Volvo Vehicle Models Volvo S90 2016-present Torque Specifications
Volvo Vehicle Models Volvo S90 2016-present

Volvo Vehicle Models Volvo S90 2016-present Torque Specifications

Complete Volvo Vehicle Models Volvo S90 2016-present torque specifications guide. Includes factory-specified torque values, torque sequences, and technical specifications for all components including body, brakes, drivetrain, electrical, emissions sensors, fuel, exhaust, HVAC, and suspension. Essential information for proper assembly and maintenance.

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

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Search by component name, bolt size, or description

Torque Calculator

Convert between different torque units

2.0l Engine

Torque specifications for 2.0L Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Uniformly tighten in a crisscross pattern starting from the center outwards.

Main Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure bearings are properly seated before tightening.

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure connecting rods are properly aligned before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.75
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Ensure the flywheel is properly seated before tightening.

Oil Pan

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Use a gasket sealant if specified by the manufacturer.

Valve Cover

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use a new gasket when reinstalling the valve cover.

2.0l I4 Engine

Torque specifications for 2.0L-I4 Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
1. 22 ft-lbs (30 N·m) 2. 90°
Important Notes
Follow the manufacturer's specified torque sequence to prevent warping of the cylinder head.

Main Bearings

1

Main Bearing Bolts

M12 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure the bearing caps are properly aligned before torquing.

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Use new connecting rod nuts for reassembly.

Flywheel

1

Flywheel Bolts

M12 x 1.5
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Use thread locker on flywheel bolts.

Oil Pan

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
7 ft-lbs (9 N·m)
Important Notes
Over-torquing can damage the oil pan or gasket.

Valve Cover

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use a new valve cover gasket for reassembly.

2.0l I4 Turbo Engine

Torque specifications for 2.0L-I4-TURBO Engine

Cylinder Head

1

Cylinder Head Bolts

M10 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Uniformly tighten in a crisscross pattern starting from the center outwards.

Main Bearings

1

Main Bearing Bolts

M12 x 1.75
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure bearings are properly seated before tightening.

Connecting Rods

1

Connecting Rod Nuts

M10 x 1.25
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Ensure connecting rods are properly aligned before tightening.

Flywheel

1

Flywheel Bolts

M12 x 1.75
Torque Specification
58 ft-lbs (78 N·m)
Important Notes
Ensure the flywheel is properly seated before tightening.

Oil Pan

1

Oil Pan Bolts

M8 x 1.25
Torque Specification
6.67 ft-lbs (9 N·m)
Important Notes
Use a gasket sealant if specified by the manufacturer.

Valve Cover

1

Valve Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Use a new gasket when reinstalling the valve cover.

Body

Torque specifications for Body

Suspension And Steering

1

Wheel Lug Nuts

M12 x 1.5
Torque Specification
103 ft-lbs (140 N·m)
Important Notes
Proper torque ensures wheel alignment and safety.
2

Strut/Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
74 ft-lbs (100 N·m)
Important Notes
Proper torque ensures suspension stability and alignment.
3

Control Arm Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Proper torque maintains wheel alignment and handling.
4

Ball Joint Nut

M10 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Proper torque ensures safe steering and suspension movement.
5

Tie Rod End Nut

M8 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Proper torque ensures precise steering and alignment.
6

Sway Bar Link Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Proper torque ensures proper handling and reduces body roll.
7

Steering Gear/Rack Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Proper torque ensures precise steering and safety.

Fuel System

1

Fuel Tank Strap Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque prevents fuel tank movement or leaks.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Proper torque prevents fuel leaks and ensures a secure connection.

Safety Components

1

Seat Belt Anchorage Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque is critical for passenger safety during collisions.

Body Panels

1

Door Hinge Bolts

M6 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures proper door alignment and operation.
2

Hood Hinge Bolts

M6 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures proper hood alignment and operation.
3

Trunk Lid Hinge Bolts

M6 x 1.0
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Proper torque ensures proper trunk alignment and operation.

