If your seal did in deed "PUSH OUT" I would check the crank case vent. I take it the engine runs fine otherwise? It will be interesting to know what you find! My brother had a mystery leak on a 1872 w/M18 after changing oil, leaked once and never again. I attributed it to over filling and causing a suction effect in the crankcase, like an improperly vented plumbing trap.
__________________
Clay
|