Chevrolet Malibu G-Body Engine Mount Guide (1978-1988)
Stop that engine shake and restore the classic feel of your G-Body Malibu.
- The 1985 Malibu is a G-Body; search for '1978-1988 GM G-Body' parts for the best results.
- Choose your mount type based on your car's use: rubber for stock, polyurethane for performance street, and solid for race only.
- Replacement is difficult due to poor access to bolts; what seems like a simple job can be frustrating.
- Always replace the transmission mount at the same time as the engine mounts.
Signs of a Bad Engine Mount
When your Malibu's engine mounts fail, the signs are hard to ignore. The rubber inside the mount cracks, collapses, or gets saturated with oil, losing its ability to support the engine and absorb vibration. Look out for these common symptoms:
- Excessive Vibration: This is the most common sign. You'll feel a noticeable vibration through the steering wheel, floor, or seats, especially when the car is idling or when you first put it into gear.
- Clunking or Thumping Noises: Loud clunks or thuds from the engine bay when you accelerate, decelerate, or shift gears are a red flag. This is the sound of the engine moving and hitting other parts because the mount is no longer holding it securely.
- Visible Engine Movement: Open the hood and have a helper put the car in drive (with the brake firmly applied) and then reverse. If you see the engine lurch or lift excessively, the mounts are shot.
Choosing the Right Aftermarket Mount
Finding new original GM parts for a car of this age is nearly impossible. The aftermarket is your best and only real option. For your G-Body Malibu, you have three main choices, each with its own pros and cons.
1. Standard Rubber Mounts
These are direct replacements for the original factory mounts. They use a rubber insert inside a steel "clamshell" housing to absorb vibrations. This is the best choice for a daily driver or a stock restoration to maintain the original ride quality.
- Brands: Anchor, DEA, Westar
- Pros: Inexpensive, provides a smooth and quiet ride like the original.
- Cons: Not ideal for high-horsepower engines or aggressive driving as they allow more engine flex.
2. Polyurethane Mounts
Polyurethane is a type of plastic that is much stiffer than rubber. These mounts are a popular upgrade for performance-oriented cars. They significantly reduce engine movement, which improves throttle response and puts more power to the ground.
- Brands: UMI Performance, Energy Suspension
- Pros: Greatly reduces engine movement, durable, improves performance.
- Cons: Will transfer more engine vibration and noise (NVH) into the cabin compared to rubber. More expensive than standard mounts.
3. Solid Steel Mounts
As the name implies, these are made of solid steel with no vibration-absorbing material. They lock the engine directly to the frame. These are only recommended for dedicated drag racing or track cars where performance is the only goal.
- Brands: UMI Performance, Speedway Motors
- Pros: Zero engine movement, maximum power transfer.
- Cons: Extreme vibration and noise, not suitable for the street.
Cost of Replacement
The cost to replace engine mounts on a G-Body Malibu varies based on the parts you choose and who does the work.
| Part/Service | Estimated Cost |
|---|---|
| New Aftermarket (Standard Rubber) | $10 - $30 per mount |
| New Aftermarket (Polyurethane/Solid) | $100 - $170 per kit |
| Shop Labor | $200 - $400 |
| Total Professional Job | $250 - $550 |
Costs are estimates and can vary by location and shop. Labor costs reflect the difficult nature of this specific job.
Frequently Asked Questions
Is this a DIY job?
This can be a difficult job for a beginner. While it's a bolt-on process, the bolts holding the mounts to the frame are notoriously hard to access. You will need a good set of tools, including wobble extensions and universal joints, and you'll likely be working from underneath the car. If you are not comfortable with tight spaces and potentially rusted bolts, it's best to leave this to a professional.
Do I need to replace the transmission mount at the same time?
It is highly recommended. The transmission mount is made of the same material and is the same age as your engine mounts. If the engine mounts have failed, the transmission mount is likely not far behind. Replacing all three at once ensures the entire drivetrain is secure and properly aligned.
Are there any recalls for the engine mounts on my Malibu?
No, there have been no recalls or technical service bulletins (TSBs) issued by GM or the NHTSA for engine mounts on the 1978-1988 G-Body platform.
My Malibu is a 1985, but parts stores only list up to 1983. Will these parts fit?
Yes. The Chevrolet Malibu was produced on the G-Body platform from 1978 to 1983. However, other GM cars (Monte Carlo, Regal, Cutlass) used the same platform and engine mounts until 1988. When you search for parts, look for '1978-1988 GM G-Body' engine mounts; they are the correct parts for your car.
Technical Specifications
The most common aftermarket part number for a standard rubber replacement mount is Anchor 2292 or equivalent. These are a clamshell design, consisting of a steel housing with a rubber insert.
The information in this article is provided for general reference and educational purposes only. Vehicle specifications, procedures, and part compatibility can vary by production date, trim level, and region. Always consult your vehicle's factory service manual and verify part numbers before purchasing or performing repairs. Safety-critical components such as airbags, seat belts, and braking systems should be installed by a qualified professional.
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