Rear Crankshaft Oil Seal
Fits all 65-80 engines
A note of warning: The rear crankshaft oil seal is notorious for leaking on the MGB engine.
When installing a new oil seal make sure that the oil seal surface of the crankshaft is perfectly smooth. If it is rough, rusty, grooved, or otherwise damaged, your engine WILL leak oil out of the back end.
It does not matter that you are putting in a new seal. If the surface of the crankshaft where the seal rides is imperfect the seal will leak!