I noticed that my Audi A4's engine has started making a strange knocking sound. It almost sounds like a ticking or tapping noise. What could be causing this and should I be worried?
ReplyIt's possible that the knocking sound is coming from the engine's valves. This can be caused by insufficient lubrication or buildup of sludge. I recommend getting your oil changed and using a high-quality oil to see if that solves the issue.
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