What is the torque spec on the axle nut of a 2012 Impala?
On a 2012 Impala, the front axle nut is typically torqued to about 177 ft-lbs (240 Nm). Exact torque can vary by engine and drivetrain configuration, so always verify with the GM service manual for your specific vehicle.
The axle nut secures the CV axle to the wheel hub and sets the bearing preload that keeps the front wheel assembly properly aligned. Using the correct torque is essential to prevent bearing wear, wheel wobble, or hub loosening over time. This article outlines the official spec, potential variations, and proper tightening procedures for the 2012 Impala.
The official torque specification
General guidance from GM service documentation for the 2012 Impala points to a typical front axle nut torque of 177 ft-lbs (240 Nm). Because Impalas can have different engines or minor drivetrain differences within the same model year, always consult the exact VIN-specific service data in the factory manual or an authorized GM service database for your car.
Note: Some service procedures may include re-torquing after an initial drive or after the bearing seats, and may require using a new locknut or a retaining device (such as a cotter pin or locking tab) as specified by GM. Always follow the instructions that accompany your particular repair procedure.
Engine and drivetrain variations
Torque values can vary slightly depending on the engine family (for example, different V6 configurations used in various model years) and any specific GM service bulletin for the axle nut. The 2012 Impala is commonly equipped with front-wheel drive and independent suspension, with a front axle nut that generally falls near the 177 ft-lb range, but VIN-specific data should be checked for absolute accuracy.
What to verify before tightening
Before tightening, confirm the exact specification for your vehicle by consulting the GM service manual or the dealer ERS/TechLink database using your VIN. Always ensure you are using the correct nut type, clean threads, and that any required locking device is properly installed if your procedure calls for it.
How to apply the torque correctly
Follow these general steps to apply the torque correctly, while referencing your factory procedure for any VIN-specific nuances:
- Prepare: remove the wheel, clean the hub threads, and ensure the nut seat is free of debris.
- Install the appropriate axle nut and any required locking device according to GM’s instructions.
- Torque: using a calibrated torque wrench, tighten the axle nut to the specified value (commonly around 177 ft-lbs / 240 Nm for the 2012 Impala, but verify for your car).
- Recheck: if the service manual requires it, recheck torque after the recommended break-in distance or mileage (as specified by the procedure).
Carrying out the procedure exactly as GM specifies helps ensure proper bearing preload, wheel alignment, and long-term reliability of the front axle assembly.
Summary
The typical front axle nut torque for a 2012 Chevrolet Impala is about 177 ft-lbs (240 Nm), but exact value can vary by engine and drivetrain configuration. Always confirm with the factory service manual for your VIN, follow any re-torque or locking-device instructions, and use a proper torque wrench to ensure safe, accurate tightening.
What is the torque spec for an axle nut?
There is no single torque spec for axle nuts; the correct value varies significantly based on the vehicle's make, model, and year, often ranging from 100 to 300 foot-pounds (ft-lbs). To find the correct spec, consult your vehicle's service manual or a reliable online source like AutoZone or a parts lookup tool, as using the wrong torque can lead to premature bearing failure.
How to find the correct torque spec
- Consult your vehicle's service manual: This is the most accurate source for your specific vehicle.
- Use a parts lookup tool: Websites for auto parts stores often have torque specifications for common parts like front wheel bearing assemblies.
- Check a reputable online source: Resources like BCA Bearings and YouTube provide torque specs for many models, but always verify the information for your specific vehicle.
- Use a professional resource: For a specific vehicle, a professional mechanic will have access to the most current and accurate information from manufacturer databases.
Why torque spec is critical
- Too loose: A nut that is too loose can cause premature bearing failure, noise, and play in the wheel.
- Too tight: Over-torquing can lead to excessive heat, pressure, and premature bearing failure.
- Proper preload: Correct torque sets the proper preload on the wheel bearing, which is crucial for its performance and longevity.
- Component alignment: Correct torque helps ensure proper alignment of the wheel hub, rotor, and other components.
Important installation tips
- Use a new nut: Always use a new nut when replacing a wheel bearing or hub assembly.
- Use a calibrated torque wrench: Ensure your torque wrench is properly calibrated and that you follow the manufacturer's instructions for use.
- Clean the axle shaft: Before installation, clean the splines on the axle shaft and the threads of the nut to ensure a clean and proper fit.
What is the torque on the axle nut on a 2012 Chevy Impala?
The 2012 Chevy Impala axle nut torque is 155 ft-lbs (210 Nm), but some sources also mention a 129 ft-lb specification followed by an additional 90-degree turn, depending on the specific part or service procedure. It is crucial to use a calibrated torque wrench and apply the brake to hold the rotor while torquing the nut to avoid damage.
This video demonstrates how to torque the axle nut on a 2012 Chevy Impala: 56sBlue Collar GarageYouTube · Oct 5, 2024
- Standard torque: The most frequently cited torque value is 155 ft-lbs (210 Nm).
- Alternative procedure: Some procedures specify torquing the axle nut to 129 ft-lbs, then tightening it an additional 90 degrees for proper preload.
- Important steps:
- Use a calibrated torque wrench to ensure accuracy and avoid damaging the new bearing or axle.
- Apply the brakes to hold the rotor steady while you tighten the axle nut.
- If you are replacing a wheel hub assembly, consult the instructions that come with the new part, as there can be variations.
What size is the CV axle nut on a 2012 Impala?
CV Axle Nut M27x2. 0 Self Lock NUT-29 for CHEVROLET Impala 00-12 (2-pack)
What are the specs of a 2012 Impala?
The 2012 Chevrolet Impala is a full-size sedan featuring a 3.6L V6 engine that produces 300 horsepower, paired with a 6-speed automatic transmission. It has front-wheel drive and an EPA-estimated fuel economy of 18 MPG in the city and 30 MPG on the highway. Key specifications include a length of 200.4 inches, a wheelbase of 110.5 inches, and a curb weight of 3,555 pounds.
Performance and fuel economy
- Engine: 3.6L V6
- Horsepower: 300 hp @ 6,500 rpm
- Torque: 262 lb-ft @ 5,300 rpm
- Transmission: 6-speed automatic
- Drivetrain: Front-wheel drive
- EPA-estimated MPG: 18 city / 30 highway
- Fuel Type: Flex-fuel (unleaded/E85)
Dimensions and weight
- Length: 200.4 inches
- Width: 72.9 inches
- Height: 58.7 inches
- Wheelbase: 110.5 inches
- Curb Weight: 3,555 pounds
- Trunk Volume: 18.6 cubic feet
Interior and safety
- Passenger Capacity: 5
- Front Headroom: 39.4 inches
- Front Legroom: 42.3 inches
- Rear Headroom: 37.8 inches
- Rear Legroom: 37.6 inches
- Safety: Standard electronic stability control, anti-lock brakes, and front-seat side-impact airbags
