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Re: Car Engine Problems, Help Please...
It might help to know what kind of knocking it is. If its a valve tap, try switching to a slightly thicker oil, but just go one step.
If its an ignition knock, like pinging, it could be the EGR valve, ignition timing, or excessive carbon buildup.
If its a physical engine knock like a bearing or piston, bad news. Its a full teardown and rebuild. You might be able to get away for several thousand more miles with just bearings, but either way you're looking at a bottom end rebuild and might as well do it right and just do the whole thing.
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