Kent - There is no oil seal in your engine. There is an oil slinger, just a disc on the rear of the crankshaft, which slings oil from the rear main bearing into a groove in the crankcase and the rear main bearing cap. There is a drain hole in the bearing cap which conducts the oil back to the crankcase. It is probably plugged with sludge. You should drain the oil, drop the oil pan, support the crankshaft from below, remove the rear main bearing cap, and clean out the hole. Some leakage from the rear area is not uncommon, and in 1932, Cadillac added another drain path for the oil at the rear of the oil pan to try to cure the problem. When you replace the main bearing cap, pay close attention to the two square wooden plugs, one on each side of the cap where it fits into the crankcase. These will also leak oil if not properly installed. They should be pressed into the bearing cap, then when the cap is in place in the crankcase, drive a pointed piece of 1/16" wire all the way through the wooden plugs to expand them against the crankcase. This should cure your problem. Paul Ayres
