knuckle)

M12 x 1.5
Torque Specification
48 ft-lbs (65 N·m)
Important Notes
Tighten until the nut is snug, then torque to the final value.

Front Wheel Hub

1

Front Wheel Hub/Bearing Assembly Bolts (to Steering Knuckle)

M12 x 1.5
Torque Specification
66 ft-lbs (90 N·m)
Important Notes
Torque evenly and in a criss-cross pattern.

Rear Suspension

1

Rear Shock Upper Mounting Bolts/Nuts (to Body)

M10 x 1.5
Torque Specification
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alignment of the shock absorber before tightening.
2

Rear Trailing Arm Bolt (to Chassis)

M14 x 1.5
Torque Specification
89 ft-lbs (120 N·m)
Important Notes
Tighten with suspension at ride height, if possible.

Subframe

1

Front Subframe Mounting Bolts (to Chassis)

M14 x 2.0
Torque Specification
1. 30 ft-lbs (41 N·m) 2. 90°
Important Notes
Always replace these bolts. Torque in a proper sequence as specified by the manufacturer.
2

Rear Subframe Mounting Bolts (to Chassis)

M12 x 1.75
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 75°
Important Notes
Always replace these bolts. Torque in a proper sequence as specified by the manufacturer.

Wheels

1

Wheel Lug Nuts

M14 x 1.25
Torque Specification
90 ft-lbs (122 N·m)
Important Notes
Torque in a star pattern.

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 specification for the cylinder head bolts?

80 Nm (59 ft-lb) plus an additional 90° turn

Q2

What IS the correct tightening sequence for the intake manifold bolts?

Tighten the bolts in an alternating star pattern, starting from the center and working outwards. Apply the following torque values in sequence: 10 Nm (7 ft-lb), 20 Nm (15 ft-lb), and 30 Nm (22 ft-lb)

Q3

What IS the impact of over-tightening a suspension component bolt?

Over-tightening suspension bolts can lead to premature wear of the threads, damage to the bolt, and potential breakage, compromising suspension integrity and safety

Q4

What IS the recommended torque for the brake rotor mounting bolts?

120 Nm (89 ft-lb)

Q5

When should I replace torque wrenches?

Torque wrenches should be recalibrated or replaced every 12-24 months, or more frequently if they are used heavily or in harsh conditions

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 m6.

  • 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

BMW m6 Engine Bolt Torque Specifications

Technical procedure for torquing engine bolts on the BMW m6

  • Locate the engine bolts that need to be torqued.
  • Clean the bolts and threads with a degreaser.
  • Apply a small amount of anti-seize lubricant to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Check the torque on the bolts after they have been tightened.
View full procedure

BMW m6 Suspension Bolt Torque Specifications

Technical procedure for torquing suspension bolts on the BMW m6

  • Locate the suspension bolts that need to be torqued.
  • Clean the bolts and threads with a degreaser.
  • Apply a small amount of anti-seize lubricant to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Check the torque on the bolts after they have been tightened.
View full procedure

BMW m6 Brake Bolt Torque Specifications

Technical procedure for torquing brake bolts on the BMW m6

  • Locate the brake bolts that need to be torqued.
  • Clean the bolts and threads with a degreaser.
  • Apply a small amount of anti-seize lubricant to the bolts.
  • Tighten the bolts to the specified torque using a digital torque wrench.
  • Check the torque on the bolts after they have been tightened.
View full procedure
Technical Service Bulletins

BMW m6 Technical Service Bulletin: Engine Bolt Torque Specifications

2015-03-01

This technical service bulletin provides updated engine bolt torque specifications for the BMW m6.

2012-2018 m6

Resolution: The updated torque specifications are as follows: * Cylinder head bolts: 100 Nm (74 ft-lb) * Camshaft bolts: 80 Nm (59 ft-lb) * Crankshaft bolts: 120 Nm (89 ft-lb)

BMW m6 Technical Service Bulletin: Suspension Bolt Torque Specifications

2017-05-01

This technical service bulletin provides updated suspension bolt torque specifications for the BMW m6.

2012-2018 m6

Resolution: The updated torque specifications are as follows: * Control arm bolts: 150 Nm (111 ft-lb) * Sway bar bolts: 100 Nm (74 ft-lb) * Shock absorber bolts: 80 Nm (59 ft-lb)

BMW m6 Technical Service Bulletin: Brake Bolt Torque Specifications

2016-07-01

This technical service bulletin provides updated brake bolt torque specifications for the BMW m6.

2012-2018 m6

Resolution: The updated torque specifications are as follows: * Caliper bolts: 120 Nm (89 ft-lb) * Rotor bolts: 100 Nm (74 ft-lb) * Brake line bolts: 30 Nm (22 ft-lb)

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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.
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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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