Why are my used .020" over AE pistons ring land groove clearances so large at .006" on my MK3 ? They are supposed to be at .001" , does that sound right? If so ,wow a big difference. Everything else seems to be worn but OK.
Why are my used .020" over AE pistons ring land groove clearances so large at .006" on my MK3 ? They are supposed to be at .001" , does that sound right? If so ,wow a big difference. Everything else seems to be worn but OK.
As stated, the pistons are worn out and need to be replaced.
FWIW, are you sure that they are supposed to be .001"? Sounds awfully tight for a street engine .002-.004" is a typical figure. But, in either case, those pistons are now best used as ashtrays.
I have a pair of Hepolites on my shelf and you can MAYBE force in a .002" between the ring and the ring land in some places but not in others (the average is less than .002"). So maybe it depends on the Hepolite piston being measured. The JE pistons definitely measure tighter than that.
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