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This may be overstating the obvious, but what about this: Check the orientation of the rocker arms? One time as a novice engine builder I accidently put mine together wrong. They are marked, but I had them flipped Intake for exhaust. This caused a rattle localized to that side of the engine. I returned to their proper order and the rattle went away.




that is something to check too they should be offset to the middle of each pair

5947704-BBrockers.JPG (46 downloads)