I have a BMW M3 and I've noticed that the engine has been making a loud rattling sound when I start it up. It goes away after a few minutes of driving but I'm concerned it might be something serious. Has anyone experienced this issue and knows how to fix it?
ReplyHi John, it's possible that your engine is just cold and needs to warm up. However, if the rattling persists after the engine is warm, it could be a sign of a larger issue. I recommend taking it to a qualified mechanic to have it checked out.
John, I've had the same problem with my M3. It turned out to be a failing tensioner for the timing chain. It's a common issue with BMW engines and can be fixed by replacing the tensioner.
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