Guide to 2008-2018 Buick Enclave Engine Mount Replacement
Address clunks and vibrations in your Enclave by understanding its common engine mount issues.
- The passenger-side upper torque strut and the front hydraulic mount are the most common failure points.
- Symptoms include clunking on acceleration, vibration at idle, and visibly excessive engine movement.
- ACDelco is the recommended aftermarket brand for maintaining OEM ride quality; value brands may increase vibration.
- While there are no recalls, a Technical Service Bulletin (TSB) exists for vibration issues related to the mounts.
Is Your Enclave Showing Signs of Bad Engine Mounts?
A failing engine mount on a 2008-2018 Buick Enclave isn't subtle. These vehicles are known for having the front, rear, and passenger-side upper torque strut mounts fail. When a mount wears out, the engine can move excessively, leading to noticeable symptoms. Pay attention to these common signs:
- Clunking Noises: A distinct "clunk" or "thud" when you accelerate from a stop, or shift between Drive and Reverse is a classic sign. This is the sound of the engine shifting and hitting its limits.
- Excessive Vibration: You might feel a strong vibration through the steering wheel, floor, or seats, especially when idling in gear at a stoplight. This happens because the failed mount can no longer absorb the engine's natural vibrations.
- Harsh Shifting: What feels like a transmission problem can sometimes be a bad mount. The engine's movement can make gear changes feel rough and jerky.
- Visible Engine Movement: If you have a helper, you can observe the engine while they briefly put the car in gear with their foot on the brake. Excessive rocking or lifting of the engine is a clear indicator of a failed mount.
A Common Point of Failure
The passenger-side upper engine mount, often called a torque strut, is a very common failure point on the Enclave and its platform mates (GMC Acadia, Chevrolet Traverse). The rubber insert tears, allowing the top of the engine to flop back and forth during acceleration. Visual inspection often reveals the torn rubber.
Choosing the Right Aftermarket Mount
When replacing a failed mount, you have a choice between OEM and aftermarket parts. For the Enclave, the quality can vary significantly between aftermarket brands.
- Top Tier (ACDelco): As GM's own parts brand, ACDelco offers options that are often identical to the original factory part. Choosing an ACDelco Professional or Gold line part is the safest bet for retaining the original ride quality and vibration damping, as they are often hydraulic like the original.
- Value Tier (Anchor, DEA, Westar): Brands like Anchor, DEA, and Westar offer a more budget-friendly solution. While they will secure the engine, be aware that some of these value-oriented mounts may be made of solid rubber instead of being hydraulic. This can lead to a noticeable increase in cabin vibration compared to the OEM part. They are a functional repair, but may not restore the Enclave's original quiet ride.
What to Expect for Replacement Costs
The cost to replace an engine mount varies by location and which mount is being replaced. The front mount is generally more labor-intensive than the upper torque strut.
| Item | Estimated Cost |
|---|---|
| New Aftermarket Part | $47 - $155 per mount |
| New OEM Part | $117 - $235 per mount |
| Shop Labor | $222 - $326 per replacement |
| Total Professional Replacement | $404 - $561 (for one mount) |
Frequently Asked Questions
How many engine mounts does my 2008-2018 Enclave have?
The 3.6L V6 in the Enclave is typically supported by three main mounts (front, rear, and a transmission mount) and an upper torque strut mount (also called a dogbone mount) on the passenger side.
Can I replace just one bad engine mount?
Yes, you can replace only the failed mount. However, mounts tend to wear at a similar rate. If one has failed, the others may be weakened. If you replace one, the new, stiffer mount can put additional stress on the remaining older mounts, potentially causing them to fail sooner.
Is this a DIY-friendly repair?
Replacing the upper torque strut is relatively easy for a DIYer with basic tools. However, replacing the main front or rear mounts is more advanced. It requires safely supporting the engine with a floor jack and a block of wood while removing the old mount. If you are not comfortable with this procedure, it is best left to a professional mechanic.
Are there any recalls for Buick Enclave engine mounts?
No, there are no specific recalls for engine mounts on the 2008-2018 Buick Enclave. There is a GM Technical Service Bulletin (TSB 17-NA-166) that addresses a rough idle or vibration that could be caused by the engine mounts, providing a procedure for dealers to diagnose and correct the issue.
Helpful Videos
Technical Specifications
OEM Part Numbers: 25840458 (Upper Torque Strut) 25840452 (Front Mount) 25840450 (Rear Mount) 25840451 (Transmission Mount)
The primary front and rear mounts are typically hydraulic (fluid-filled) for optimal vibration damping. The upper mount is a rubber torque strut. The vehicle uses a total of four main mounting points to secure the transverse 3.6L V6 engine and transmission.
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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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