Acura RL 2005-2012 3.5L Engine Bolt Torque Specifications & Fastener Values
Acura RL 2005-2012

Acura RL 2005-2012 3.5L Engine Bolt Torque Specifications

Comprehensive guide to torque specifications for various bolts on the 3.5L V6 engine found in the 2005-2012 Acura RL. Includes cylinder head, main bearing, connecting rod, and other critical component bolt torques.

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

3.5l-engine Cylinder Head

Torque specifications for the cylinder head and related components.

1

Cylinder Head Bolts

M11 x 1.5
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Final torque value; multi-step tightening and sequence required. Refer to service manual for full procedure and sequence details.
2

Valve Cover Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even clamping.
3

Rocker Arms/Shafts Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten evenly to prevent binding.
4

Camshaft Sensor Bolt(s)

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Estimated value.
5

Variable Timing Solenoid/Actuator Bolts

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Ensure solenoid/actuator is properly seated before tightening. Estimated value.
6

Exhaust Manifold/Headers to Cylinder Head Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten in a sequence starting from the center and moving outwards to ensure even clamping pressure.

3.5l-engine Block

Torque specifications for engine block components.

1

Main Bearing Bolts

M10 x 1.5
Torque Value
56 ft-lbs (76 N·m)
Important Notes
Multi-step tightening and sequence required; refer to service manual for full procedure.
2

Oil Pan Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even sealing.
3

Timing Belt/Chain Tensioner Bolt

M10 x 1.25
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure correct tensioner position before tightening.
4

Crankshaft Sensor Bolt(s)

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Estimated value.
5

Knock Sensor Bolt(s)

M8 x 1.25
Torque Value
15 ft-lbs (20 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Estimated value.
6

Oil Filter Housing Bolt

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper housing alignment before tightening.
7

Oil Drain Plug Bolt

M14 x 1.5
Torque Value
29 ft-lbs (39 N·m)
Important Notes
Use a new crush washer/seal for each installation. Ensure bolt is properly aligned.
8

Water Pump Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten in a criss-cross pattern to ensure even clamping.
9

Engine Mount Bolts

M12 x 1.75
Torque Value
47 ft-lbs (64 N·m)
Important Notes
Tighten all engine mount bolts.

3.5l-engine Rotating Assembly

Torque specifications for the crankshaft and connecting rod components.

1

Connecting Rod Nuts

M9 x 1.25
Torque Value
24 ft-lbs (33 N·m)
Important Notes
Often includes an additional angle-tightening step; refer to the service manual. Proper torque is critical for correct bearing crush.
2

Flywheel Bolts

M10 x 1.25
Torque Value
94 ft-lbs (128 N·m)
Important Notes
Apply a light coat of thread locker. Tighten in a star pattern.
3

Crankshaft Pulley/Harmonic Balancer Bolt

M14 x 1.5
Torque Value
181 ft-lbs (245 N·m)
Important Notes
High torque is required. Ensure proper alignment and support before tightening.

3.5l-engine Intake System

Torque specifications for the intake manifold and related components.

1

Intake Manifold Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten in a criss-cross pattern to prevent vacuum leaks.
2

Throttle Body Bolts

M6 x 1.0
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten evenly to prevent vacuum leaks.
3

EGR Valve Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten evenly to prevent exhaust leaks.
4

Fuel Rail Bolts

M6 x 1.0
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Tighten evenly to prevent fuel leaks.
5

Fuel Injector Bolts

M6 x 1.0
Torque Value
13 ft-lbs (18 N·m)
Important Notes
Tighten evenly to prevent fuel leaks.

3.5l-engine Exhaust System

Torque specifications for exhaust manifold and related components.

1

Exhaust Manifold/Headers Bolts

M8 x 1.25
Torque Value
23 ft-lbs (31 N·m)
Important Notes
Tighten evenly to prevent exhaust leaks. Note this is for bolts mounting the exhaust pipe to the manifold.

3.5l-engine Cooling System

Torque specifications for the water pump, thermostat housing and related components.

1

Water Pump Pulley Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to ensure proper pulley alignment.
2

Thermostat Housing Bolts

M6 x 1.0
Torque Value
7 ft-lbs (10 N·m)
Important Notes
Tighten evenly to prevent coolant leaks.
3

Coolant Temperature Sensor Bolt(s)/Nut(s)

M6 x 1.0
Torque Value
14 ft-lbs (19 N·m)
Important Notes
Ensure sensor is properly seated before tightening. Estimated value.

3.5l-engine Accessory Drive

Torque specifications for the accessory drive system, including the drive belt tensioner and idler pulley.

1

Serpentine/Accessory Drive Belt Tensioner Bolt

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure proper tensioner alignment before tightening.
2

Drive Belt Idler Pulley Bolt

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure proper idler pulley alignment before tightening.
3

Power Steering Pump Mounting Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure proper pump alignment before tightening.
4

Alternator Mounting Bolts

M10 x 1.5
Torque Value
33 ft-lbs (45 N·m)
Important Notes
Ensure proper alternator alignment before tightening.
5

A/C Compressor Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (25 N·m)
Important Notes
Ensure proper compressor alignment before tightening.

3.5l-engine Ignition System

Torque specifications for the ignition coil mounting bolts.

1

Ignition Coil Bolt

M6 x 1.0
Torque Value
9 ft-lbs (12 N·m)
Important Notes
Tighten evenly to ensure good coil contact.

3.5l-engine Camshaft System

Torque specifications for camshaft components.

1

Camshaft Sprocket Bolt

M10 x 1.25
Torque Value
50 ft-lbs (68 N·m)
Important Notes
Ensure correct camshaft sprocket alignment before tightening. Correct torque is crucial for proper valve timing

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

Why are torque specifications important when working on my 3.5L Acura RL engine?

