Quote:
Originally Posted by steve25
If you're considering reusing those Pistons then one of the most important clearances to check is the ring-to-ring groove clearance for both compression rings.
Anything over .003" and it's new piston time.
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Mikes reply:
My research so far, watching a video, found this:
If you have a 4" Piston and you set your gap to 3.5 thousand /inch of the Piston diameter = .014 gap.
So, now the Piston is worn about the upper 2" of the cyl. wall from the top down, I add .014" to .003" = .017" Ring gap (measuring both compression rings, the same way) thus, over .017 ring gap and I need to replace the Pistons. Is there something called oversized rings to consider first, before discarding the existing Pistons, if they are in re-useable condition? In addition is there a tolerance from .014" to add to the original ring gap to consider in the first place? For example, .014"-.017" original ring gap.