A Jeep Grand Cherokee Owner's Guide to Engine Mount Replacement (2012-2021)
Experiencing vibrations or clunking noises in your Grand Cherokee? Your engine mounts might be the culprit.
- The most common symptoms of failure are excessive vibration at idle and a clunking noise when accelerating.
- Visually check for reddish-brown fluid leaks on the subframe below the engine; this is a definitive sign of a failed OEM hydraulic mount.
- For best results and to avoid vibration issues, OEM Mopar mounts are strongly recommended over cheaper, solid rubber aftermarket alternatives.
- Always replace engine mounts in pairs to ensure proper alignment and prevent premature wear on the new mount.
Is Your Grand Cherokee Shaking? Signs of a Bad Engine Mount
A failing engine mount on the WK2 Grand Cherokee makes itself known in several ways. Because the original mounts are hydraulic (fluid-filled), they have unique failure symptoms compared to basic rubber mounts.
- Excessive Vibration at Idle: This is the most common complaint. You'll feel a deep vibration through the steering wheel, seats, or floor, especially when the vehicle is in gear (Drive or Reverse) at a stop.
- Clunking or Thumping Noises: A distinct "clunk" or "thud" from the engine bay when you accelerate from a stop, shift gears, or brake is a strong indicator. This is the sound of the engine shifting and hitting its limits.
- Visible Fluid Leaks: A tell-tale sign is finding reddish-brown, oily fluid on the subframe or front differential housing. This is the hydraulic fluid leaking from the collapsed mount. The passenger-side mount is particularly known for this type of failure. 🎬 Watch: How to replace the passenger side engine mount.
- Engine Lurching: If you have a helper, you can check for excessive movement. With the hood open and the parking brake on, have them hold the foot brake, shift into Drive, and briefly apply a small amount of throttle. If the engine lifts or jumps more than an inch or two, a mount has likely failed.
Don't Mistake It for Other Issues
Clunking noises on acceleration can also be caused by a stretched transfer case chain or worn suspension parts like control arms, which are also known issues on the WK2 platform. If you only have a clunking noise without the associated vibrations or fluid leaks, further diagnosis is recommended.
Choosing the Right Aftermarket Engine Mount
When replacing engine mounts on your Grand Cherokee, the choice between OEM and aftermarket is critical. The original Mopar mounts are hydraulic to provide a smooth, vibration-free ride. Many aftermarket options are solid rubber, which can drastically change how your vehicle feels.
Brand Quality Tiers for Your Jeep
Tier 1: Mopar (OEM)
This is the original part your Jeep was built with. It is a hydraulic mount designed specifically to handle the vibration characteristics of your engine. While it's the most expensive option, choosing Mopar is the surest way to restore the original ride quality and avoid issues with increased vibration. Given the mixed results with aftermarket parts, Mopar is the most recommended choice for this specific component.
Tier 2: Crown Automotive
As a brand that specializes in Jeep replacement parts, Crown is often considered a higher-quality aftermarket option. While some users report good results, others have noted that the quality can be inconsistent and may not fully match the refinement of a Mopar part. If you're looking for a step up from budget brands but want to avoid the full cost of Mopar, Crown is a potential middle ground.
Tier 3: Economy Brands (Anchor, Westar, DEA, Pioneer)
These brands offer the most budget-friendly prices. However, the trade-off is often in quality and performance. Forum discussions and reviews frequently mention that these mounts can cause a significant increase in cabin vibration (NVH), likely because they are solid rubber instead of hydraulic. Reports of premature failure, poor fitment, and increased noise are common. While they may secure the engine, they are unlikely to provide the same comfort as the original hydraulic mounts.
A Note on Technical Service Bulletins (TSBs)
Jeep issued a TSB (09-015-22) for the next-generation 2021-2022 Grand Cherokee (WL) to address vibration at idle by installing updated engine mounts. While this doesn't apply directly to the WK2, it shows that engine mount design is critical for controlling vibration and that the manufacturer continues to refine these parts. This reinforces the idea that using a high-quality, application-specific mount is important.
Engine Mount Replacement Cost (2012-2021 Grand Cherokee)
The cost can vary significantly based on the parts you choose and who performs the labor. The job typically involves supporting the engine, removing the old mounts, and installing the new ones, which can take a few hours.
| Part | Estimated Cost |
|---|---|
| New OEM (Mopar) Mounts (Pair) | $200 - $400 |
| New Aftermarket Mounts (Pair) | $115 - $200 |
| Shop Labor | $300 - $600 |
| Total Estimated Cost | $415 - $1000+ |
Note: Labor costs can vary by region. Dealer labor rates will be higher than independent shops.
Frequently Asked Questions
Do I need to replace both engine mounts at the same time?
It is highly recommended. Engine mounts wear at a similar rate. If one has failed, the other is likely not far behind. Replacing them in pairs ensures proper engine alignment and prevents the new mount from being put under excessive strain, which could cause it to fail prematurely.
Are the engine mounts different for the V6 and V8 engines?
Yes, the mounts for the 3.6L V6, 5.7L V8, and other engine variants can have different part numbers. It is crucial to verify you are purchasing the correct mount for your specific engine and drivetrain (RWD vs. 4WD) to ensure proper fit and function.
What is a hydraulic engine mount?
A hydraulic mount is a specialized rubber mount that contains a fluid-filled chamber. This design allows it to absorb a wider range of vibrations than a simple block of solid rubber, leading to a smoother and quieter ride. The downside is that they can leak and fail, which is a common issue on the Grand Cherokee.
Can I install engine mounts myself?
For an experienced DIY mechanic, this is a manageable job. It requires a good set of tools, jack stands, and a floor jack to safely support the engine. However, accessing the bolts can be difficult, especially on the driver's side. 🎬 Watch this complete V6 engine mount replacement walkthrough. If you are not comfortable supporting the weight of the engine, it is best to leave this job to a professional.
🎬 See how to replace 5.7L Hemi mounts in your driveway.Helpful Videos
Technical Specifications
OEM Part Numbers: 68375805AG 68375806AG 68110950AC
The OEM mounts for the 2012-2021 Jeep Grand Cherokee are typically hydraulic (fluid-filled) to dampen vibration. Aftermarket options are often solid rubber, which can increase cabin noise and vibration.
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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.
- Jeep Grand Cherokee:
- 🎬 Helpful Videos
- 🛍️ Shop This Part
- Is Your Grand Cherokee Shaking? Signs of a Bad Engine Mount
- Don't Mistake It for Other Issues
- Choosing the Right Aftermarket Engine Mount
- Brand Quality Tiers for Your Jeep
- A Note on Technical Service Bulletins (TSBs)
- Engine Mount Replacement Cost (2012-2021 Grand Cherokee)
- Frequently Asked Questions
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