Recent content by Ld056

The Dorman plugs are just made incorrectly .They are actually .625" at the closed end, and flare out to .650" at the open end. Ain't no way that oversized plug is going to fit in that hole. That's why I'm asking where to get other types. I already know how to install them, just need a quality...

Does anyone know where to get the proper plugs for a Flathead Mercury V8, with the 5/8" clean out holes in the crankshaft ? I have Dorman Number 555-010 Plugs, but I don't see HOW they could possibly fit since they are slightly larger than the 5/8" hole ! I've ruined 2 plugs already. Any help...