Hyundai Sonata 2015-2019 Drivetrain Bolt Torque Specifications & Fastener Values
Hyundai Sonata 2015-2019

Hyundai Sonata 2015-2019 Drivetrain Bolt Torque Specifications

Detailed torque specifications for the drivetrain components of the 2015-2019 Hyundai Sonata, including engine, transmission, 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 and transmission mounting

Bolts that secure the engine and transmission to the vehicle frame or engine block.

1

Flywheel Bolts

M14 x 1.5
Torque Value
94 ft-lbs (127 N·m)
Important Notes
Proper torque ensures the flywheel is properly seated and aligned.
2

Transmission Mounting Bolts

M12 x 1.25
Torque Value
48 ft-lbs (65 N·m)
Important Notes
Proper torque ensures the transmission is properly aligned and supported.

Transmission and differential fluid system

Bolts that secure the transmission and differential fluid pans and plugs.

1

Transmission Oil Pan Bolts

M10 x 1.0
Torque Value
71 in-lbs (8 N·m)
Important Notes
Proper torque ensures the oil pan is properly sealed and secured.
2

Transmission Drain and Fill Plugs

M12 x 1.25
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the plugs are properly sealed and secured.
3

Differential Drain/Fill Plug

M12 x 1.25
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Proper torque ensures the plug is properly sealed and secured.

Drivetrain and axle components

Bolts that secure the drivetrain and axle components.

1

Drive Axle/Half Shaft Bolts

M14 x 1.5
Torque Value
58 ft-lbs (78 N·m)
Important Notes
Proper torque ensures the drive axle/half shaft is properly seated and aligned.
2

CV Joint/Axle Nut

M18 x 1.5
Torque Value
177 ft-lbs (240 N·m)
Important Notes
Proper torque ensures the CV joint is properly seated and aligned.
3

Propeller/Drive Shaft Bolts

M14 x 1.5
Torque Value
58 ft-lbs (78 N·m)
Important Notes
Proper torque ensures the propeller/drive shaft is properly seated and aligned.

Engine sensors and accessories

Bolts that secure the engine sensors and accessories.

1

Crankshaft Position Sensor Bolt

M8 x 1.0
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Proper torque ensures the sensor is properly seated and aligned.
2

Camshaft Position Sensor Bolt

M8 x 1.0
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Proper torque ensures the sensor is properly seated and aligned.
3

Transmission Cooler Line Fittings

M10 x 1.0
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Estimated value. Proper torque ensures the fittings are properly sealed and secured.

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 torque specification for the drivetrain bolts on a 2015-2019 Hyundai Sonata?

The torque specifications for drivetrain bolts vary depending on the specific component. For example, the axle nut typically requires 180-220 ft-lbs, while transmission mounting bolts may require 40-60 ft-lbs. Always refer to the official Hyundai service manual for your specific model and year for precise values.

Q2

Can I reuse drivetrain bolts after removal?

It is generally not recommended to reuse drivetrain bolts, especially critical ones like axle nuts or transmission bolts. These bolts are often designed to stretch during installation (torque-to-yield) and may lose their integrity after removal. Always replace them with new, manufacturer-approved bolts to ensure proper torque and safety.

Q3

What happens if I under-torque or over-torque drivetrain bolts?

Under-torquing can lead to loose bolts, causing vibrations, component misalignment, or even failure. Over-torquing can strip threads, damage components, or cause bolts to break. Both scenarios can compromise the drivetrain's performance and safety. Always use a calibrated torque wrench and follow the manufacturer's specifications.

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

Breaker Bar

A long-handled tool for loosening tight bolts before applying torque.

  • Durable construction
  • Compatible with standard sockets
Learn more
Service Procedures

Drivetrain Bolt Torque Application

Detailed steps for applying the correct torque to drivetrain bolts on a 2015-2019 Hyundai Sonata.

  • Ensure the vehicle is on a flat surface and the parking brake is engaged.
  • Locate the drivetrain bolts requiring torque application.
  • Use a breaker bar to loosen the bolts if necessary.
  • Set the digital torque wrench to the specified torque value for the drivetrain bolts.
  • Apply torque to each bolt in a crisscross pattern to ensure even distribution.
  • Use a torque angle gauge to verify the angle of rotation if required.
  • Double-check all bolts to ensure they are properly torqued.
View full procedure
Technical Service Bulletins

Drivetrain Bolt Torque Specification Update

2018-05-15

Updated torque specifications for drivetrain bolts on 2015-2019 Hyundai Sonata models.

2015-2019 Hyundai Sonata

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

Drivetrain Bolt Loosening Issue

2017-11-10

Reports of drivetrain bolts loosening over time on certain 2015-2019 Hyundai Sonata models.

2015-2019 Hyundai Sonata

Resolution: Inspect all drivetrain bolts and re-torque to the specified values. Apply thread locker if necessary.

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.

Facebook Contact
15+ Years
Experience
500+ Guides
Guides
50+ Makes
Vehicles
1000+ Solutions
Solutions

Diagnostic

Specialized in advanced diagnostic techniques using modern scan tools and oscilloscopes.

Repair

Expert in both traditional mechanical repairs and modern vehicle systems.

Additional Expertise

Documentation

Created over 500 detailed repair guides and technical documents.

Training

Conducted technical training sessions and contributed to repair databases.

Certifications & Research

Certifications

  • ASE Master Technician Certification
  • Advanced Diagnostic Specialist
  • Hybrid/Electric Vehicle Systems
  • Performance Tuning Expert

Research & Community

Actively researches emerging technologies and contributes to automotive forums.

Legal Disclaimer

Important information about using this content

Always refer to your vehicle's service manual and take appropriate safety precautions when performing any maintenance or repairs.

General Information
The information provided on this website is for general informational purposes only. While we strive to maintain accuracy in our content, all specifications, procedures, and technical information should be verified against your vehicle's official service manual or with the manufacturer directly.
Warranty & Liability

The content on this website is provided "as is" without any representations or warranties, express or implied. We make no representations or warranties regarding the accuracy, completeness, or availability of the information.

We shall not be liable for any direct, indirect, special, or consequential damages arising from the use of information on this website.

Technical Information
  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
  • Vehicle specifications and procedures may vary by model year, trim level, and region.
  • Always follow the manufacturer's recommended procedures and safety precautions.
  • Working on vehicles can be dangerous. Always take proper safety precautions and use appropriate safety equipment.
  • If you're unsure about any procedure, consult a qualified professional mechanic.
Intellectual Property
All content, including text, images, and specifications, is protected by copyright and other intellectual property laws. Any unauthorized use or reproduction is prohibited.

© 2025 Hyundai Specs. All rights reserved.

Privacy Policy Terms of Service