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

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

Detailed torque specifications for the drivetrain bolts of the 2018-Present Mercedes-Benz Sprinter, including transmission, driveshaft, and differential bolts.

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 To Transmission

Bolts securing the engine block to the transmission bellhousing, ensuring proper alignment and support.

1

Engine Block to Transmission Bellhousing Bolts

M14 x 1.5
Torque Value
70 ft-lbs (95 N·m)
Important Notes
Estimated value, consult vehicle's service manual for specific torque values.

Transmission Mounting

Bolts securing the transmission to the engine block or transmission crossmember, ensuring proper alignment and support.

1

Transmission Mounting Bolts

M12 x 1.5
Torque Value
44 ft-lbs (60 N·m)
2

Transmission Crossmember Bolts

M16 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Estimated value, consult vehicle's service manual for specific torque values.

Transmission Oil Pan

Bolts securing the oil pan to the transmission case, ensuring proper sealing and lubrication system maintenance.

1

Transmission Oil Pan Bolts

M10 x 1.5
Torque Value
71 ft-lbs (96 N·m)

Drive Axle Half Shaft

Bolts securing the axle shafts to the transmission or differential, ensuring proper seating and rotational energy transfer.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
44 ft-lbs (60 N·m)
2

Axle Shaft to Hub Bolts

M18 x 1.5
Torque Value
120 ft-lbs (163 N·m)
Important Notes
Estimated value, consult vehicle's service manual for specific torque values.

Cv Joint Axle Nut

Nut securing the CV joint to the axle shaft, ensuring proper seating and rotational energy transfer.

1

CV Joint/Axle Nut

M20 x 1.5
Torque Value
180 ft-lbs (245 N·m)

Propeller Drive Shaft

Bolts securing the drive shaft to the transmission or differential, ensuring proper seating and rotational energy transfer.

1

Propeller/Drive Shaft Bolts

M12 x 1.5
Torque Value
26 ft-lbs (35 N·m)

Starter Motor Mounting

Bolts securing the starter motor to the engine block or transmission bellhousing, ensuring proper alignment and support.

1

Starter Motor Mounting Bolts

M10 x 1.5
Torque Value
44 ft-lbs (60 N·m)

Fluid Drain Fill Plugs

Plugs securing the transmission and differential fluid reservoirs, ensuring proper sealing and lubrication system maintenance.

1

Transmission Fluid Drain/Fill Plug

M12 x 1.5
Torque Value
29 ft-lbs (40 N·m)
2

Differential Drain/Fill Plug

M14 x 1.5
Torque Value
44 ft-lbs (60 N·m)

Differential Mounting

Bolts securing the differential to the vehicle's frame or suspension components, ensuring proper support and alignment.

1

Differential Mounting Bolts

M16 x 1.5
Torque Value
85 ft-lbs (115 N·m)
Important Notes
Estimated value, consult vehicle's service manual for specific torque values.

Flywheel

Bolts securing the flywheel to the crankshaft, ensuring proper seating and rotational energy transfer.

1

Flywheel Bolts

M14 x 1.5
Torque Value
44 ft-lbs (60 N·m)

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 are the torque specifications for the drivetrain bolts on a 2018-Present Mercedes Sprinter?

The torque specifications for the drivetrain bolts vary depending on the specific component. For example, the driveshaft flange bolts typically require 50 Nm (37 lb-ft), while the transmission mount bolts may require 80 Nm (59 lb-ft). Always refer to the official Mercedes-Benz service manual for your specific model and year to ensure accuracy.

Q2

How often should I check the torque on drivetrain bolts?

It is recommended to check the torque on drivetrain bolts during routine maintenance intervals, such as every 20,000 miles or as specified in your vehicle's maintenance schedule. Additionally, inspect the bolts after any significant impact or vibration, such as off-road driving or towing heavy loads.

Q3

Can I reuse drivetrain bolts after removal?

Reusing drivetrain bolts is generally not recommended, as they are often designed for single use and may lose their tensile strength after being torqued. Always replace bolts with new ones that meet the manufacturer's specifications to ensure proper clamping force and safety.

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

Digital Torque Wrench

A precision tool for applying accurate torque to drivetrain bolts.

  • Adjustable torque settings
  • Digital display for precise readings
Learn more

Torque Angle Gauge

Used to measure the angle of rotation when tightening bolts to ensure proper torque.

  • Magnetic base for easy attachment
  • Clear angle markings
Learn more

Thread Locking Compound

A chemical adhesive used to secure bolts and prevent loosening due to vibration.

  • High-strength formula
  • Resistant to heat and chemicals
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Step-by-step guide to properly torque the driveshaft bolts on a 2018-Present Mercedes Sprinter.

  • Raise the vehicle and secure it on a lift or jack stands.
  • Remove the driveshaft bolts using a suitable socket and wrench.
  • Clean the bolt threads and apply thread locking compound.
  • Reinstall the bolts and tighten them to the specified torque using a digital torque wrench.
  • Use a torque angle gauge to ensure the bolts are tightened to the correct angle.
View full procedure

Transmission Mount Bolt Torque Procedure

Detailed instructions for torquing the transmission mount bolts on a 2018-Present Mercedes Sprinter.

  • Locate the transmission mount bolts on the underside of the vehicle.
  • Loosen the bolts using a wrench or socket.
  • Tighten the bolts to the manufacturer's specified torque using a digital torque wrench.
  • Verify the torque with a torque angle gauge if required.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Loosening Issue

2021-05-15

Reports of drivetrain bolts loosening over time due to insufficient torque or lack of thread locking compound.

2018-2023 Mercedes Sprinter

Resolution: Ensure all drivetrain bolts are torqued to the manufacturer's specifications and apply thread locking compound during installation.

Incorrect Torque Specifications in Manual

2020-08-10

Some service manuals for the 2018-Present Mercedes Sprinter contain incorrect torque specifications for drivetrain components.

2018-2022 Mercedes Sprinter

Resolution: Refer to the latest technical service bulletin or contact Mercedes-Benz for updated torque specifications.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

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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