The only measurements given in the standards book for new std rings are:-
Thickness of compression ring = .093" - .094" clearance of ring in groove .002" - .004"
Thickness of scraper ring = .124" - .125" clearance of ring in groove .001" - .003"
Thanks Ron
I have been trying to measure my by stuffing stacks of feeler gauges. The compression ring and the oil ring both had the very thin rings positioned on the bottom of the ring. These rings just drop through the bore. So as suggested someone was probably trying to make up for an undersized ring.
My ring gap on the compression ring is about 0.020. Probably best to get a new piston ring set.
Thanks again