BMW 440i 2017-present 3.0L Engine Bolt Torque Specifications & Fastener Values
BMW 440i 2017-present

BMW 440i 2017-present 3.0L Engine Bolt Torque Specifications

Comprehensive list of bolt torque specifications for the 3.0L engine found in the 2017-Present BMW 440i (F32, F33, F36) models. 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

Components related to the cylinder head, including the head bolts, camshaft components, and valve train.

1

Cylinder Head Bolts

M12 x 1.5
Important Notes
Torque in a specific sequence, following manufacturer's specifications. Final torque is achieved with two 90-degree angle torques after initial torque value is met. Lubricate bolt threads with engine oil prior to installation.
2

Camshaft Bearing Cap Bolts/Nuts

M8 x 1.25
Important Notes
Initial torque followed by an angle torque for proper camshaft alignment. Torque bolts in sequence, incrementally.
3

Rocker Arms/Shafts Bolts

M6 x 1
Torque Value
21 ft-lbs (28 N·m)
Important Notes
Ensure proper seating of rocker arms before tightening.
4

VANOS Solenoid Bolts

M6 x 1
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper seating of the solenoid before tightening.
5

Valve Cover Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Torque in a criss-cross pattern to ensure even sealing.
6

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Ensure the camshaft is properly positioned and aligned before tightening.

Engine Block

Components directly attached to or contained within the engine block.

1

Main Bearing Bolts

M12 x 1.75
Important Notes
Torque in a sequence, typically from the center outward. Initial torque followed by an angle torque. Lubricate threads with engine oil.
2

Connecting Rod Nuts

M9 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure proper seating of rod cap. Torque in sequence, incrementally.
3

Knock Sensor Bolt

M8 x 1.25
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Ensure proper sensor alignment.
4

Engine Mount Bolts (to engine block)

M12 x 1.75
Torque Value
43 ft-lbs (58 N·m)
Important Notes
Use caution to support engine during installation.
5

Oil Pan Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Torque in a criss-cross pattern to ensure even sealing.
6

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
28 ft-lbs (38 N·m)
Important Notes
Always use a new crush washer when installing.

Intake Exhaust

Components related to the intake and exhaust manifolds, and throttle body.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Torque in a criss-cross pattern, starting from the center.
2

Throttle Body Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper gasket alignment when installing the throttle body.
3

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Torque in a sequence, starting from the center and working outwards to ensure proper sealing.

Rotating Assemblies

Components directly attached to or part of the engine's rotating assemblies.

1

Flywheel Bolts

M12 x 1.5
Torque Value
58 ft-lbs (79 N·m)
Important Notes
Use a flywheel locking tool to prevent crankshaft rotation during tightening.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
110 ft-lbs (149 N·m)
Important Notes
Use a crankshaft holding tool to prevent crankshaft rotation during tightening.

Cooling System

Components related to the engine's cooling system, including water pump and thermostat.

1

Water Pump Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Torque in a criss-cross pattern to ensure even sealing.
2

Water Pump Pulley Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper pulley alignment before tightening.
3

Thermostat Housing Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper gasket alignment during installation.

Fuel System

Components related to the fuel system.

1

Fuel Injector Bolts

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure proper injector seating and alignment.

Ignition System

Components related to the engine's ignition system.

1

Spark Plugs

M14 x 1.25
Torque Value
17 ft-lbs (23 N·m)
Important Notes
Use a spark plug socket to prevent damaging the porcelain. Avoid over-tightening.
2

Ignition Coil Bolt

M6 x 1
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Ensure the coil is properly seated before tightening.

Lubrication System

Components related to the engine's lubrication system.

1

Oil Filter Cap

N/A
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Hand tighten and use a wrench to torque an additional half turn. Do not overtighten.
2

Oil Filter Housing Bolt

N/A
Torque Value
7 ft-lbs (9.5 N·m)
Important Notes
Hand tighten and use a wrench to torque an additional half turn. Do not overtighten.

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 it crucial to use the correct torque specifications?

Using the correct torque specifications ensures proper clamping force, preventing components from loosening due to vibration or thermal expansion. Under-torquing can lead to leaks and component failure, while over-torquing can damage threads, fasteners, and mating surfaces. For example, over-torquing a cylinder head bolt can cause the bolt to stretch or snap, leading to engine damage and potential coolant or oil leaks.

Q2

Do I need to use new bolts every time I remove them?

For critical components like cylinder head bolts, connecting rod bolts, and main bearing cap bolts, BMW often specifies that new, torque-to-yield (TTY) bolts be used. These bolts are designed to stretch when tightened to a specific torque, ensuring optimal clamping force. Reusing TTY bolts can result in inadequate clamping, bolt failure, or damage to your 3.0L engine. Always consult the BMW repair manual for the specific component.

Q3

What does 'torque to yield' mean?

'Torque to yield' (TTY) means the bolt is tightened to a specific torque AND then turned a specific number of degrees. This stretching of the bolt creates clamping force. TTY bolts are designed for single use. Reusing TTY bolts often results in inaccurate clamping force and can lead to bolt failure. For instance, a TTY cylinder head bolt should be replaced once it's been removed.

Q4

What should I do if I strip a bolt or thread?

