BMW M3 2007-2013 4.0L Engine Bolt Torque Specifications & Fastener Values
BMW M3 2007-2013

BMW M3 2007-2013 4.0L Engine Bolt Torque Specifications

Comprehensive list of bolt torque specifications for the 4.0L V8 engine found in the 2007-2013 BMW M3 (E90 sedan, E92 coupe, and E93 convertible). Includes torque values for critical engine components.

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

Cylinder Head

Specifications for components related to the cylinder head, including the head itself, valve train, and related sensors.

1

Cylinder Head Bolts

M10 or M12 (Estimate, verify specific size)
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value, verify specific bolt size and torque sequence. Follow BMW-specific torque sequence and use new bolts. These are likely Torque to Yield (TTY) bolts and must be replaced upon removal.
2

Valve Cover Bolts

M6
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Torque bolts evenly in a criss-cross pattern. Do not over-tighten.
3

Rocker Arms/Shafts Bolts

M8 (Estimate)
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value, Verify specification in the BMW service manual.
4

Camshaft Position Sensor Bolts

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten; could damage the sensor.
5

Camshaft Sprocket Bolts

M10 or M12 (Estimate)
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Estimated Value, confirm exact torque specification in the BMW service manual, ensure proper alignment before torquing.
6

Spark Plugs

M14 x 1.25 (Typical)
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Use a spark plug socket and torque wrench. Do not overtighten.

Engine Block

Specifications for components mounted to or within the engine block, including the crankshaft and main bearings.

1

Main Bearing Bolts

M12 or M14 (Estimate)
Torque Value
58 ft-lbs (79 N·m)
Important Notes
Estimated value, verify specification. Torque sequence is critical. Usually, they will follow the sequence of first torquing all bolts to 30 ft-lbs and then following the specified sequence of either all to 58 ft-lbs or additional angles after reaching this stage. Always replace with new bolts.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M14 or M16 (Estimate)
Torque Value
88 ft-lbs (119 N·m)
Important Notes
Estimated value, verify specification. Use a holding tool to prevent the crankshaft from turning while tightening.
3

Crankshaft Position Sensor Bolt

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten, could damage the sensor.
4

Knock Sensor Bolts

M8 (Estimate)
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Estimated value, verify specification in the BMW service manual.
5

Oil Filter Housing Bolts

M8 or M10 (Estimate)
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value, verify specific bolt size. Torque evenly to prevent leaks.
6

Oil Drain Plug

M12 or M14 (Estimate)
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Estimated value, verify exact size. Always use a new crush washer.

Connecting Rods

Specifications for components related to the connecting rods.

1

Connecting Rod Nuts

M8-M10 (Estimate)
Torque Value
38 ft-lbs (51 N·m)
Important Notes
Estimated Value, always verify specification. Torque evenly and use new nuts if possible.

Intake System

Specifications for components related to the intake system, including the manifold and throttle body.

1

Intake Manifold Bolts

M6 or M8 (Estimate)
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Estimated value, verify specific size. Torque evenly to prevent leaks.
2

Throttle Body Bolts

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Torque bolts evenly. Do not over-tighten.
3

Fuel Rail Bolts

M6 (Estimate)
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Estimated value, verify specific size and torque specifications.
4

Fuel Injector Bolts

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten; could damage the fuel injector.

Exhaust System

Specifications for components related to the exhaust system, including the manifold and headers.

1

Exhaust Manifold/Headers Bolts

M8 (Estimate)
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Estimated value, verify size. Torque bolts evenly and use new gaskets if necessary. Use anti-seize on the threads.
2

Exhaust Manifold/Headers to Cylinder Head Bolts/Studs

M8 (Estimate)
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Estimated value, torque evenly.

Cooling System

Specifications for components related to the engine cooling system.

1

Water Pump Bolts

M6 or M8 (Estimate)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated value, verify size. Torque evenly to prevent leaks.
2

Water Pump Pulley Bolts

M6 (Estimate)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated value, verify size and torque specification.
3

Thermostat Housing Bolts

M6 or M8 (Estimate)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated value, verify bolt size. Torque evenly to prevent leaks.
4

Coolant Temperature Sensor Bolt/Retainer

M6 (Estimate)
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Estimated value, do not over-tighten; could damage the sensor.

Timing System

Specifications for components related to the engine timing system.

1

Timing Chain Tensioner Bolt

M8 (Estimate)
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Estimated value, ensure proper tensioner function and confirm torque values.
2

Timing Chain Guide Bolts

M6 (Estimate)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated value, verify specification. Do not over tighten.

Accessory Drive

Specifications for components related to the accessory drive system.

