hi just got a combat month ago been reading up on your topics finally figured i needed to pull barrels check rings. lot of smoke and fouled plugs. one compression ring broke original rings had everything measured a ok.got standard rings and other parts from old brits .heres my question finally.compresion ring and scraper rings fit perfect .011 gaps. trouble oil ring doesnt fit in the groove. to late to call old brits . i even tried fitting old 3piece oil ring back the old and new ring fit only above the piston pins not the front or back of pistons. the new ring is 2 piece 1 wire spring and 1 solid with grooves from andover. do i have to heat piston to put ring on ? all carbon was cleaned. tried both new rings whats up? thanks