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   My first '40 and the venture

   I am attaching something I once read on clean spots on piston. It is a BMW forum , but it still is a gas engine. May help. https://www.bimmerforums.com/forum/showthread.php?2046010-Clean-Portion-On-Top-of-Each-Piston

   • Words: 41
   • 1969FJ
   • Post #10
   • Mar 26, 2023
   • Forum: 40- / 55-Series Tech