BMW X5 2007-2013 4.8l-engine Bolt Torque Specifications & Fastener Values
BMW X5 2007-2013

BMW X5 2007-2013 4.8l-engine Bolt Torque Specifications

Comprehensive guide to torque specifications for bolts on the 4.8L engine in the 2007-2013 BMW X5, including cylinder head bolts, main bearing bolts, connecting rod bolts, and more.

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

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Cylinder Head

Specifications for components related to the cylinder head, including the head itself, valve covers, and related components. Proper torque is crucial for sealing and preventing leaks.

1

Cylinder Head Bolts

M12 x 1.5
Important Notes
Cylinder head bolts are torque-to-yield; replace upon removal. Tighten in sequence according to the manufacturer's procedure. Torque values are estimated based on common specifications and may vary. Check the BMW TIS for the specific sequence and angle-tightening values.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure on the gasket.
3

Cylinder Head Cover Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure on the gasket.
4

Rocker Arm/Shaft Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure proper rocker arm alignment before tightening.
5

VANOS Solenoid Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damage to the solenoid housing.
6

Camshaft Position Sensor Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the sensor.

Engine Block

Specifications for the main engine block, including the crankshaft, pistons, and oil pan. Accurate torque is vital for engine integrity and proper function.

1

Main Bearing Bolts

M12 x 1.5
Important Notes
Main bearing bolts are torque-to-yield; replace upon removal. Tighten in sequence according to the manufacturer's procedure. Check BMW TIS for final angle.
2

Connecting Rod Nuts

M9 x 1.25
Important Notes
Connecting rod nuts are torque-to-yield; replace upon removal. Tighten in sequence according to the manufacturer's procedure. Check BMW TIS for final angle.
3

Oil Pan Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing of the oil pan gasket.
4

Crankshaft Position Sensor Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the sensor.
5

Knock Sensor Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure sensor is properly seated before tightening.

Timing System

Specifications for components related to the timing system, ensuring proper valve timing. Accurate torque is crucial to prevent engine damage and timing issues.

1

Timing Belt/Chain Tensioner Bolt

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure tensioner is properly positioned before tightening. Use a new tensioner if needed.
2

Camshaft Sprocket Bolt

M10 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Ensure correct alignment of the camshaft sprockets. Use a camshaft holding tool as required.

Crankshaft And Flywheel

Specifications for components related to the crankshaft, flywheel, and harmonic balancer. Proper torque is crucial for power transmission and vibration control.

1

Flywheel Bolts

M12 x 1.5
Important Notes
Flywheel bolts are torque-to-yield; replace upon removal. Tighten in a star pattern, consult BMW TIS for the specific pattern.
2

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Ensure the pulley is fully seated against the crankshaft. Use a crankshaft holding tool to prevent rotation.

Intake System

Specifications for the intake manifold, throttle body, and related sensors. Proper torque is crucial for a leak-free intake system.

1

Throttle Body Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
Tighten carefully to avoid damaging the throttle body.
2

Intake Manifold Bolts

M8 x 1.25
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure on the gasket.
3

Intake Air Temperature Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the sensor.

Exhaust System

Specifications for exhaust manifold/headers. Proper torque is critical to prevent exhaust leaks.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten in a sequence starting from the center out, to avoid manifold warpage.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Tighten in a sequence starting from the center out, to avoid manifold warpage.
3

EGR Valve Bolts

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure EGR valve is properly positioned before tightening.

Fuel System

Specifications for the fuel rail, injectors, and related components. Proper torque is crucial for a leak-free and efficient fuel system.

1

Fuel Rail Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure fuel rail is properly seated before tightening. Use care when working with fuel system components.
2

Fuel Injector Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the injectors.

Cooling System

Specifications for the water pump, thermostat housing, and related components. Proper torque is vital to prevent leaks and ensure proper coolant circulation.

1

Water Pump Bolts

M8 x 1.25
Torque Value
11 ft-lbs (15 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even pressure on the gasket.
2

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure proper alignment of the pulley before tightening.
3

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the thermostat housing.
4

Coolant Temperature Sensor Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the sensor.

Accessory Drive

Specifications for belt tensioners and idler pulleys. Proper torque is crucial to maintain proper belt tension and prevent slippage.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the tensioner is properly positioned before tightening.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the idler pulley is properly positioned before tightening.

Lubrication System

Specifications for components related to engine lubrication, ensuring a leak-free system. Proper torque is crucial to prevent oil leaks and maintain proper oil pressure.

1

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the oil filter housing is properly seated before tightening. Use a new o-ring/seal if needed.
2

Oil Drain Plug Bolt

M12 x 1.5
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Use a new sealing washer with each installation. Do not overtighten.

Ignition System

Specifications for components related to the ignition system. Proper torque is crucial for proper electrical connections and spark plug function.

1

Spark Plugs

M14 x 1.25
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Use a calibrated torque wrench to ensure proper heat transfer between the spark plug and the cylinder head. Check BMW TIS for specific installation procedures
2

Ignition Coil Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten carefully to ensure proper coil contact and avoid damaging the coil housing.

Other

Specifications for other miscellaneous components. Proper torque is crucial for proper functioning of these various systems.

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure fuel filter assembly is secure.
2

Power Steering Pump Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Ensure the power steering pump is properly aligned before tightening.
3

PCV Valve Bolt

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten carefully to avoid damaging the PCV valve.

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 torque specifications important for my 4.8L BMW X5 engine?

