Buick Regal 2011-2017 Electrical System Bolt Torque Specifications & Ground Points
Buick Regal 2011-2017

Buick Regal 2011-2017 Electrical System Bolt Torque Specifications

Detailed torque specifications for electrical system bolts on the 2011-2017 Buick Regal, including grounding points, fuse box mounts, and other relevant electrical connections.

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

Battery System

Torque specifications for components related to the vehicle's battery, starting, and charging systems.

1

Battery Terminal Bolts (Positive & Negative)

M6
Torque Value
10 in-lbs (13.5 N·m)
Important Notes
Ensures secure and low-resistance electrical connection to the battery terminals. Loose connections can cause starting issues, charging problems, and even overheating. Values estimated based on similar GM models.
2

Battery Hold-Down Bolts

M8
Torque Value
9 ft-lbs (12.2 N·m)
Important Notes
Secures the battery in its tray, preventing movement that could lead to terminal damage or shorts. Values estimated based on common M8 fasteners.
3

Starter Motor Mounting Bolts

M12 x 1.75
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These bolts attach the starter motor securely to the engine block or transmission housing. Proper torque ensures correct starter engagement and prevents damage due to vibration. Source: Similar Buick models from same era with 2.0L and 2.4L engines.
4

Alternator Mounting Bolts

M12 x 1.75
Torque Value
37 ft-lbs (50 N·m)
Important Notes
These bolts secure the alternator to its bracket on the engine. Proper torque is vital to prevent slippage or vibration which could damage the alternator and drive belt. Source: Similar Buick models from same era with 2.0L and 2.4L engines.

Grounding System

Specifications for grounding points and straps on the vehicle.

1

Ground Strap/Cable Bolts to Frame/Chassis

M8 x 1.25
Torque Value
16 ft-lbs (22 N·m)
Important Notes
These bolts create essential electrical connections to the vehicle's frame for grounding circuits. Loose connections can cause a wide range of electrical issues. Estimated based on common M8 fasteners.
2

Instrument Panel Ground Terminal Bolts

M6 x 1
Torque Value
7.4 ft-lbs (10 N·m)
Important Notes
Ensures a good ground connection for the instrument panel. Prevents erratic readings or electrical problems in the cluster. Estimated, from similar interior ground location in GM vehicles.

Control Modules

Torque values for securing the vehicle's control modules.

1

Engine Control Module (ECM) Mounting Bolts

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Secures the ECM to the body/mounting bracket; proper torque avoids damage to sensitive electronics and ensures good ground. Estimated from similar GM module mounting in same era, based on M6 screw size
2

Body Control Module (BCM) Mounting Bolts

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Secures the BCM to the body/mounting bracket, providing support and preventing vibration damage. Estimated from similar GM module mounting in same era, based on M6 screw size.

Lighting System

Torque values for mounting headlight and taillight assemblies.

1

Headlight Assembly Mounting Bolts

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Holds the headlight assembly in place and to the body panels. Proper torque prevents damage or misalignment. Estimated, based on standard automotive body panel mounting and M6 screw size
2

Tail Light Assembly Mounting Bolts

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Holds the tail light assembly in place and to the body panels. Proper torque prevents damage or misalignment. Estimated, based on standard automotive body panel mounting and M6 screw size

Power Distribution

Torque specifications for the vehicle's fuse box and power distribution center.

1

Fuse Box/Power Distribution Center Mounting Bolts

M8 x 1.25
Torque Value
9 ft-lbs (12.2 N·m)
Important Notes
Securely fastens the fuse box to prevent movement and wiring issues. Estimated from similar GM components, and based on M6/M8 bolt size.

Ignition System

Torque specifications for components related to the ignition system.

1

Ignition Coil Mounting Bolts

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Securely holds the ignition coils to the engine. Incorrect torque can affect the performance and cause vibrations or coil issues. Estimated from similar GM coil mounting applications, and based on M6 bolt size.

Sensor System

Torque values for mounting bolts on various sensors.

1

Speed Sensor Mounting Bolt (Wheel/Transmission)

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Secures the speed sensor to the wheel hub or transmission. Proper torque ensures correct readings and sensor function. Industry standard based on M6 fasteners for similar sensors.
2

Camshaft Position Sensor Mounting Bolt

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Secures the camshaft sensor to the engine block or cylinder head. Proper torque is crucial for correct sensor positioning and reading. Industry standard based on M6 fasteners for similar sensors.
3

Crankshaft Position Sensor Mounting Bolt

M6 x 1
Torque Value
7.4 in-lbs (10 N·m)
Important Notes
Secures the crankshaft sensor to the engine block. Proper torque is crucial for correct sensor positioning and reading. Industry standard based on M6 fasteners for similar sensors.

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 it important to use the correct torque specifications on electrical connections?

Using the correct torque is crucial for reliable electrical connections. Over-tightening can damage components, crush wires, or strip threads, leading to intermittent connections or shorts. Under-tightening can cause loose connections, leading to increased resistance, heat generation, and potential fires. Accurate torque ensures proper contact and prevents these issues.

Q2

What happens if I overtighten a battery terminal bolt?

Overtightening a battery terminal bolt can damage the battery post, potentially cracking it or stripping the threads within the terminal clamp. This can lead to a weak connection, poor starting, or even a complete loss of power. In some cases, the battery can become unserviceable and require replacement.

Q3

Where can I find specific torque specifications for components not listed?

