- paul-ryan.info Oil may seep frombetween the cylinderhead and block if thehead gasket betweenthem has failed. The sump gasketmay be in severalparts - one of themcan be broken ordistorted. Look around the edges of therocker cover for gasket leaks. A leaking sumpplug may beloose, or have adamagedwasher.

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Checking for oil leaks

If an engine needs topping up with fresh oil more than usual, or if you see a pool of oil...