call this noise tappet noise. It goes away usually after the engine warms up.
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2001 Pontiac Firebird
Question: When I first start it it makes a pinging or tapping noise, I think we used to
Answer #1Pay it forward February 12, 2012, 13:27Enthusiast
The oil is too thick and needs changed.If it only does it when it's cold.
Answer #2Cassels from Cassels Garage, February 13, 2012, 04:53Enthusiast
Could be oil related. May have valve lifter that takes a while to pump up. But most likely it is an exhaust leak at the manifold. They can make a fairly heavy tapping/pinging noise cold. The manifold warms up & expands, thus the noise goes away.