before you go and condem the engine make sure there are no loose or broken parts on the engine or its accessories. A simple broken weld on a catalytic converter heat shield can make a loud and unbearable rattling sound.

Your sound could bne anything. I doubt its a broken cam becasue the engine still runs good. One possible casue may be a failed timing chain tensioner and the rattling sound you hear is the timing chain bouncing against its case.


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