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What Happens if You Don't Replace a Damaged Valve Cover?
Ignoring a cracked or failing valve cover can lead to serious engine trouble. The valve cover keeps oil inside the engine and protects vital components from debris. If your Jeep Grand Cherokee shows signs of oil leaks or performance drops, a faulty valve cover could be to blame.
Signs to Get a New Valve Cover
1. Oil Leaks Around the Valve Cover
Visible oil seeping from the edges is often a clear sign the valve cover or gasket is failing.
2. Burning Oil Smell
If leaking oil drips onto hot engine parts, it can create a strong burning odor while driving.
3. Dirty or Contaminated Spark Plugs
Oil leaking through a bad valve cover can foul your spark plugs, reducing ignition performance.
4. Engine Misfires or Rough Idling
Oil contamination or air leaks near the valve cover can interfere with cylinder firing.
5. Check Engine Light Activation
Sensor issues caused by oil exposure can trigger your dashboard’s warning lights.
6. Visible Cracks or Warping
If the valve cover itself is cracked or warped, it won’t seal properly and needs to be replaced.
Already seeing oil near your spark plugs? It may be time to replace both the cover and the plugs. Find OEM spark plugs made specifically for your Jeep for a clean ignition and smooth drive. For help identifying the right part, the Canada Mopar Parts team is here to help. Contact us today for expert support.