Looking at a 430 with an engine that knocks intermittently. It comes and goes. Any ideas? Engine has good oil pressure and runs fine otherwise. Piston? Piston pin? Thrust bearing? Any ideas I am trying to save from the salvage yard
 
If you're competing with scrap prices, buy it. Offer more than scrap and bring it home and figure it out. If you don't want it for $100 over scrap price, let me know where it is.
 
All it is is wrist pin , the wrist pin turns as motor runs thats why sometimes you dont here it.question answered.
 

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