If you strip a bolt head or a thread, it's essential to address it carefully. For stripped bolt heads, using a bolt extractor is recommended. For stripped threads, depending on the location and severity, options include using a thread repair kit (like Heli-Coil), re-tapping the hole to a larger size, or, in severe cases, replacing the component. Trying to force a stripped fastener will cause more damage. Example: If you strip the threads on the oil drain plug, it’s best to repair it immediately to prevent oil leaks.

Q5

Do torque specifications vary for dry vs. lubricated threads?

Yes, torque specifications can vary depending on whether the threads are dry or lubricated. Lubricants, especially oil, reduce friction when tightening fasteners, and using the dry spec with lubricated threads can result in over-torquing. For the BMW 3.0L engine, refer to the service manual for guidance on whether threads should be lubricated and which lubricant to use. Applying oil to a bolt intended for dry torque could cause it to over-tighten by 15-20%.

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 (1/2" Drive)

A high-quality torque wrench with a 1/2" drive is necessary for accurate torque application on larger fasteners.

  • Wide torque range (e.g., 20-200 ft-lbs)
  • Click-type mechanism
  • Accurate calibration
Learn more

Torque Wrench (3/8" Drive)

A torque wrench with a 3/8" drive for smaller fasteners.

  • Wide torque range (e.g., 5-80 ft-lbs)
  • Click-type mechanism
  • Accurate calibration
Learn more

Torx Socket Set

A comprehensive set of Torx sockets is essential as many fasteners on the BMW engine utilize Torx heads.

  • Variety of sizes (e.g., T10 - T60)
  • Durable construction
  • Commonly used in BMW engines
Learn more

Standard Socket Set

A comprehensive set of standard metric sockets for bolts and nuts on the 3.0L engine.

  • Variety of sizes (e.g., 8mm-22mm)
  • Deep and shallow sockets
  • Durable construction
Learn more

Extension Bars

Various length extension bars will help access hard-to-reach fasteners on the engine.

  • 1/2" and 3/8" drive compatibility
  • Various lengths (e.g., 3", 6", 10")
  • Durable construction
Learn more

Universal Joint

A universal joint adapter to access fasteners at awkward angles.

  • 1/2" and 3/8" drive compatibility
  • Durable construction
  • Flexibility for angled fasteners
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure

Procedure for correctly torquing the cylinder head bolts on the B58 3.0L engine.

  • Clean all mating surfaces.
  • Install new head gasket.
  • Install cylinder head.
  • Hand tighten all cylinder head bolts.
  • Torque all bolts to 30 Nm (22 ft-lbs) in sequence.
  • Torque all bolts to 70 Nm (52 ft-lbs) in sequence.
  • Tighten all bolts by 90 degrees in sequence.
  • Tighten all bolts by a further 90 degrees in sequence.
View full procedure

Engine Oil Pan Bolt Torque Procedure

Procedure for torquing the bolts securing the oil pan to the engine block on the B58 3.0L engine.

  • Clean all mating surfaces of the oil pan and engine block.
  • Install new oil pan gasket.
  • Install oil pan.
  • Hand tighten all bolts.
  • Torque all oil pan bolts to 10 Nm (7.4 ft-lbs) in a cross pattern.
View full procedure

Connecting Rod Bolt Torque Procedure

Procedure for correctly torquing the connecting rod bolts on the B58 3.0L engine.

  • Clean all mating surfaces.
  • Install connecting rod bearing shells.
  • Install connecting rod and cap.
  • Hand tighten all bolts.
  • Torque all connecting rod bolts to 20 Nm (15 ft-lbs).
  • Tighten all bolts by 70 degrees.
View full procedure

Intake Manifold Bolt Torque Procedure

Procedure for correctly torquing the intake manifold bolts on the B58 3.0L engine.

  • Clean all mating surfaces.
  • Install intake manifold gasket.
  • Install intake manifold.
  • Hand tighten all bolts.
  • Torque all bolts to 10 Nm (7.4 ft-lbs) in a cross pattern.
View full procedure

Valve Cover Bolt Torque Procedure

Procedure for torquing the bolts securing the valve cover on the B58 3.0L engine.

  • Clean all mating surfaces of the valve cover and cylinder head.
  • Install new valve cover gasket.
  • Install valve cover.
  • Hand tighten all bolts.
  • Torque all valve cover bolts to 10 Nm (7.4 ft-lbs) in a cross pattern.
View full procedure
Technical Service Bulletins

Oil Leak from Valve Cover

2019-05-15

Some B58 engines may experience oil leaks from the valve cover due to gasket deformation or improper torque during initial assembly.

2017-2019 BMW 440i

Resolution: Replace the valve cover gasket and torque the valve cover bolts to the specified torque. Ensure the mating surfaces are clean and dry before reassembly.

Engine Knocking Noise on Cold Start

2020-11-20

Some B58 engines may exhibit a knocking noise upon cold start due to piston slap. This can be aggravated by improper rod bolt torquing.

2018-2020 BMW 440i

Resolution: Ensure connecting rod bolts are torqued to the correct specification with the correct angle. Replace connecting rod bolts if the noise persists.

Coolant Leak from Cylinder Head

2022-03-01

Some B58 engines may exhibit coolant leaks from the cylinder head due to improper head bolt torque or head gasket failure.

2017-2022 BMW 440i

Resolution: Inspect cylinder head and head gasket for damage. Replace the gasket if needed. Ensure cylinder head bolts are torqued to the correct specification and sequence.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

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