Sometimes when oil leaks from a valve cover gasket it leaks all the way down to the spark plug well and eventually seeps inside the spark plug tubes. This will cause a misfire or reduce engine performance. It can also cause a fire under your hood if it goes unrepaired.
What Are the Symptoms of a Bad Valve Cover?
1. Visible Oil Leaks in the Valve Cover Area. Oil leaks don't always show up as black puddles on your garage floor. ...
2. Low Oil Levels. Engine oil is the lubricant that lets parts smoothly slide alongside each other to prevent friction and breakdown. ...
3. Burning Oil Smell.
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