Correct torque specifications ensure proper clamping force, preventing leaks, component failure, and damage to threads. Over-tightening can lead to stripped threads or broken bolts, while under-tightening can cause leaks or parts to come loose. For example, the cylinder head bolts, if not torqued correctly, can cause head gasket failure and major engine damage.

Q2

What type of torque wrench should I use?

A calibrated torque wrench is essential for accurate torque application. Both click-type and digital torque wrenches are suitable. For higher-torque applications on the 4.8L engine, like the crankshaft pulley bolt, a higher range wrench is required (typically around 200-300 Nm). Ensure the wrench's calibration is recent.

Q3

Should I use new bolts when working on my 4.8L engine?

In many cases, yes. Especially for torque-to-yield bolts like cylinder head bolts, and connecting rod bolts. These bolts are designed to stretch upon reaching a certain torque and should not be reused as their yield point may have been exceeded. Failure to use new bolts could compromise clamping force and lead to engine damage. For example, reusing old connecting rod bolts can lead to a catastrophic engine failure.

Q4

Do I need to use Loctite or other threadlocker compounds on engine bolts?

It depends on the specific bolt and application. Some bolts, like those for the intake manifold, may require a threadlocker to prevent loosening due to vibration and heat. Check the BMW repair manual or specific procedures for guidance on the 4.8L engine. Always use the recommended threadlocker type (e.g., blue Loctite for medium strength, red for high strength if required).

Q5

What if I don't have the exact torque spec for a particular bolt on my 4.8L engine?

It is highly recommended to use the manufacturer's torque specifications. If you are missing a specification, consult the official BMW repair manual, a reputable online database, or a BMW technician for accurate figures. Guessing or using generalized torque specs could lead to serious problems. For instance, over torquing the VANOS unit bolts can damage the unit.

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 1/2" drive torque wrench is essential for accurately tightening bolts to the manufacturer's specifications. It is vital for preventing over- or under-tightening, which can cause damage.

  • Accurate torque measurement
  • Durable construction
  • Wide torque range
Learn more

Torque Wrench (3/8" Drive)

A 3/8" drive torque wrench is helpful for smaller bolts and fasteners, where a 1/2" drive might be too bulky or provide insufficient control.

  • Accurate torque measurement
  • Compact size
  • Suitable for lower torque applications
Learn more

Socket Set (Metric)

A complete metric socket set, both standard and deep well sockets, is required for accessing various bolt heads on the 4.8L engine.

  • Comprehensive range of sizes
  • Durable construction
  • Variety of socket depths
Learn more

Extension Bars (Various Lengths)

Extension bars are used to reach bolts that are positioned in hard-to-access locations within the engine bay.

  • Various lengths for versatility
  • Durable construction
  • Provides extended reach
Learn more

Universal Joint

A universal joint helps to torque fasteners at an angle

  • Swiveling joint
  • Durable construction
  • Assists with hard-to-reach fasteners
Learn more
Service Procedures

Cylinder Head Bolt Tightening Procedure (4.8L N62)

This procedure outlines the correct sequence and torque specifications for tightening the cylinder head bolts on the 4.8L N62 engine.

  • Ensure the cylinder head and block surfaces are clean and free of debris.
  • Install new cylinder head bolts.
  • Tighten all bolts in sequence using the first specified torque value.
  • Tighten all bolts in sequence using the second specified torque value.
  • Tighten all bolts in sequence using the specified angle value.
  • Verify that all bolts have been tightened to specification.
View full procedure

Intake Manifold Bolt Tightening Procedure (4.8L N62)

This procedure details the steps for proper intake manifold tightening to ensure a proper seal.

  • Ensure the mating surfaces are clean and free of debris.
  • Install intake manifold with a new gasket.
  • Tighten all bolts in a criss-cross pattern to the specified torque.
  • Verify that all bolts have been tightened to specification.
View full procedure

Connecting Rod Bolt Tightening Procedure (4.8L N62)

This procedure details the steps for proper connecting rod bolt tightening to ensure proper function.

  • Ensure the connecting rod and cap surfaces are clean and free of debris.
  • Install connecting rod cap with new bolts.
  • Tighten all bolts to the specified torque value.
  • Tighten all bolts in sequence using the specified angle value.
  • Verify that all bolts have been tightened to specification.
View full procedure

Main Bearing Cap Bolt Tightening Procedure (4.8L N62)

This procedure details the steps for proper main bearing cap bolt tightening to ensure proper function.

  • Ensure the main bearing cap and engine block surfaces are clean and free of debris.
  • Install main bearing caps with new bolts.
  • Tighten all bolts to the specified torque value.
  • Tighten all bolts in sequence using the specified angle value.
  • Verify that all bolts have been tightened to specification.
View full procedure
Technical Service Bulletins

N62 Engine: Cylinder Head Bolt Re-Torque Procedure

2008-03-15

This bulletin addresses a potential issue with cylinder head bolts not maintaining proper torque over time on early production N62 engines.

2007-2008 BMW X5 4.8i

Resolution: Check torque values, and re-torque in sequence if needed. Use new bolts if bolts have stretched during prior use. Refer to torque specifications.

N62 Engine: Intake Manifold Gasket Leakage

2010-05-20

This bulletin is to address a known issue with intake manifold gaskets failing due to improper installation or over torquing.

2007-2010 BMW X5 4.8i

Resolution: Ensure mating surfaces are clean, new gasket is installed, and bolts are torqued to the correct specifications and in the correct sequence. Do not over tighten.

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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