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Q: Loud noise from under valve cover

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There is a loud rattling, knocking noise coming from underneath the left valve cover.

With this symptom, you will likely need to check your oil level. If the oil level is okay, you may have internal engine problems, which need to be inspected further. If you would like to have this inspected, a certified mechanic from YourMechanic can come to your home or office to diagnose the rattling noise and make the necessary repairs.

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