Volvo Volvo S90 2016-present Drivetrain Bolt Torque Specifications & Fastener Values
Volvo Volvo S90 2016-present

Volvo Volvo S90 2016-present Drivetrain Bolt Torque Specifications

Comprehensive torque specifications for the drivetrain bolts of the 2016-Present Volvo S90. Includes details for engine, transmission, driveshaft, and axle 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 block and crankshaft

Components that secure the engine block and crankshaft, including flywheel, main bearings, and connecting rods.

1

Flywheel Bolts

M12 x 1.5
Torque Value
58 ft-lbs (78 N·m)
Important Notes
Proper torque is essential to prevent damage to the flywheel, crankshaft, and transmission.
2

Main Bearing Bolts

M10 x 1.25
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Proper torque ensures the bearings are securely fastened and prevents engine damage.
3

Connecting Rod Nuts

M12 x 1.5
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Proper torque is crucial to maintain the integrity of the engine's internal components.

Crankshaft and pulley

Components that secure the crankshaft pulley and harmonic balancer.

1

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Value
221 ft-lbs (300 N·m)
Important Notes
Proper torque is essential to maintain the engine's timing and prevent damage to the serpentine belt.

Transmission and mounting

Components that secure the transmission to the engine and chassis.

1

Transmission Mounting Bolts

M14 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.
2

Engine Block to Transmission Bellhousing Bolts

M12 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Proper torque is essential to maintain the engine's alignment and prevent damage to the transmission.
3

Transmission Crossmember Bolts

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures the transmission is properly supported and aligned.

Transmission oil pan and drain/fill plug

Components that secure the transmission oil pan and drain/fill plug.

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Value
80 in-lbs (9 N·m)
Important Notes
Proper torque prevents oil leaks and ensures the transmission's lubrication system functions correctly.
2

Differential Drain/Fill Plug

M12 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Proper torque prevents leaks and ensures the differential's lubrication system functions correctly.

Drive axle and half shaft

Components that secure the drive axle and half shaft to the transmission and differential.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
59 ft-lbs (80 N·m)
Important Notes
Proper torque ensures the axles are properly aligned and supported.
2

CV Joint/Axle Nut

M16 x 1.5
Torque Value
148 ft-lbs (200 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and prevents damage to the axle and wheel bearings.

Propeller/drive shaft and differential cover

Components that secure the propeller/drive shaft and differential cover.

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Value
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the drive shaft is properly aligned and supported.
2

Differential Cover Bolts

M10 x 1.25
Torque Value
30 ft-lbs (40 N·m)
Important Notes
Proper torque prevents oil leaks and ensures the differential's lubrication system functions correctly.

Axle shaft to hub

Components that secure the axle shaft to the hub.

1

Axle Shaft to Hub Bolts

M14 x 1.5
Torque Value
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures the axle shaft is properly seated and prevents damage to the wheel bearings.

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 2016-Present Volvo S90?

The recommended torque for drivetrain bolts on the 2016-Present Volvo S90 varies by specific component. For example, the axle nut typically requires 200-250 Nm, while transmission mounting bolts may require 40-60 Nm. Always refer to the official Volvo service manual for precise specifications.

Q2

How often should I check the torque on drivetrain components?

It's advisable to check the torque on drivetrain components during routine maintenance or after any work involving the drivetrain. For example, after replacing a driveshaft or servicing the transmission, re-torqueing ensures all components are securely fastened and reduces the risk of loosening due to vibrations.

Q3

Can I use a standard torque wrench for drivetrain bolts?

Yes, a high-quality torque wrench is essential for accurate torque application. Ensure the wrench is calibrated and capable of measuring the required torque range. For higher torque specifications (e.g., axle nuts), a breaker bar might be necessary initially, followed by a torque wrench for precision.

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 specific torque values to drivetrain bolts.

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

Torque Angle Gauge

Used to measure the angle of rotation during bolt tightening, ensuring proper tension.

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

Socket Set

A set of sockets to fit various drivetrain bolt sizes.

  • Includes both metric and standard sizes
  • Durable chrome-vanadium construction
Learn more
Service Procedures

Driveshaft Bolt Torque Procedure

Step-by-step guide for torquing driveshaft bolts on the 2016-Present Volvo S90.

  • Raise the vehicle and secure it on a lift or jack stands.
  • Locate the driveshaft bolts on the drivetrain assembly.
  • Clean the bolt threads to ensure accurate torque application.
  • Using a torque wrench, tighten the bolts to the specified torque value (refer to the service manual).
  • Use a torque angle gauge to ensure proper bolt rotation if required.
View full procedure

Transmission Mount Bolt Torque Procedure

Procedure for applying torque to transmission mount bolts.

  • Access the transmission mount bolts by removing necessary components.
  • Inspect the bolts for wear or damage and replace if necessary.
  • Apply thread locker to the bolt threads if specified in the service manual.
  • Tighten the bolts to the specified torque value using a torque wrench.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2022-05-15

Updated torque specifications for drivetrain bolts to address potential loosening issues.

2016-Present Volvo S90

Resolution: Ensure all drivetrain bolts are torqued to the updated specifications listed in the service manual.

Driveshaft Bolt Failure Investigation

2021-11-20

Investigation into premature driveshaft bolt failures in certain models.

2016-2020 Volvo S90

Resolution: Replace affected bolts with updated parts and torque to the revised specifications.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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