Hyundai XG350 2002-2005 Suspension Bolt Torque Specifications & Fastener Values
Hyundai XG350 2002-2005

Hyundai XG350 2002-2005 Suspension Bolt Torque Specifications

Detailed torque specifications for suspension bolts on the 2002-2005 Hyundai XG350, including front and rear suspension 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

Strut/shock absorber mounting

Secures the strut/shock absorber to the vehicle's frame, ensuring proper suspension function and stability.

1

Strut/Shock Absorber Mounting Bolts

M14 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 61-69 ft-lbs (82-94 nm)

Control arm mounting

Attaches the control arms to the vehicle's frame and suspension components, maintaining proper alignment and stability.

1

Control Arm Bolts

M16 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 58-72 ft-lbs (79-98 nm)

Ball joint and tie rod end

Secures the ball joint to the control arm and the tie rod end to the steering knuckle or control arm, enabling smooth suspension movement and preventing damage to surrounding components.

1

Ball Joint Nut

M18 x 1.5
Torque Value
65 ft-lbs (88 N·m)
Important Notes
Torque value range: 58-72 ft-lbs (79-98 nm)
2

Tie Rod End Nut

M12 x 1.25
Torque Value
36 ft-lbs (49 N·m)
Important Notes
Torque value range: 32-40 ft-lbs (43-54 nm)

Steering knuckle and upper/lower control arm bushing

Secures the steering knuckle to the control arm and the upper/lower control arm bushing to the control arm, affecting toe alignment and suspension stability.

1

Steering Knuckle Bolts

M18 x 1.5
Torque Value
75 ft-lbs (102 N·m)
Important Notes
Estimated torque value range: 70-80 ft-lbs (95-108 nm)
2

Upper Control Arm Bushing Bolts

M12 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value range: 30-40 ft-lbs (41-54 nm)
3

Lower Control Arm Bushing Bolts

M12 x 1.25
Torque Value
35 ft-lbs (47 N·m)
Important Notes
Estimated torque value range: 30-40 ft-lbs (41-54 nm)

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 suspension bolts on a 2002-2005 Hyundai XG350?

The torque specifications for the suspension bolts vary by component. For example, the front strut-to-knuckle bolts should be torqued to 65-80 ft-lbs, while the rear shock absorber lower mounting bolts require 40-55 ft-lbs. Always refer to the vehicle's service manual for precise values, as improper torque can lead to component failure.

Q2

How often should suspension bolts be checked for proper torque?

Suspension bolts should be checked during routine maintenance, such as tire rotations or alignment services, or after any suspension work. Additionally, inspect them if you notice unusual noises, vibrations, or handling issues. Over time, bolts can loosen due to vibrations and stress.

Q3

Can I reuse suspension bolts after removal?

It is generally recommended to replace suspension bolts after removal, especially if they are torque-to-yield (TTY) bolts. Reusing TTY bolts can compromise their integrity and lead to failure. Always consult the service manual to determine if a bolt is reusable or requires replacement.

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

A precision tool used to apply a specific torque to a fastener such as a bolt or nut.

  • Adjustable torque settings
  • Calibrated for accuracy
Learn more

Socket Set

A set of sockets in various sizes to fit suspension bolts and nuts.

  • Includes both metric and standard sizes
  • Durable construction
Learn more

Breaker Bar

A long-handled tool used to loosen tight bolts before applying torque.

  • High leverage for tough bolts
  • Durable steel construction
Learn more
Service Procedures

Front Suspension Bolt Torque Specifications

Procedure to apply correct torque to front suspension bolts on a 2002-2005 Hyundai XG350.

  • Lift the vehicle and secure it on jack stands.
  • Remove the front wheels to access suspension components.
  • Tighten the lower control arm bolts to 70-80 ft-lbs.
  • Tighten the strut-to-knuckle bolts to 50-60 ft-lbs.
  • Reinstall the wheels and lower the vehicle.
View full procedure

Rear Suspension Bolt Torque Specifications

Procedure to apply correct torque to rear suspension bolts on a 2002-2005 Hyundai XG350.

  • Lift the vehicle and secure it on jack stands.
  • Remove the rear wheels to access suspension components.
  • Tighten the rear trailing arm bolts to 60-70 ft-lbs.
  • Tighten the rear shock absorber bolts to 40-50 ft-lbs.
  • Reinstall the wheels and lower the vehicle.
View full procedure
Technical Service Bulletins

Suspension Bolt Torque Correction

2004-05-15

Bulletin addressing incorrect torque specifications for suspension bolts in certain 2002-2005 Hyundai XG350 models.

2002-2005 Hyundai XG350

Resolution: Refer to updated torque specifications in the service manual and ensure proper tightening procedures are followed.

Suspension Noise and Vibration

2003-08-20

Bulletin addressing suspension noise and vibration issues caused by improperly torqued bolts.

2002-2003 Hyundai XG350

Resolution: Inspect all suspension bolts for proper torque and retighten as necessary. Replace any damaged components.

About the Author

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Alan Montanye - Automotive Technical Specialist
ASE

Alan Montanye

Automotive Technical Specialist

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