BMW X5 2013-2018 4.4L Engine Bolt Torque Specifications & Fastener Values
BMW X5 2013-2018

BMW X5 2013-2018 4.4L Engine Bolt Torque Specifications

Comprehensive torque specifications for various bolts on the 4.4L engine found in the 2013-2018 BMW X5 (F15) generation.

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

Fasteners associated with the cylinder head, including bolts securing the head to the block and camshaft components.

1

Cylinder Head Bolts

M12 x 1.75
Important Notes
Torque-to-yield procedure. Initial torque followed by two angle tightening steps. Ensure proper sequence is followed. Values estimated from similar engines.
2

Camshaft Bearing Cap Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Tighten in a sequence from the center outwards to avoid distorting the bearing caps. Estimated value based on similar M8 bolts.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
19 ft-lbs (26 N·m)
Important Notes
Ensure proper rocker arm alignment before tightening.

Engine Block

Fasteners securing the main engine block components.

1

Main Bearing Bolts

M14 x 2.0
Important Notes
Initial torque followed by angle tightening. Use proper sequence. Values estimated based on similar M14 bolts.
2

Connecting Rod Nuts

M10 x 1.5
Important Notes
Initial torque followed by angle tightening. Use proper sequence. Values estimated based on similar M10 bolts.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Tighten evenly in a cross pattern to prevent leaks.
4

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Use a new crush washer for proper seal.
5

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper alignment of the housing.

Crankshaft And Flywheel

Fasteners associated with the crankshaft, flywheel, and related components.

1

Flywheel Bolts

M12 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Tighten in a star pattern.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Use a new bolt if specified by the manufacturer.

Timing System

Fasteners related to the timing system components.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Ensure proper tensioner alignment before tightening.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Ensure proper camshaft alignment and timing before tightening.
3

Variable Valve Timing (VVT) Solenoid/Actuator Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly to avoid leaks.

Intake System

Fasteners associated with the intake system components.

1

Intake Manifold Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten in a cross pattern to ensure a good seal.
2

Throttle Body Bolts

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

Intake Manifold Runner/DISA Valve Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly to ensure proper sealing.
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper fuel rail alignment before tightening.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure injectors are properly seated.

Exhaust System

Fasteners associated with the exhaust manifolds/headers.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
26 ft-lbs (35 N·m)
Important Notes
Tighten in a sequence from the center outwards to ensure even pressure.

Cooling System

Fasteners associated with cooling system components.

1

Water Pump Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper water pump alignment before tightening.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper pulley alignment before tightening.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Ensure proper housing alignment before tightening to avoid leaks.

Electrical And Sensors

Fasteners for various sensors and electrical components.

1

Spark Plugs

M14 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Use a spark plug socket to ensure correct torque.
2

Ignition Coil Bolt

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten until snug.
3

Engine Coolant Temperature Sensor

M10 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten; use a proper fitting socket.
4

Knock Sensor Torque

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten, it could damage the sensor. Estimated based on similar M8 bolts.
5

Oil Pressure Sensor Torque

M10 x 1.0
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Do not overtighten to avoid damage. Estimated based on similar sensors.

Valve Cover

Fasteners associated with the valve cover.

1

Valve Cover Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten evenly in a cross pattern to avoid leaks.

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 are correct torque specifications crucial for the 4.4L engine?

Correct torque specifications ensure proper clamping force, preventing leaks, gasket failure, and component damage. Under-torquing can lead to loose connections and leaks, while over-torquing can strip threads or damage components. For example, incorrect torque on the cylinder head bolts can lead to compression loss and engine damage. Following the specified torques ensures the 4.4L engine operates as intended and provides longevity.

Q2

What happens if I don't have a torque wrench?

While it's possible to attempt tightening bolts without a torque wrench, it's highly discouraged for critical engine components. 'Feel' or guesswork is unreliable and can lead to either undertorquing or overtorquing. This can cause severe issues such as leaks, component failure, or even catastrophic engine damage. Renting or purchasing a torque wrench is essential for proper maintenance and repair of the 4.4L BMW engine.

Q3

Should I use new bolts when working on the 4.4L engine?

In many cases, yes. Especially for critical fasteners like cylinder head bolts and connecting rod bolts, BMW often recommends using new bolts. These bolts may be designed to stretch slightly upon tightening and lose their clamping force if reused. Reusing torque-to-yield bolts can lead to a loss of proper clamping pressure. Refer to the BMW repair manual for specific bolt replacement recommendations.

Q4

What's the difference between torque-to-yield and standard torque specifications?

Torque-to-yield (TTY) bolts are designed to stretch during tightening to achieve optimal clamping force. They are tightened to a specified torque value, and then further tightened by a specific angle. These bolts are generally single-use. Standard torque specifications just refer to a single torque value, which can be measured using a typical torque wrench. The 4.4L engine might have both bolt types, and understanding which is which is critical for assembly.

Q5

How often should I check the torque on the engine components?

Generally, once the components are properly installed to the correct torque specs, there is no need for periodic checks. However, if you are installing a component as part of a repair or rebuild, it's advisable to recheck torque after a short drive cycle (after the engine reaches operating temperature). Also, any time a component is disassembled for maintenance it is critical to re-torque bolts to spec during reassembly. Refer to the service manual for specific recommendations.

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 inch Drive)

A calibrated torque wrench capable of measuring torque in Newton-meters (Nm) and foot-pounds (ft-lbs) is essential for accurate bolt tightening.

