Re: 1937 115C mechanical refresh

Posted by Owen_Dyneto On 2019/2/27 10:17:48

Is the piston an autothermic strut controlled expansion type?

Is a maker's name or trade name cast on the underside of the head, for example "Bohnalite"?

If it's a factory piston the "C" indicates a 0.001" oversize beyond the standard size or a marked oversize. If a nominal oversize is indicated like "0.010" or "0.020", then the "C" indicates a 0.001" oversize over that size. If none is marked, then it's 0.001" over the standard size. See the shop manual for more details.