Buick Verano 2012-2017 Fuel System Bolt Torque Specifications & Line Fittings
Buick Verano 2012-2017

Buick Verano 2012-2017 Fuel System Bolt Torque Specifications

Detailed torque specifications for fuel system bolts on the 2012-2017 Buick Verano, including fuel line connections, fuel rail bolts, and fuel pump module fasteners.

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 Pump Module

This section details torque specifications for components related to the fuel pump module, located inside the fuel tank. Proper torque is crucial for preventing fuel leaks and ensuring the pump assembly remains properly seated.

1

Fuel Pump Module Retaining Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel pump module to the fuel tank. Proper torque is critical to prevent fuel leaks and ensure the pump assembly remains properly seated. Based on similar GM models and industry standards for fuel pump retaining bolts.

Fuel Tank

This section outlines torque specifications for the fuel tank and its mounting straps. Correct torque is vital for secure tank mounting and preventing damage.

1

Fuel Tank Strap Bolts

M10 x 1.5
Torque Value
30 ft-lbs (41 N·m)
Important Notes
Secures the fuel tank to the vehicle chassis. Under-torquing can lead to a shifting tank and potential damage. Over-torquing can distort or damage the straps. Based on similar GM models and industry standards for fuel tank straps.

Fuel Lines

This section contains torque specifications for fuel line connections, including quick-connects and various fittings. Proper tightening is crucial to prevent leaks.

1

Fuel Line Quick-Connect Retaining Clip Screws

M4 x 0.7
Torque Value
0.41 ft-lbs (0.55 N·m)
Important Notes
These small screws secure the quick-connect retaining clips. Over-torquing can damage the clips or quick connects, leading to fuel leaks. Estimated value based on industry standards for small plastic component mounting screws.
2

Fuel Line Fitting Connection

N/A
Torque Value
0 ft-lbs (0 N·m)
Important Notes
Follow the torque value provided with the specific fitting type, if any. Fuel line fittings have varying specs depending on the material. It’s critical to follow the manufacturer’s recommendations for these connections to prevent leaks. Torque specifications will vary by fitting type, ensure to refer to manufacture data for your specific fuel line fitting.

Fuel Filter

This section includes torque specifications for the fuel filter and its mounting bracket. Ensuring these are properly secured prevents damage from vibration.

1

Fuel Filter Bracket Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
Secures the fuel filter to the vehicle body or chassis. Ensures the filter is held securely and prevents damage from vibration. Based on similar GM models and industry standards for fuel filter brackets.

Fuel Injectors And Rail

This section covers the torque specifications for fuel injector mounting and fuel rail installation. Proper torque ensures injector seals correctly and prevents fuel leaks.

1

Fuel Injector Retaining Bolts

M6 x 1.0
Torque Value
8 ft-lbs (11 N·m)
Important Notes
These bolts secure the fuel injector rail to the intake manifold. Proper torque is necessary for proper sealing of injectors and fuel rail. Based on similar GM models and industry standards for fuel rail mounting.
2

Fuel Rail Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
Fastens the fuel rail to the intake manifold. Ensures a secure mounting point for the fuel injectors. Over or under torquing can lead to leaks or injector damage. Based on similar GM models and industry standards for fuel rail mounting.

High Pressure Fuel Pump

This section details the torque specifications for the high-pressure fuel pump. Proper tightening is crucial for correct pump operation and to prevent leaks.

1

High-Pressure Fuel Pump Mounting Bolts

M8 x 1.25
Torque Value
18 ft-lbs (24 N·m)
Important Notes
These bolts hold the high-pressure fuel pump onto the engine block. This is a high-stress area, and proper torque is critical for proper pump operation and sealing. Based on similar GM models and industry standards for high-pressure fuel pump mounting.

Fuel Pressure Sensor

This section includes torque specifications for the fuel pressure sensor. Low torque values are necessary to prevent sensor damage and ensure a proper seal.

1

Fuel Pressure Sensor Mounting Screw

M5 x 0.8
Torque Value
6 ft-lbs (8 N·m)
Important Notes
The sensor threads into the fuel rail. This low torque is required to prevent damage to the delicate sensor and ensure it seals properly. Based on industry standard for fuel pressure sensor mounting.

Evap System

This section details torque specifications for components of the evaporative emissions (EVAP) system, including the canister and purge solenoid.

1

EVAP Canister Mounting Bolts

M6 x 1.0
Torque Value
10 ft-lbs (14 N·m)
Important Notes
These secure the Evaporative Emissions (EVAP) canister. This ensures it's properly mounted and does not vibrate loose. Based on similar GM models and industry standards for EVAP canister mounting.
2

EVAP Purge Solenoid Mounting Screws

M4 x 0.7
Torque Value
0.41 ft-lbs (0.55 N·m)
Important Notes
These secure the small purge solenoid. They don’t need high torque to maintain secure connection. Over-tightening can damage the solenoid. Estimated value based on industry standards for small plastic component mounting screws.
3

Fuel Tank Vent Line Connection

N/A
Torque Value
0 ft-lbs (0 N·m)
Important Notes
These plastic connections should not be over tightened, as over tightening may crack or damage the material. Follow manufacturer’s specifications when tightening. Based on industry standard for plastic vapor line connections.

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 happens if I overtighten fuel system bolts?