  • Adjustable torque range
  • Click-type or digital readout
  • 1/2 inch drive for larger fasteners
Learn more

Torque Wrench (3/8 inch Drive)

A calibrated torque wrench, usually 3/8 inch drive, is necessary for smaller fasteners with lower torque values.

  • Adjustable torque range
  • Click-type or digital readout
  • 3/8 inch drive for smaller fasteners
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets, including deep sockets, to accommodate various bolt head sizes on the 4.4L engine.

  • Various sizes from 8mm to 24mm (and larger)
  • 6-point and 12-point options
  • Standard and deep lengths
Learn more

Socket Extensions

Extensions in various lengths are necessary to reach recessed or hard-to-access bolts within the engine bay.

  • Various lengths to reach tight spots
  • 1/2 and 3/8 inch drive options
Learn more

Universal Joints

Universal joints allow for angled torque application when direct access is restricted.

  • 1/2 and 3/8 inch drive options
  • Flexible pivoting action
Learn more

Torx Socket Set

A set of Torx sockets is needed for specific Torx fasteners found within the engine.

  • Various sizes from T20 to T60 (and larger)
  • Standard and tamper-proof options
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure

This procedure outlines the correct sequence and torque specifications for tightening the cylinder head bolts on the 4.4L engine.

  • Clean all bolt threads and cylinder head mating surfaces.
  • Install new cylinder head bolts.
  • Tighten all bolts in the specified sequence to the first torque stage (e.g., 40 Nm).
  • Tighten all bolts in the specified sequence to the second torque stage (e.g., 70 Nm).
  • Tighten all bolts in the specified sequence to the final angle stage (e.g., + 90 Degrees).
  • Consult the specific repair manual for correct torque values and tightening sequence for the specific engine variant.
View full procedure

Main Bearing Cap Bolt Tightening Procedure

This procedure details the correct method for tightening the main bearing cap bolts, ensuring proper crankshaft support.

  • Clean all bolt threads and bearing cap mating surfaces.
  • Install new main bearing cap bolts.
  • Tighten all bolts in the specified sequence to the first torque stage (e.g., 20 Nm).
  • Tighten all bolts in the specified sequence to the second torque stage (e.g., 50 Nm).
  • Tighten all bolts in the specified sequence to the final angle stage (e.g., + 70 Degrees).
  • Consult the specific repair manual for correct torque values and tightening sequence for the specific engine variant.
View full procedure

Connecting Rod Bolt Tightening Procedure

This procedure details the correct method for tightening the connecting rod cap bolts, ensuring proper piston and crankshaft connection.

  • Clean all bolt threads and connecting rod mating surfaces.
  • Install new connecting rod bolts.
  • Tighten all bolts in the specified sequence to the first torque stage (e.g., 20 Nm).
  • Tighten all bolts in the specified sequence to the final angle stage (e.g., + 60 Degrees).
  • Consult the specific repair manual for correct torque values and tightening sequence for the specific engine variant.
View full procedure

Intake Manifold Bolt Tightening Procedure

This procedure details the correct method for tightening the intake manifold bolts, ensuring a proper seal.

  • Clean all bolt threads and manifold mating surfaces.
  • Install the intake manifold and hand tighten the bolts.
  • Tighten all bolts in the specified sequence to the correct torque stage (e.g., 22 Nm).
  • Consult the specific repair manual for correct torque values and tightening sequence for the specific engine variant.
View full procedure

Exhaust Manifold Bolt Tightening Procedure

This procedure details the correct method for tightening the exhaust manifold bolts, ensuring a proper seal.

  • Clean all bolt threads and manifold mating surfaces.
  • Install the exhaust manifold and hand tighten the bolts.
  • Tighten all bolts in the specified sequence to the correct torque stage (e.g., 24 Nm).
  • Consult the specific repair manual for correct torque values and tightening sequence for the specific engine variant.
View full procedure
Technical Service Bulletins

SI B11 03 17: Engine Oil Leak at Cylinder Head/Block Interface

2017-03-15

This bulletin addresses reports of oil leaks originating from the cylinder head/block interface on N63TU engines. Incorrect cylinder head bolt torque or re-use of bolts can be a cause.

2013-2018 BMW X5 (with N63TU 4.4L engine)

Resolution: Inspect cylinder head mating surfaces, ensure proper cleaning and use new bolts during reassembly. Tighten head bolts to specified torque and angle values according to repair manual.

SI B12 01 15: Connecting Rod Bolt Failure

2015-01-10

This bulletin addresses cases of connecting rod bolt failure or loosening that have led to engine damage. It advises strict adherence to the proper torque specifications and replacement procedures. Improper reuse can cause bolt failure.

2013-2017 BMW X5 (with N63 4.4L engine)

Resolution: Always replace connecting rod bolts. Tighten to the specified torque and angle according to the repair manual. Never re-use connecting rod bolts.

SI B11 01 19: Camshaft Bearing Cap Bolt Torque

2019-01-28

This bulletin provides clarification on the correct torque specifications for camshaft bearing cap bolts. Improper torque can result in damage to the camshaft or cylinder head.

2013-2018 BMW X5 (with N63TU and N63 4.4L engine)

Resolution: Follow the specified torque sequence and values for camshaft bearing cap bolts. Check the repair manual for updated specifications.

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.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

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.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 BMW Specs. All rights reserved.

Privacy Policy Terms of Service