Bumper System

1

Bumper Reinforcement Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Proper torque ensures the bumper’s structural integrity during impacts.

Brakes

Torque specifications for Brakes

Brake Caliper System

1

Brake Caliper Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts secure the brake caliper to the caliper bracket.
2

Brake Caliper Bracket Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
These bolts attach the caliper bracket to the steering knuckle.

Brake Rotor System

1

Brake Rotor Bolts

M8 x 1.25
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
These bolts secure the brake rotor to the hub.

Brake Hydraulic System

1

Brake Line Fittings

M10 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These fittings connect the brake lines to the calipers or master cylinder. Estimated bolt size based on standard brake line fittings.

Brake Master Cylinder System

1

Brake Master Cylinder Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the master cylinder to the firewall or booster. Estimated bolt size based on typical master cylinder applications.

Brake Booster System

1

Brake Booster Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
These bolts secure the brake booster to the firewall. Estimated bolt size based on typical brake booster applications.

Brake Pedal System

1

Brake Pedal Mounting Bolts

M6 x 1.0
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
These bolts secure the brake pedal assembly to the firewall. Estimated bolt size based on typical pedal mounting applications.

Drivetrain

Torque specifications for Drivetrain

Engine Block and Crankshaft

1

Flywheel Bolts

M12 x 1.5
Torque Specification
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 Specification
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 Specification
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

1

Crankshaft Pulley/Harmonic Balancer Bolt

M16 x 1.5
Torque Specification
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

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
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 Specification
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 Specification
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

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
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 Specification
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

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Specification
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 Specification
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

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Specification
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 Specification
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

1

Axle Shaft to Hub Bolts

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

Electrical

Torque specifications for Electrical

Alternator

1

Alternator Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
2

Alternator Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry guidelines.

Starter Motor

1

Starter Motor Mounting Bolts

M12 x 1.5
Torque Specification
37 ft-lbs (50 N·m)

Battery

1

Battery Terminal Nuts

M10 x 1.5
Torque Specification
6 ft-lbs (8 N·m)

Ignition Coil

1

Ignition Coil Bracket Bolts

M8 x 1.25
Torque Specification
11 ft-lbs (15 N·m)
Important Notes
Estimated value based on general industry guidelines.

Fuel Pump

1

Fuel Pump Electrical Connector Bolts

M6 x 1.0
Torque Specification
6 ft-lbs (8 N·m)
Important Notes
Estimated value based on general industry guidelines.

Emissions Sensors

Torque specifications for Emissions_sensors

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure bolts are tightened in a crisscross pattern to evenly distribute the load.

Egr Valve

1

EGR Valve Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Do not over-torque as it may damage the valve housing.

Catalytic Converter

1

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.
2

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure a leak-free connection by inspecting after tightening.

Oxygen Sensor

1

Oxygen Sensor Mounting Nut

M18 x 1.5
Torque Specification
30 ft-lbs (40 N·m)
Important Notes
Estimated value based on similar sensor mounting nuts.

Dpf

1

DPF Mounting Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Tighten bolts in a crisscross pattern for even distribution.

Nox Sensor

1

NOx Sensor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the sensor is properly aligned before tightening.

Exhaust

Torque specifications for Exhaust

Exhaust Manifold Headers

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure bolts are torqued in a criss-cross pattern starting from the center outward.
2

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure bolts are torqued in a criss-cross pattern starting from the center outward.

Exhaust Pipe

1

Exhaust Pipe to Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the exhaust pipe is properly aligned before torquing.
2

Catalytic Converter to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the catalytic converter is properly aligned before torquing.
3

Muffler to Exhaust Pipe Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the muffler is properly aligned before torquing.
4

Exhaust Flange Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the flanges are properly aligned before torquing.

Exhaust Support

1

Exhaust Hanger Bolts

M6 x 1.0
Torque Specification
15 ft-lbs (20 N·m)
Important Notes
Ensure the hanger is properly aligned before torquing.
2

Exhaust Heat Shield Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Be cautious not to overtighten, as heat shields are typically made of thin metal.

