Warning Signs the Valve Cover is Failing
- Oil leaks around the valve cover gasket
- Burning oil smell
- Engine misfires
- Rough idling
- Check engine light
How to Test if This Part is the Problem
- Visually inspect the valve cover and gasket for cracks or leaks.
- Check for oil residue around the spark plugs.
- Perform a compression test to rule out other engine issues.
- Use a smoke test to pinpoint the source of oil leaks.
Common Failure Causes for This Part
- Age and wear of the valve cover gasket
- Heat cycling causing the plastic to become brittle and crack
- Improper installation or over-tightening of bolts
- Clogged PCV valve causing excessive pressure