Acura Repair Questions? Ask a Mechanic for Answers ASAP
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Is this a pinging or knock, where do you think the noise is coming from?
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Engine noises can be caused by a few different things, collapsed lifters or excessive valve clearance, piston slap, rod knock from a spun rod bearing. I have seen flywheel rivets come loose causing a knocking noise.
This is tough to diagnose without being there to actually hear it.