Mercedes-Benz Mercedes Sprinter 2006-2018 Drivetrain Bolt Torque Specifications & Fastener Values
Mercedes-Benz Mercedes Sprinter 2006-2018

Mercedes-Benz Mercedes Sprinter 2006-2018 Drivetrain Bolt Torque Specifications

Detailed torque specifications for drivetrain bolts in the 2006-2018 Mercedes Sprinter, including engine, transmission, and axle 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

Engine

Bolt torque specifications for engine components, including flywheel, main bearings, and connecting rods.

1

Flywheel Bolts

M12 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Proper torque is essential to prevent damage to the engine and transmission.
2

Main Bearing Bolts

M10 x 1.25
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Proper torque ensures the bearings are securely fastened and prevents engine damage.
3

Connecting Rod Nuts

M8 x 1.25
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Proper torque is necessary to maintain engine performance and prevent damage.

Transmission

Bolt torque specifications for transmission components, including transmission mounting bolts, oil pan bolts, and drain and fill plugs.

1

Transmission Mounting Bolts

M14 x 1.5
Torque Value
40 ft-lbs (54 N·m)
Important Notes
Proper torque is necessary to maintain transmission alignment and prevent damage.
2

Transmission Oil Pan Bolts

M8 x 1.25
Torque Value
7 ft-lbs (9 N·m)
Important Notes
Proper torque is necessary to prevent oil leaks and maintain transmission performance.
3

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Proper torque is necessary to prevent leaks and maintain transmission performance.

Drivetrain

Bolt torque specifications for drivetrain components, including drive axle/half shaft bolts, CV joint/axle nut, and propeller/drive shaft bolts.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
55 ft-lbs (75 N·m)
Important Notes
Proper torque is essential to maintain drivetrain performance and prevent damage.
2

CV Joint/Axle Nut

M16 x 1.5
Torque Value
140 ft-lbs (190 N·m)
Important Notes
Proper torque is necessary to maintain drivetrain performance and prevent damage.
3

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
Important Notes
Proper torque is essential to maintain drivetrain performance and prevent damage.

Differential

Bolt torque specifications for differential components, including differential cover bolts and axle shaft retaining bolts.

1

Differential Cover Bolts

M10 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Proper torque is necessary to prevent oil leaks and maintain drivetrain performance. (Estimated value)
2

Axle Shaft Retaining Bolts

M12 x 1.5
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Proper torque is necessary to maintain drivetrain performance and prevent damage. (Estimated value)

Transfer case

Bolt torque specifications for transfer case components, including transfer case mounting bolts.

1

Transfer Case Mounting Bolts

M14 x 1.5
Torque Value
45 ft-lbs (61 N·m)
Important Notes
Proper torque is necessary to maintain drivetrain performance and prevent damage. (Estimated value)

Driveshaft

Bolt torque specifications for driveshaft components, including driveshaft center bearing bolts.

1

Driveshaft Center Bearing Bolts

M10 x 1.25
Torque Value
25 ft-lbs (34 N·m)
Important Notes
Proper torque is necessary to maintain drivetrain performance and prevent damage. (Estimated value)

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 for the drivetrain bolts on a 2006-2018 Mercedes Sprinter?

The recommended torque for the drivetrain bolts varies depending on the specific component. For example, axle bolts typically require 80-100 Nm, while transmission bolts may need 50-70 Nm. Always refer to the manufacturer's service manual for precise values.

Q2

How often should drivetrain bolts be checked for proper torque?

Drivetrain bolts should be checked every 10,000 miles or after significant maintenance work, such as transmission or axle repairs. Regular inspections ensure bolt integrity and prevent drivetrain failures.

Q3

Can over-torquing drivetrain bolts cause damage?

Yes, over-torquing can lead to bolt stretching, thread damage, or component warping. Under-torquing can cause bolts to loosen, leading to vibration and potential drivetrain failure. Always use a calibrated torque wrench.

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

Precision tool for applying specific torque values to drivetrain bolts

  • Adjustable torque settings
  • Digital torque display
Learn more

Socket Set

Set of sockets for accessing drivetrain bolts

  • Various sizes for different bolts
  • Durable construction
Learn more
Service Procedures

Drivetrain Bolt Torque Application

Procedure for correctly torqueing drivetrain bolts on Mercedes Sprinter 2006-2018

  • Identify the specific torque value for each bolt from the manufacturer's specifications
  • Use the torque wrench to apply the specified torque value, ensuring even pressure
View full procedure

Drivetrain Bolt Inspection

Procedure for inspecting the torque of drivetrain bolts

  • Check each bolt for proper torque using the torque wrench
  • Re-torque any bolts that are not within specification
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specifications Update

2015-06-01

Updated torque specifications for drivetrain bolts on Mercedes Sprinter models

2006-2018

Resolution: Apply updated torque values as specified in the bulletin

Drivetrain Bolt Failure Report

2017-09-15

Report of drivetrain bolt failures due to improper torque application

2006-2018

Resolution: Ensure all drivetrain bolts are torqued to manufacturer's specifications and inspected regularly

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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