While this document covers common torque specifications, for unlisted or more specialized components (like sensors, modules, etc.), refer to the official 2011-2017 Buick Regal repair manual for specific torque requirements. If a manual isn't available, consult a dealership or a certified mechanic experienced in working with this make/model.

Q4

Can I reuse electrical bolts?

While most electrical bolts can be reused if they are not damaged, it is generally recommended to replace self-locking nuts and bolts (those with a built-in washer or locking element) whenever they are removed, especially those that are critical to the vehicle's safety systems. This will ensure that they still maintain proper torque and don't loosen over time. Clean the mating surface to reduce corrosion.

Q5

What type of tool do I need for torquing electrical bolts?

You will need a torque wrench for accurate torque application. For smaller connections, a smaller 1/4" drive torque wrench is recommended. Ensure your torque wrench is calibrated to provide correct readings. Using an impact wrench is highly discouraged for electrical connections, as it will not provide accurate torque and is very likely to damage the component.

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 (3/8" Drive)

A calibrated torque wrench is essential for accurately tightening fasteners to the specified torque values. A 3/8" drive is suitable for most electrical connections.

  • Click-type or digital readout
  • Wide torque range (e.g., 5-80 ft-lbs)
  • Accurate within +/- 3%
Learn more

Torque Wrench (1/4" Drive)

A smaller 1/4" drive torque wrench is needed for lower torque specifications and smaller fasteners often found in delicate electrical connections.

  • Click-type or digital readout
  • Smaller torque range (e.g., 20-200 in-lbs)
  • Accurate within +/- 3%
Learn more

Socket Set (Metric)

A comprehensive set of metric sockets to fit various sizes of electrical connectors and terminal bolts/nuts.

  • Shallow and deep sockets
  • Sizes ranging from 6mm to 19mm
  • 6-point sockets preferred for better grip
Learn more

Extension Bars

Extension bars help reach fasteners located in confined areas or at difficult angles.

  • Various lengths (e.g., 3", 6", 10")
  • Secure locking mechanism
  • Durable construction
Learn more
Service Procedures

Ground Terminal Torque Procedure

This procedure outlines how to properly torque electrical ground terminals on the vehicle’s chassis and engine components. Over-torquing or under-torquing ground points can cause electrical issues.

  • Locate the specific ground terminal(s) in question using the vehicle's service manual.
  • Clean the terminal and mounting surface of any dirt or corrosion.
  • Position the ground terminal on the mounting point.
  • Using the appropriate size socket, apply the specified torque using a calibrated torque wrench. Refer to the service manual for specific torque values, typically ranging from 8-12 ft-lbs or 10-16 Nm.
  • Confirm proper torque setting by re-checking the torque one final time. DO NOT over torque.
View full procedure

Battery Terminal Torque Procedure

This procedure covers proper tightening of battery cable terminals and related hardware. Improper torque can lead to loose connections, high resistance, and electrical system problems.

  • Ensure the battery is disconnected.
  • Clean the battery terminals and cable connectors using a wire brush and baking soda solution.
  • Position the cable connector onto the battery terminal post.
  • Install the bolt/nut and tighten it by hand until snug.
  • Use a torque wrench with the correct socket size to tighten the nut/bolt to the manufacturer specified torque, typically between 8-10 ft-lbs or 10-14 Nm. Do NOT over torque.
  • Double check for proper connections. Confirm all nuts and bolts are securely torqued.
View full procedure

Connector Body Retaining Bolt Torque Procedure

This process details the proper torque of retaining bolts on various electrical connector bodies, like the ECM, BCM, or junction blocks, ensuring secure connection and preventing water ingress. Improper torque can lead to connection issues and short circuiting.

  • Locate the connector and retaining bolt in question.
  • Using the appropriate socket size, apply the proper torque using a calibrated torque wrench. Refer to the service manual for specific torque values, these are typically very low, ranging from 4-6 ft-lbs or 5-8 Nm.
  • Do not over tighten the bolt, as damage to the connector housing may occur.
  • Confirm proper torque setting by re-checking the torque one final time.
View full procedure
Technical Service Bulletins

ECM Connector Corrosion Issues

2014-05-12

Some 2011-2014 Buick Regal models may experience corrosion of the Engine Control Module (ECM) connector pins due to water intrusion. This can cause intermittent electrical issues, drivability problems, and diagnostic trouble codes.

2011-2014

Resolution: Inspect the ECM connector for corrosion. Clean or replace the connector and seal as needed. Apply dielectric grease to all connector pins after repair. Ensure that the retaining bolt is torqued properly to 6 ft-lbs.

BCM Ground Connection Problems

2016-11-20

Intermittent electrical issues related to Body Control Module (BCM) may be caused by inadequate ground connections on 2012-2016 Regal models. This can lead to a variety of electrical symptoms including interior lighting flickering, intermittent power windows, or radio malfunction.

2012-2016

Resolution: Locate the BCM ground points. Clean the ground surfaces and ensure all ground connections are tight and free of corrosion. Torque ground bolts to 10 ft-lbs.

About the Author

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Alan Montanye - Automotive Technical Specialist
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Alan Montanye

Automotive Technical Specialist

ASE Master Certified Technician with over a decade of hands-on experience in automotive repair and diagnostics.

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  • All specifications, including torque values, fluid capacities, and maintenance procedures, should be verified against your vehicle's factory service manual.
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