1

Belt Tensioner Pulley Bolt

M10 or M12 (Estimate)
Torque Value
38 ft-lbs (51 N·m)
Important Notes
Estimated value, verify specification in the service manual. Ensure proper belt alignment.

Other

Specifications for various components.

1

Flywheel Bolts

M10 or M12 (Estimate)
Torque Value
78 ft-lbs (105 N·m)
Important Notes
Estimated value, verify specification. Always use new bolts.
2

Oil Pan Bolts

M6 or M8 (Estimate)
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Estimated value, confirm exact torque and sequence. Do not over tighten and use new gasket.
3

Ignition Coil Bolt

M6
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Do not over-tighten; could damage the coil.
4

Oil Filter Cap

N/A (Cap, not bolt)
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Use a torque wrench on the filter cap, do not over-tighten.
5

Variable Valve Timing (VANOS) Unit Bolts/Solenoid Bolts

M8 (Estimate)
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Estimated value, confirm with the service manual, torque evenly.

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

Why is using the correct torque specifications important?

Using the correct torque specifications is crucial to ensure proper clamping force. Under-torquing can lead to loosening, leaks, and component failure. Over-torquing can damage threads, strip bolts, or cause component warping, potentially leading to serious engine damage or failure. For example, over-torquing the cylinder head bolts could cause head gasket failure, while under-torquing connecting rod bolts could result in catastrophic engine damage.

Q2

What type of torque wrench should I use for these specifications?

A calibrated torque wrench is essential. For most of these specifications, a 3/8" or 1/2" drive click-type torque wrench is suitable. Digital torque wrenches are also a good option for increased accuracy. Always ensure your torque wrench is within calibration and use the specified drive size for the bolts.

Q3

What does 'Nm' mean, and how does it relate to 'ft-lbs'?

'Nm' stands for Newton-meters, the SI unit of torque. 'ft-lbs' stands for foot-pounds, an imperial unit of torque. These are different units representing the same force. 1 Nm is approximately equal to 0.73756 ft-lbs. This means that if a torque specification is 30 Nm, that is roughly equal to 22.1 ft-lbs. Conversion is important if your torque wrench is not in the specific unit listed in the service manual.

Q4

Should I use new bolts when reassembling components?

It is often recommended to replace critical fasteners, such as cylinder head bolts and connecting rod bolts, with new ones when reassembling. Some bolts are 'torque-to-yield' (TTY), which means they are designed to stretch slightly upon installation and are therefore meant to be used only once. Reusing TTY bolts can lead to unreliable clamping forces and component failure. Consult your workshop manual to confirm which fasteners need replacing.

Q5

What is the importance of proper lubrication before torquing bolts?

Applying the correct lubricant to bolt threads and under the bolt head is very important. Unless otherwise specified in the workshop manual, fasteners need to be lubricated with engine oil on the threads to reduce friction, ensuring accurate torque application. Lubricated torque settings are different than dry ones. Not lubricating where required, or using too much lubricant can cause an incorrect torque reading, leading to either over-torquing or under-torquing. Always consult your manual.

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

Torque Wrench

A precision torque wrench for accurate bolt torque application

  • Range: 10-100 Nm
  • Accuracy: ± 2%
Learn more

Socket Set

A set of sockets for various bolt sizes

  • Sizes: 10mm, 12mm, 14mm
  • Material: Chrome Vanadium
Learn more

Breaker Bar

A long breaker bar for increased leverage

  • Length: 24 inches
  • Material: Steel
Learn more
Service Procedures

Engine Oil Pan Bolt Torque Specification

Procedure for tightening engine oil pan bolts

  • Remove oil pan
  • Clean bolt threads
  • Apply threadlocker
  • Tighten bolts in sequence to 30 Nm + 90°
View full procedure

Cylinder Head Bolt Torque Specification

Procedure for tightening cylinder head bolts

  • Remove cylinder head
  • Clean bolt threads
  • Apply threadlocker
  • Tighten bolts in sequence to 40 Nm + 120°
View full procedure
Technical Service Bulletins

Engine Oil Leak Due to Loose Oil Pan Bolts

2008-02-15

Technical bulletin regarding engine oil leaks caused by loose oil pan bolts

2007-2010 BMW M3 (E90/E92)

Resolution: Tighten oil pan bolts to 30 Nm + 90° and inspect for any signs of damage

Cylinder Head Bolt Failure Due to Over-Tightening

2011-05-01

Technical bulletin regarding cylinder head bolt failure caused by over-tightening

2011-2013 BMW M3 (E90/E92)

Resolution: Replace cylinder head bolts and tighten to 40 Nm + 120°

About the Author

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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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