Chevrolet Malibu Engine Mount Guide: 1975-1979 Models
Stop excessive engine vibration and clunking noises by choosing the right replacement engine mounts for your classic Malibu.
- Symptoms of failure include heavy vibration, clunking noises, and visible engine rocking.
- For most owners, a standard rubber replacement mount from a brand like Pioneer, Anchor, or Westar is the best choice.
- Performance polyurethane mounts from Energy Suspension are for racing and will make the ride harsher.
- Always replace the transmission mount at the same time as the two engine mounts for best results.
Is Your Malibu's Engine Trying to Escape? Signs of Bad Mounts
When engine mounts wear out, the rubber cracks and separates. This leads to noticeable problems. If you experience these symptoms, it's time to inspect your mounts.
- Heavy Vibration: You'll feel a lot of shaking inside the car, especially when idling at a stoplight. This is the most common sign of a failing mount.
- Clunking or Banging Noises: Loud clunks when you accelerate, decelerate, or shift from drive to reverse mean the engine is moving too much and hitting other parts.
- Visible Engine Movement: Open the hood and have a friend safely apply the brakes, shift into drive, and lightly press the gas. If the engine lifts or rocks more than an inch or two, the mounts are likely bad. 🎬 Watch: See these symptoms and learn how to test your mounts.
A Note on OEM Parts
For a classic vehicle like the 1975-1979 Malibu, original "New Old Stock" (NOS) GM parts are extremely rare and expensive. The aftermarket is the primary source for new engine mounts. Aftermarket parts from reputable brands meet or exceed the original specifications and are widely used by mechanics and restoration shops.
Choosing the Right Aftermarket Engine Mount
Not all aftermarket mounts are the same. They fall into two main categories: standard rubber replacements and performance polyurethane upgrades.
Brand Tiers for Your Malibu
| Tier | Brands | Best For |
|---|---|---|
| Standard Replacement | Anchor, DEA, Westar, Pioneer | Daily driving and restoring the original, smooth factory ride. These are affordable and designed to fit just like the original parts. Forum users sometimes report mixed quality on the most affordable options, but Pioneer is often reviewed favorably for fit and quality. |
| Performance Upgrade | Energy Suspension | Performance, racing, or hot rod builds. Made from durable polyurethane, these mounts are much stiffer than rubber. They provide better throttle response but will transfer more engine vibration into the cabin, resulting in a rougher ride. |
| Specialty / Racing | Quick Time | Primarily known for bellhousings and mid-plates for engine swaps and high-performance racing applications, not standard replacement mounts. |
Frequently Asked Questions (FAQ)
How many engine mounts does my 1975-1979 Malibu have?
Most V8 and inline-6 models from this era have two engine mounts, one on each side of the engine, and one transmission mount at the rear of the transmission.
What's the difference between rubber and polyurethane mounts?
Rubber mounts, like the originals, are soft and absorb a lot of vibration for a comfortable ride. Polyurethane mounts are a hard plastic that offers superior durability and engine control for performance applications, but they significantly increase felt vibration.
Can I replace engine mounts myself?
Yes, this is a job a DIY mechanic can do. It requires a floor jack, jack stands, and a good set of hand tools. You must safely support the engine with the floor jack before unbolting the old mounts.
🎬 See this walkthrough for removing and replacing mounts on a Malibu.Are there any recalls for engine mounts on my Malibu?
No, there are no active or past recalls specifically for engine mounts on the 1975-1979 Chevrolet Malibu. A major GM engine mount recall in 1971 addressed a different mount design on earlier vehicles.
Helpful Videos
Technical Specifications
OEM Part Numbers: 3990918 3962740
The most common design for this vehicle is the GM 'clamshell' style mount, which consists of a metal housing and a rubber insert. Some performance versions may use a safety interlock design.
We Have This Part in Stock
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.