Leakage Points

Examine the following areas for oil leakage:

Underhood
- valve cover gaskets
- intake manifold gaskets
- cylinder head gaskets
- engine front cover gasket
- camshaft position sensor O-ring
- oil level indicator tube connection
- oil pressure sensor
- oil bypass filter

Under Engine-with Vehicle on Hoist
- oil pan gasket
- oil pan front and / or oil pan rear seal
- crankshaft front seal
- crankshaft rear oil seal

WITH TRANSAXLE AND FLYWHEEL REMOVED
Oil leaks at crimped seams in sheet metal parts and cracks in cast or stamped parts can be detected when pressurizing the crankcase.

NOTE: Air leakage in the area around a crankshaft rear oil seal does not necessarily indicate a crankshaft rear oil seal leak. However, if no other cause can be found for oil leakage, assume that the crankshaft rear oil seal is the cause of the oil leak.

- crankshaft rear oil seal
- crankshaft rear oil seal retainer
- camshaft rear bearing covers and/or pipe plugs at the end of oil passages

NOTE: Light foaming equally around valve cover bolts and crankshaft seals is not detrimental and no corrections are required.