Oxygen Sensor

1

Oxygen Sensor Bolts

M8 x 1.25
Torque Specification
25 ft-lbs (34 N·m)
Important Notes
Ensure the oxygen sensor is properly seated before torquing.

Fuel

Torque specifications for Fuel

Fuel Rail

1

Fuel Rail Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensures proper fuel delivery and prevents leaks.
2

Fuel Injector Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensures a tight seal and prevents fuel leaks.

Fuel Pump

1

Fuel Pump Mounting Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures the pump is securely mounted and prevents vibrations.
2

Fuel Tank Strap Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Ensures the fuel tank is securely mounted and prevents movement.

Fuel Delivery

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensures a leak-free seal and maintains fuel filtration.
2

Fuel Filler Neck Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensures a tight seal and prevents fuel vapor leaks.
3

Fuel Line Flare Nut Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar fuel line fittings. Ensures a leak-free seal.

Fuel Sensors

1

Fuel Pressure Sensor Bolt

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Estimated value based on similar sensor mounting bolts. Ensures a secure seal.

High Pressure Fuel Pump

1

High-Pressure Fuel Pump Bolts

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on similar fuel pump mounting bolts. Ensures secure mounting.

Hvac

Torque specifications for Hvac

Blower Motor

1

Blower Motor Mounting Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the motor is aligned properly before tightening.

Heater Core

1

Heater Core Cover Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the gasket is properly seated before tightening.

Evaporator Housing

1

Evaporator Core Housing Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the housing is properly aligned before tightening.

Air Mix Flap Actuator

1

Air Mix Flap Actuator Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the actuator is properly aligned with the flap mechanism.

Air Duct Clamp

1

Air Duct Clamp Bolts

M6 x 1.0
Torque Specification
7 ft-lbs (10 N·m)
Important Notes
Ensure the duct is properly seated before tightening.

Ac Compressor

1

A/C Compressor Mounting Bolts

M10 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Follow the specified torque sequence to ensure even tightening.

Ac Line Fittings

1

A/C Line Fittings

M8 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Ensure the fittings are properly aligned before tightening.

Suspension

Torque specifications for Suspension

Strut Shock Absorber System

1

Upper Strut Mounting Nuts

M10 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the nuts are tightened evenly to avoid misalignment of the strut assembly.
2

Lower Strut Mounting Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure proper alignment of the strut with the steering knuckle before tightening.
3

Rear Shock Absorber Mounting Bolts

M10 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the shock absorber is properly seated in its mounts before tightening.

Control Arm System

1

Control Arm Bolts

M12 x 1.5
Torque Specification
81 ft-lbs (110 N·m)
Important Notes
Ensure the control arm is properly aligned with the chassis and wheel hub before tightening.
2

Ball Joint Nut

M12 x 1.25
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Ensure the ball joint is properly seated in the steering knuckle before tightening.

Steering Components

1

Tie Rod End Nut

M10 x 1.25
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Ensure the tie rod end is properly seated in the steering knuckle before tightening.

Sway Bar System

1

Sway Bar Bracket Bolts

M8 x 1.25
Torque Specification
22 ft-lbs (30 N·m)
Important Notes
Ensure the sway bar is properly aligned in its brackets before tightening.
2

Sway Bar Link Nut

M8 x 1.25
Torque Specification
35 ft-lbs (47 N·m)
Important Notes
Ensure the sway bar link is properly seated before tightening.

Tg 81 Transmission

Torque specifications for Tg 81 Transmission

Transmission Mounting

1

Transmission Mounting Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)

Transmission Oil Pan

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Specification
80 in-lbs (9 N·m)
Important Notes
Note: The torque value is in inch-pounds, not foot-pounds.

Transmission Fluid System

1

Transmission Drain and Fill Plugs

M12 x 1.5
Torque Specification
22 ft-lbs (30 N·m)
2

Transmission Fluid Drain/Fill Plug

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)

Transmission Bellhousing

1

Transmission Bellhousing Bolts

M16 x 1.5
Torque Specification
44 ft-lbs (60 N·m)
Important Notes
Estimated value based on industry standards.

