Sorry, the web browser you're using is not supported by this website.

Please use Google Chrome, Firefox, Safari, or another browser to access homex.com. Thank you.

Skip to main content

We use cookies to enhance your experience. For details on how we use cookies, collect data, & how to manage your consent please see our Cookie Policy & Privacy Policy.

What does oil in spark plug well mean?

When a spark plug well fills with oil, it means that the O-ring that seals the well has started to leak. More often than not, the valve cover gasket and well seals need to be replaced, even if the leak can be fixed by tightening the valve cover bolts.

Let's Get It Fixed!

Our virtual experts can diagnose your issue (for free!) and resolve simple problems.

What Did You Think of This Article?

What Did You Think of This Article?

Shop Recommended ProductsShop HomeX Recommended Products