Tapping sound from engine

embergloP51

Active member
It's a 66 with a 200 I6. It starts tapping as soon as the engine turns over and increases with RPMs, so I'm thinking that this a valve problem.

Has anybody had this? The valves are non adjustable so I don't know how I'd check or fix this problem?

Could it be something other than the valves?
 
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