Acura ZDX 2010-2013 Fuel System Bolt Torque Specifications & Line Fittings
Acura ZDX 2010-2013

Acura ZDX 2010-2013 Fuel System Bolt Torque Specifications

Detailed torque specifications for fuel system bolts on the 2010-2013 Acura ZDX, including fuel pump, fuel rail, and fuel line connections. This page provides essential information for safe and correct installation and repair.

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

Fuel System Fuel Rail

Torque specifications for fuel rail components and attachments.

1

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
Ensure proper fuel rail alignment before tightening. Use a criss-cross pattern for even torque.
2

Fuel Line Fitting at Fuel Rail

M12 x 1.5 (estimated)
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Confirm specific fitting type and torque with service manual. Over tightening can damage the fuel line or fitting. Use a back-up wrench to prevent twisting the line.

Fuel System Fuel Injectors

Torque specifications for fuel injector components and attachments.

1

Fuel Injector Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Use a small, calibrated torque wrench. Over-tightening can damage the injector body.
2

Fuel Injector Rail Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure injector rail is seated evenly. Over-tightening can damage the injector rail.

Fuel System Fuel Pump

Torque specifications for the fuel pump assembly and related components.

1

Fuel Pump Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure the fuel pump gasket is correctly seated. Over-tightening can damage the pump housing or fuel tank.
2

Fuel Line Fitting at Fuel Pump

M12 x 1.5 (estimated)
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Confirm specific fitting type and torque with service manual. Over tightening can damage the fuel line or fitting. Use a back-up wrench to prevent twisting the line.

Fuel System Fuel Tank

Torque specifications for the fuel tank and related attachments.

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Value
20 ft-lbs (27 N·m)
Important Notes
Ensure tank straps are correctly positioned. Over-tightening can damage the tank or mounting points.
2

Fuel Level Sending Unit Bolts/Ring

M5 x 0.8 (estimated) / Ring
Torque Value
5 ft-lbs (7 N·m)
Important Notes
Estimated value. If a retaining ring is used, tighten until secure. Over tightening can damage the sending unit or tank seal.

Fuel System Fuel Filter

Torque specifications for the fuel filter and related attachments.

1

Fuel Filter Bolt/Nut

M8 x 1.25
Torque Value
22 ft-lbs (30 N·m)
Important Notes
Ensure the fuel filter is properly aligned and seated. Over-tightening can damage the filter or mounting bracket.
2

Fuel Line Fitting at Fuel Filter

M12 x 1.5 (estimated)
Torque Value
12 ft-lbs (16 N·m)
Important Notes
Estimated value. Confirm specific fitting type and torque with service manual. Over tightening can damage the fuel line or fitting. Use a back-up wrench to prevent twisting the line.

Fuel System Fuel Filler Neck

Torque specifications for the fuel filler neck and attachments.

1

Fuel Filler Neck Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure proper alignment of the filler neck to the body or fuel tank. Over-tightening can damage the mounting flanges.

Fuel System Fuel Pressure Regulator

Torque specifications for the fuel pressure regulator.

1

Fuel Pressure Regulator Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure the regulator is seated properly. Over-tightening can damage the regulator or mounting surface.

Fuel System Fuel Vapor Canister

Torque specifications for the fuel vapor canister.

1

Fuel Vapor Canister Mounting Bolts

M6 x 1.0
Torque Value
8.7 ft-lbs (11.8 N·m)
Important Notes
Ensure the canister is mounted securely but avoid crushing the mounting hardware. Over-tightening can damage the canister or mounting bracket.

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 is using the correct torque specification for fuel bolts important?

Using the correct torque specification is crucial to prevent fuel leaks and potential fires. Under-tightening can lead to leaks due to insufficient sealing pressure, while over-tightening can damage threads, crush gaskets, or distort fuel components, also resulting in leaks. Precise torque ensures a secure and leak-proof fuel system.

Q2

What happens if I over-torque a fuel bolt?

Over-torquing a fuel bolt can cause significant damage. It can strip the threads in the fuel component, making it difficult or impossible to tighten correctly again. It can also crush gaskets or seals, leading to leaks. Furthermore, over-tightening can stress the bolt itself, causing it to weaken and potentially fail, which could result in fuel spillage or component damage during driving. A common scenario is cracking the fuel pump housing when over tightening the fuel line fittings.

