Larry Hyde
Member
About to re-assemble a 1650 with 3 7/8 bore sleeves. Got this with one busted sleeve, replaced it and it broke 3 sleeves after 1 1/2 hrs. Have had everything checked out. Both head and deck are flat, counterbores are proper depth, sleeve stand off is .0025. Everything magna fluxed for cracks. Old dealer and mechanics have no idea why they broke. Had 3 guys tell me it was due to wrong size fire rings in the head gasket. Standard gasket if fire rings were removed would fall through the counterbore. Gasket set I have now fits the counterbore. I figure I might as well re-assemble and see if they work. Anyone ever have this problem ? Any new ideas to check before I commit myself ?