Chevrolet Caprice Engine Mount Guide: 1987-1991 Replacement
Eliminate engine vibrations and clunking noises by choosing the right engine mount for your Caprice.
- Symptoms of a bad mount include clunking on acceleration and vibration at idle.
- Always replace engine mounts in pairs (left and right) to avoid future problems.
- Consider replacing the transmission mount at the same time for a complete fix.
- Choose between standard rubber mounts for comfort or polyurethane mounts for maximum durability.
Is Your Caprice Engine Mount Failing?
A worn-out engine mount on a B-Body Caprice makes itself known. The signs are hard to ignore and usually start as minor annoyances before getting worse. If the rubber or internal fluid has failed, the mount can no longer dampen vibrations or control engine movement.
Common Symptoms:
- Excessive Vibration: You'll feel a noticeable vibration through the steering wheel, floor, or seats, especially when the car is idling in gear at a stoplight.
- Clunking or Thudding Noises: A loud 'clunk' or 'thud' from the engine bay when you accelerate, decelerate, or shift between Drive and Reverse is a classic sign. This is the sound of the engine lifting or shifting and hitting the frame.
- Visible Engine Movement: With the hood open, have a helper put the car in Drive (with their foot firmly on the brake) and briefly rev the engine. If you see the engine lurch or lift more than an inch or two, the mounts are likely shot. 🎬 Watch: How to locate and diagnose a bad engine mount
A Note on Safety
While a failing engine mount isn't likely to let the engine fall out, the excessive movement can damage other components. Hoses, wiring, and exhaust parts can be stressed, leading to more expensive repairs down the road. It's best to address this issue promptly.
Choosing the Right Aftermarket Engine Mount
Since Original Equipment (OE) mounts from GM are likely discontinued or very hard to find for this era of Caprice, the aftermarket is your go-to source. Aftermarket parts offer the same or better performance than original parts for less money. Your choice comes down to your budget and performance needs.
Brand Quality Tiers
Economy & Standard Replacement (Good):
- Anchor, DEA, Westar: These brands are widely available and very affordable. They are designed to be direct, factory-style replacements. Forum and user reviews are mixed; some owners report they work fine for years, while others have experienced premature failure like cracked rubber. They are a practical choice for a daily driver on a budget, 🎬 See this guide on budget-friendly engine mounts and oil pans but quality can be inconsistent.
Quality Replacement (Better):
- Pioneer: This brand has a reputation for producing quality rubber mounts that are often visually and functionally similar to the original factory parts. If you want a standard rubber mount with a potentially more reliable track record than budget options, Pioneer is a solid choice.
Performance & Heavy-Duty (Best):
- Energy Suspension: This brand specializes in polyurethane components instead of traditional rubber. Polyurethane is extremely durable and resistant to oil and chemicals that destroy rubber mounts. It will control engine movement much more effectively, which is great for performance driving. The trade-off is that polyurethane is stiffer, which can transmit more engine vibration into the cabin. Choose this if you want a permanent solution and don't mind a slight increase in engine feel.
Pro Tip: Replace in Pairs
Your Caprice has two engine mounts (left and right). It is highly recommended to replace both at the same time, even if only one has failed. A new mount on one side will put extra stress on the old one, causing it to fail soon after. Also, consider replacing the transmission mount at the same time for a complete drivetrain refresh.
Cost of Replacing Engine Mounts on a 1987-1991 Caprice
| Item | Estimated Cost |
|---|---|
| Aftermarket Engine Mount (Single) | $15 - $45 |
| Shop Labor | $150 - $300 |
| Total Professional Replacement (Parts & Labor) | $180 - $390 |
| DIY Replacement (Parts Only) | $30 - $90 (for a pair) |
Frequently Asked Questions
How many engine mounts does my Caprice have?
Your 1987-1991 Caprice has two main engine mounts, one on the left (driver's side) and one on the right (passenger's side). It also has one transmission mount at the rear of the transmission, which serves a similar purpose.
Should I use rubber or polyurethane mounts?
Choose rubber (like Anchor, DEA, Westar, or Pioneer) if you want to maintain the original smooth, quiet ride. Choose polyurethane (Energy Suspension) if you prioritize durability and performance and can tolerate a potential increase in engine vibration.
Can I replace just one failed mount?
You can, but it's not recommended. The new mount will be stiffer and taller than the remaining old one, putting uneven stress on the engine block and the old mount, which will likely cause it to fail soon. Always replace them in pairs.
Is it hard to replace Caprice engine mounts myself?
For a DIYer with the right tools, it's a manageable job. You will need a good floor jack, jack stands, a block of wood to protect the oil pan, and a good wrench/socket set. Access to the bolts can be tight, but the process of supporting the engine, unbolting the old mounts, and installing the new ones is straightforward.
🎬 Watch: Step-by-step walkthrough for replacing GM clamshell engine mountsHelpful Videos
Technical Specifications
The 1987-1991 Caprice uses a two-bolt or three-bolt 'clamshell' style engine mount. The mount consists of a metal housing and a rubber insert that isolates vibration. Some aftermarket replacements may require you to reuse your original metal clamshell housing.
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.
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