Torque specifications are crucial to ensure proper clamping force between bolted components. Under-tightening can lead to leaks, vibration, and component failure, while over-tightening can damage threads, deform parts, and even cause bolts to break. Using the correct torque ensures a secure and reliable assembly, maintaining the integrity of your 3.5L engine.

Q2

What type of torque wrench should I use for these torque specifications?

A click-type torque wrench is highly recommended for most applications on the 3.5L engine. These wrenches provide an audible and tactile click when the set torque is reached, reducing the risk of over-tightening. For very low torque specifications (under 10 ft-lbs), a beam-type or dial-type torque wrench may provide more accuracy. Always ensure your torque wrench is calibrated regularly to maintain accuracy.

Q3

Do I need to replace bolts when working on my Acura RL's 3.5L engine?

Generally, many bolts can be reused if they are in good condition, but certain bolts, especially those that undergo significant stress or clamping force (like cylinder head bolts or connecting rod bolts), are designed to stretch and should always be replaced. Consult the Acura repair manual for specific recommendations. Always inspect bolts for signs of damage, stretching, or corrosion before re-using. Replacing suspect bolts is cheap insurance against future problems.

Q4

What does 'Torque-to-Yield' mean, and are there any TTY bolts on the 3.5L engine?

'Torque-to-Yield' (TTY) bolts are designed to stretch beyond their elastic limit when tightened, providing consistent clamping force. These bolts are single-use and MUST be replaced each time they are removed. The 3.5L engine has some TTY bolts, including cylinder head bolts. Refer to the specific torque procedure for each bolt and use new TTY bolts when instructed.

Q5

How do I apply thread lubricant when required and what should I use?

When the torque specifications specify using a lubricant, apply a thin, even coating of the specified lubricant to the bolt threads (and under the head, if indicated) before installation. If not specified in the repair manual, use a light engine oil. This lubrication reduces friction and allows the bolt to be torqued accurately. Avoid excessive lubricant as this can result in over-torquing. Do not use threadlocker on bolts where it is not explicitly specified

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 (1/2 inch drive)

A calibrated torque wrench capable of measuring torque in a range applicable to engine fasteners.

  • Accurate torque application
  • Click-type mechanism for precise measurement
Learn more

Torque Wrench (3/8 inch drive)

A smaller torque wrench for lower torque applications.

  • Accurate torque application
  • Click-type mechanism for precise measurement
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various engine fasteners.

  • Wide range of socket sizes
  • Durable construction
Learn more

Socket Extensions

Extensions for sockets to reach recessed bolts.

  • Various lengths for accessibility
  • Sturdy build quality
Learn more

Universal Joint

A universal joint to allow socket access to bolts at an angle.

  • Flexibility for awkward angles
  • Durable construction
Learn more

Threadlocker (Medium Strength)

Threadlocker compound to prevent loosening of bolts due to vibration.

  • Prevents bolt back out
  • Medium hold strength
Learn more
Service Procedures

Cylinder Head Bolt Torque Procedure (3.5L J35A8 Engine)

Detailed steps for correctly torquing the cylinder head bolts on the 3.5L V6 engine.

  • Clean the cylinder head and block mating surfaces.
  • Install new head gasket.
  • Install cylinder head and new bolts, hand tighten.
  • Torque all bolts in proper sequence to 29 lb-ft (40 N-m) using the proper torque pattern.
  • Torque all bolts an additional 90 degrees using the proper torque pattern.
  • Torque all bolts an additional 90 degrees using the proper torque pattern.
  • Verify all torque values are correct.
View full procedure

Intake Manifold Bolt Torque Procedure (3.5L J35A8 Engine)

Steps for proper intake manifold bolt torque to the cylinder heads.

  • Clean intake manifold and cylinder head mating surfaces
  • Install intake manifold gasket
  • Install intake manifold, hand tighten bolts.
  • Torque bolts to 16 lb-ft (22 N-m) using the proper torque pattern.
  • Verify torque values are correct.
View full procedure

Exhaust Manifold Bolt Torque Procedure (3.5L J35A8 Engine)

Steps for proper exhaust manifold bolt torque to the cylinder heads.

  • Clean exhaust manifold and cylinder head mating surfaces
  • Install exhaust manifold gasket.
  • Install exhaust manifold, hand tighten bolts.
  • Torque bolts to 23 lb-ft (31 N-m) using the proper torque pattern.
  • Verify torque values are correct.
View full procedure

Oil Pan Bolt Torque Procedure (3.5L J35A8 Engine)

Steps for proper oil pan bolt torque to the engine block.

  • Clean oil pan and engine block mating surfaces.
  • Install oil pan gasket or sealant.
  • Install oil pan, hand tighten bolts.
  • Torque bolts to 12 lb-ft (16 N-m) using the proper torque pattern.
  • Verify torque values are correct.
View full procedure
Technical Service Bulletins

Engine Oil Leak from Oil Pan

2007-05-10

Some 2005-2007 Acura RL models may experience oil leaks from the oil pan due to improper sealant application or bolt torque.

2005-2007

Resolution: Inspect the oil pan for leaks. Clean mating surfaces, apply new sealant, and torque bolts to the specified 12 lb-ft (16 N-m) using the proper torque pattern.

Cylinder Head Bolt Stretching

2010-02-22

Some 2008-2010 Acura RL models may experience cylinder head bolt stretching due to overheating or over-torquing of the bolts.

2008-2010

Resolution: If cylinder head bolts show signs of stretching replace with new cylinder head bolts and torque to specifications. Refer to the cylinder head bolt torque procedure.

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 Acura Specs. All rights reserved.

Privacy Policy Terms of Service