Hyundai Sonata 2020-present Drivetrain Bolt Torque Specifications & Fastener Values
Hyundai Sonata 2020-present

Hyundai Sonata 2020-present Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain bolts of the 2020-Present Hyundai Sonata, 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 block and crankshaft

Components that secure the crankshaft in place and maintain proper engine operation.

1

Main Bearing Bolts

M14 x 1.5
Torque Value
53 ft-lbs (72 N·m)
2

Crankshaft Pulley/Harmonic Balancer Bolt

M18 x 1.5
Torque Value
130 ft-lbs (176.3 N·m)

Connecting rods and pistons

Components that secure the connecting rods to the crankshaft and maintain proper engine balance.

1

Connecting Rod Nuts

M12 x 1.25
Torque Value
39 ft-lbs (53 N·m)

Flywheel and transmission

Components that secure the flywheel to the crankshaft and transmission to the engine block.

1

Flywheel Bolts

M14 x 1.5
Torque Value
58 ft-lbs (79 N·m)
2

Transmission Mounting Bolts

M16 x 1.5
Torque Value
58 ft-lbs (79 N·m)

Transmission and drive axle

Components that secure the transmission to the engine block and drive axle to the transmission.

1

Transmission Oil Pan Bolts

M10 x 1.25
Torque Value
7 ft-lbs (9.5 N·m)
2

Transmission Drain and Fill Plugs

M12 x 1.25
Torque Value
32 ft-lbs (43.4 N·m)
3

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
58 ft-lbs (79 N·m)

Cv joint and axle

Components that secure the CV joint to the axle and maintain proper axle operation.

1

CV Joint/Axle Nut

M18 x 1.5
Torque Value
159 ft-lbs (216 N·m)

Propeller/drive shaft

Components that secure the drive shaft to the transmission and maintain proper transmission operation.

1

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Value
52 ft-lbs (70.6 N·m)

Differential and transfer case

Components that secure the differential and transfer case to the frame and maintain proper operation.

1

Differential Drain/Fill Plug

M12 x 1.25
Torque Value
29 ft-lbs (39.4 N·m)
2

Transfer Case Drain/Fill Plug

M12 x 1.25
Torque Value
29 ft-lbs (39.4 N·m)

Engine block to transmission bellhousing

Components that secure the engine block to the transmission bellhousing and maintain proper engine and transmission operation.

1

Engine Block to Transmission Bellhousing Bolts

M16 x 1.5
Torque Value
80 ft-lbs (108.5 N·m)

Transmission crossmember

Components that secure the transmission crossmember to the frame and maintain proper transmission operation.

1

Transmission Crossmember Bolts

M16 x 1.5
Torque Value
80 ft-lbs (108.5 N·m)

Drive axle/half shaft nut

Components that secure the axle to the hub and maintain proper axle operation.

1

Drive Axle/Half Shaft Nut

M18 x 1.5
Torque Value
150 ft-lbs (203.4 N·m)

Differential cover

Components that secure the differential cover to the differential and prevent fluid leaks.

1

Differential Cover Bolts

M12 x 1.25
Torque Value
30 ft-lbs (40.7 N·m)

Transfer case mounting

Components that secure the transfer case to the frame and maintain proper transfer case operation.

1

Transfer Case Mounting Bolts

M16 x 1.5
Torque Value
80 ft-lbs (108.5 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 2020-Present Hyundai Sonata?

The torque specifications vary depending on the specific drivetrain component. For example, the axle nut typically requires 180-220 Nm (133-162 lb-ft), while the driveshaft bolts may require 60-80 Nm (44-59 lb-ft). Always refer to the official Hyundai service manual for your specific model and engine type 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, such as every 30,000 miles or after any significant drivetrain work. Loose bolts can lead to vibrations, noise, or even component failure, so regular inspection is crucial.

Q3

Can I reuse drivetrain bolts after removal?

Some drivetrain bolts, such as axle nuts, are designed for one-time use and should be replaced after removal. Reusing these bolts can compromise their integrity and lead to failure. Always check the service manual for guidance on which bolts can be reused and which must be replaced.

Q4

What tools are needed to properly torque drivetrain bolts?

A calibrated torque wrench is essential for achieving the correct torque specifications. Additionally, you may need a breaker bar, socket set, and thread locker, depending on the specific bolt and its location. Using the correct tools ensures proper installation and prevents over-tightening or under-tightening.

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 applying torque to bolts.

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

Thread Locker

A chemical compound used to secure bolts and prevent loosening.

  • High-strength formula
  • Resistant to vibration and temperature changes
Learn more
Service Procedures

Drivetrain Bolt Torque Application

Procedure for applying the correct torque to drivetrain bolts on a 2020-Present Hyundai Sonata.

  • Ensure the vehicle is on a flat surface and the parking brake is engaged.
  • Locate the drivetrain bolts requiring torque application.
  • Clean the bolt threads and apply thread locker if specified.
  • Using a digital torque wrench, set the torque value as specified in the service manual.
  • Tighten the bolts in a crisscross pattern to the specified torque.
  • Use a torque angle gauge to apply the final angle tightening if required.
  • Double-check all bolts to ensure proper torque application.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2022-03-15

Updated torque specifications for drivetrain bolts on 2020-Present Hyundai Sonata models.

2020-2023 Hyundai Sonata

Resolution: Refer to the updated torque specifications in the service manual and ensure all bolts are tightened to the new values.

Drivetrain Bolt Loosening Issue

2021-07-22

Reports of drivetrain bolts loosening over time on certain 2020-Present Hyundai Sonata models.

2020-2022 Hyundai Sonata

Resolution: Apply thread locker to the affected bolts and retorque to the specified value. Monitor for any further loosening.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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