Transmission Crossmember

1

Transmission Crossmember Bolts

M18 x 1.5
Torque Specification
59 ft-lbs (80 N·m)
Important Notes
Estimated value based on industry standards.

Torque Converter

1

Torque Converter Bolts

M14 x 1.5
Torque Specification
37 ft-lbs (50 N·m)
Important Notes
Estimated value based on industry standards.

Transmission Cooler Lines

1

Transmission Cooler Line Fittings

M10 x 1.25
Torque Specification
18 ft-lbs (25 N·m)
Important Notes
Estimated value based on industry standards.

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 recommended torque specifications for the wheel lug nuts on a 2016-Present Volvo s90?

120 Nm (89 ft-lbs) using a calibrated torque wrench

Q2

What special tools or equipment are required to properly tighten critical bolts on the s90?

An accurate torque wrench with a range suitable for the specific bolt being tightened

Q3

What IS the proper order to tighten the cylinder head bolts on my 2021 Volvo s90?

Refer to the Volvo Technical Standards document for the specific tightening sequence and torque values

Q4

How do I ensure the accuracy of my torque wrench readings?

Torque wrenches should be regularly calibrated according to the manufacturer's recommendations

Q5

What are the risks of overtightening or undertightening bolts during s90 maintenance?

Overtightening can cause thread damage or bolt failure, while undertightening can lead to loose connections and potential safety hazards

Q6

Where can I find additional torque specifications for my s90?

Refer to the Volvo Service and Maintenance Manual for comprehensive torque specifications for all critical components

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 (10-100 Nm)

Essential for tightening fasteners to precise torque specifications, preventing damage and ensuring proper assembly. This range IS suitable for many applications on the s90.

  • Digital display for accurate readings
  • Audible alarm when target torque IS reached
  • Multiple units (Nm, ft-lb, in-lb)
  • Reversible ratcheting mechanism
Learn more
Service Procedures

Engine Cylinder Head Bolt Torquing Procedure

Technical procedure for tightening cylinder head bolts to specified torque values on the s90 engine.

  • Remove the cylinder head cover.
  • Clean the cylinder head and block mating surfaces.
  • Apply a thin layer of engine oil to the bolt threads.
  • Install the cylinder head bolts and tighten them to 25 Nm (18.4 lb-ft) in three stages.
  • Reinstall the cylinder head cover.
  • Torque the cylinder head cover bolts to 10 Nm (7.4 lb-ft).
View full procedure

Front Suspension Control Arm Bolt Torquing Procedure

Technical procedure for tightening control arm bolts to specified torque values on the s90 front suspension.

  • Raise the vehicle and support it on jack stands.
  • Remove the wheel.
  • Locate the control arm bolts.
  • Clean the bolt threads and apply a thin layer of anti-seize.
  • Tighten the control arm bolts to 150 Nm (110 lb-ft).
  • Reinstall the wheel and torque the lug nuts to 140 Nm (103 lb-ft).
View full procedure
Technical Service Bulletins

Technical Service Bulletin: Engine Oil Leak from Cylinder Head

2019-04-01

This bulletin addresses an oil leak from the cylinder head on certain 2016-2018 s90 models. The bulletin provides revised torque specifications for the cylinder head bolts to correct the issue.

2016-2018 s90

Resolution: Replace the cylinder head bolts and torque them to the revised specifications: 30 Nm (22.1 lb-ft) in three stages.

Technical Service Bulletin: Front Suspension Noise

2017-06-15

This bulletin addresses a noise from the front suspension on certain 2016-2017 s90 models. The bulletin provides revised torque specifications for the control arm bolts to correct the issue.

2016-2017 s90

Resolution: Tighten the control arm bolts to the revised specifications: 175 Nm (129 lb-ft).

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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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  • Always follow the manufacturer's recommended procedures and safety precautions.
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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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