Overtightening fuel system bolts, particularly those on fuel lines, the fuel rail, or the fuel pump, can cause damage. This includes stripping threads, deforming sealing surfaces, and potentially causing leaks or component failure. Overtightening can also cause the bolt to stretch which means it may not properly hold in place after subsequent loosenings. It's critical to use a calibrated torque wrench and adhere to the specified torque values.

Q2

What happens if I undertighten fuel system bolts?

Undertightening fuel system bolts can lead to fuel leaks, which pose a serious fire hazard. Insufficient torque may prevent proper sealing, resulting in fuel weeping or spraying. This not only poses a safety risk but can also cause poor engine performance and loss of fuel pressure. It's as important to avoid under torquing bolts as it is to avoid over torquing.

Q3

Do fuel bolt torque specifications differ based on material?

Yes, torque specifications can differ based on bolt material (steel, aluminum) and whether the bolt is going into a metal or plastic component. Buick specifies torque values based on these factors, so always use the correct specifications for your exact application and consult a repair manual specific to your vehicle. Failing to do this can cause irreparable damage to your vehicle.

Q4

Should I use threadlocker on fuel system bolts?

Generally, threadlocker is not recommended for most fuel system bolts unless explicitly specified by Buick. The use of threadlocker can make bolts more difficult to remove and can alter the torque settings and can interfere with sealing. Using threadlocker on fuel line connections is dangerous and strongly discouraged.

Q5

Do I need to replace fuel system bolts after removing them?

While not always mandatory, it's highly recommended to replace fuel system bolts, particularly those sealing fuel lines or the fuel pump, every time they are removed. This is because bolts can stretch or deform during use, and old bolts may not provide the required clamping force or sealing in the same way as a new bolt. Using old bolts can lead to leaks and system failure.

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 (1/4" or 3/8" Drive)

A calibrated torque wrench is essential for tightening fuel system bolts to the correct specifications. Ensure it covers the required torque range.

  • Click-type or digital display
  • Accurate within +/- 3%
  • Proper drive size for sockets
Learn more

Socket Set (Metric)

A set of metric sockets to fit the various bolt heads found on the fuel system components. Often requires deep sockets.

  • Variety of sizes (8mm - 15mm commonly used)
  • 6-point design for secure grip
  • Durable chrome vanadium steel
Learn more

Extension Bars

Various length extension bars may be needed to reach recessed fuel system bolts, like those on the fuel rail or injectors.

  • 1/4" or 3/8" drive
  • Multiple lengths (3", 6", 10")
  • Swivel adapters for hard to reach areas
Learn more

Pick Set

Used for releasing wiring harness clips and potentially some fuel line connectors.

  • Assorted sizes and shapes
  • Durable construction
  • Ergonomic handles
Learn more
Service Procedures

Fuel Rail Bolt Torque Procedure

This procedure outlines the steps for correctly torquing the bolts securing the fuel rail to the intake manifold.

  • Locate the fuel rail mounting bolts.
  • Using the correct size socket, hand tighten each bolt evenly.
  • Set the torque wrench to the specification of 106 lb-in (12 Nm) +/-15 lb-in.
  • Tighten each bolt using the torque wrench in a crisscross pattern to ensure even pressure.
  • Verify the torque on all bolts again to ensure all fasteners are at the correct torque specification.
View full procedure

Fuel Injector Retaining Bolt Torque Procedure

Steps to correctly tighten bolts that secure the fuel injectors to the fuel rail.

  • Locate the injector retaining bolts or clips.
  • If applicable, make sure the seals are in good condition on the injector.
  • Hand-tighten the fuel injector retaining bolts evenly.
  • Using a torque wrench set to the specification of 89 lb-in (10 Nm) +/- 12 lb-in, tighten each bolt to the correct torque.
  • Double check the torque of each fastener to ensure they are all at the correct specification.
View full procedure

High-Pressure Fuel Pump Bolt Torque Procedure

Steps to properly torque the mounting bolts for the high-pressure fuel pump.

  • Locate all high-pressure fuel pump mounting bolts.
  • Hand-tighten all the high pressure pump mounting bolts evenly.
  • Using a torque wrench set to the specification of 18 lb-ft (24 Nm) +/-2 lb-ft, torque each bolt to the correct specification.
  • Verify that each fastener is at the correct torque specification.
View full procedure
Technical Service Bulletins

Fuel Rail Bolt Corrosion and Torque Specification Update

2016-04-15

This bulletin addresses instances of fuel rail bolt corrosion which can lead to incorrect torque values. Updates torque specifications for some models.

2012-2015 Buick Verano

Resolution: Replace affected bolts with corrosion-resistant alternatives and torque to the updated specification of 115 lb-in (13 Nm).

Fuel Injector Seal Leakage and Retaining Bolt Inspection

2014-08-22

This bulletin details a potential issue of fuel injector seal leakage due to improper installation or torque and inspect the retaining bolts.

2013-2014 Buick Verano

Resolution: Inspect fuel injector seals, replace if necessary, and ensure retaining bolts are torqued to 89 lb-in (10 Nm) using the proper procedure. Replace any deformed bolts and be sure to re-torque fasteners after warm up.

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 Buick Specs. All rights reserved.

Privacy Policy Terms of Service