Q3

What if I don't have a torque wrench?

While a torque wrench is highly recommended for precise torque application, especially in fuel systems, if one is not available, it's best to err on the side of under-tightening and monitor for leaks. Using a 'feel' approach, while not ideal, should be done with caution and gentle tightening. The bolt should be snug, but not forcefully wrenched. It is best to borrow or purchase a torque wrench as soon as possible. A simple 'hand tight' approach can result in a leak that could result in an engine fire.

Q4

Do I need to replace fuel bolt gaskets or seals when reassembling the fuel system?

Yes, it is highly recommended to replace fuel bolt gaskets and seals every time they are disassembled. These gaskets are designed to compress and seal during assembly, and once used, they may not provide the same level of sealing effectiveness upon reinstallation. Reusing old gaskets can lead to leaks, especially in high-pressure areas like the fuel rail or fuel pump fittings. Always use new, correct gaskets rated for fuel compatibility.

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 calibrated torque wrench is essential for applying the correct torque to fuel system fasteners.

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

Socket Set (Metric)

A set of metric sockets is required to fit the various bolt head sizes used in the fuel system.

  • Variety of sizes
  • Durable construction
Learn more

Extension Bars

Extension bars can help reach bolts in recessed or difficult-to-access locations within the fuel system.

  • Extends reach of sockets
  • Various lengths available
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

This procedure outlines how to properly tighten the fuel rail mounting bolts to the manufacturer-specified torque.

  • Locate the fuel rail mounting bolts.
  • Using the appropriate socket from the socket set, attach it to the torque wrench with any needed extension.
  • Set the torque wrench to 16 Nm (12 ft-lbs).
  • Tighten each bolt in a criss-cross pattern to the specified torque.
  • Verify all bolts are at the correct torque setting.
View full procedure

Fuel Injector Retaining Bolt Torque Procedure

This procedure outlines how to properly tighten the fuel injector retaining bolts to the manufacturer-specified torque.

  • Locate the fuel injector retaining bolts.
  • Using the appropriate socket, attach it to the torque wrench with any needed extension.
  • Set the torque wrench to 12 Nm (9 ft-lbs).
  • Tighten each bolt to the specified torque.
  • Verify all bolts are at the correct torque setting.
View full procedure

Fuel Line Fitting Torque Procedure

This procedure outlines how to properly tighten the fuel line fittings to the manufacturer-specified torque. Note: two common torque values are given. Always refer to the specific fitting torque specification.

  • Locate the fuel line fittings.
  • Using the appropriate wrench, attach it to the torque wrench.
  • Set the torque wrench to either 17 Nm (12.5 ft-lbs) for 14mm fittings, or 25 Nm (18 ft-lbs) for 17mm fittings. Refer to specific component documentation.
  • Tighten each fitting to the specified torque.
  • Verify all fittings are at the correct torque setting.
View full procedure
Technical Service Bulletins

Fuel Leak at Fuel Rail Connection

2011-05-15

Reports have indicated potential fuel leaks at the fuel rail connections due to under-torqued or overtightened bolts. Improper sealing of fittings may also lead to leaks. Ensure proper torque is applied during fuel system maintenance.

2010-2013 Acura ZDX

Resolution: Verify all fuel rail bolts are torqued to 16 Nm (12 ft-lbs). If a leak is present, inspect fuel line fittings. Confirm fuel line fitting connections at 17 Nm (12.5 ft-lbs) for 14mm fittings or 25 Nm (18 ft-lbs) for 17mm fittings.

Injector Retaining Bolt Loosening

2012-09-20

Some fuel injector retaining bolts may loosen over time. Check tightness and retorque to prevent vacuum leaks. Verify torque is correct and apply a small amount of non-permanent threadlocker.

2010-2013 Acura ZDX

Resolution: Verify the fuel injector retaining bolts are torqued to 12 Nm (9 ft-lbs). Apply a small amount of non-permanent threadlocker to the bolt threads before tightening.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

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