Was it easier to change/check spark plugs only on a R-4360 as compared to a R-3350?... I spent my 1st 5 years as a Recip Engine mechanic in the Philippines working MAC Enroute. West Virginia and Wyoming AirGuard flew Connies, R4360s on the C-124 was so much easier period !!
Oh, yes COOPER RUN OUT. The R-3350 was notoriously over heading. Between the bottom of the spark plug and the cylinder spark plug port, what is the copper ring, with the appearance of a washer, but actually, it was a gasket. The cylinder would get so damn hot copper would melt migrate down through the threads and caused cylinder failure in turn engine failure.
Compared to the R-4360, the R-3350 was a giant pain in the a** !