Leakage Points

Examine the following areas for oil leaks:

UNDERHOOD
- valve cover gaskets
- intake manifold gaskets
- head gaskets
- oil bypass filter
- oil filter adapter
- engine front cover
- oil pump and filter body
- distributor O-ring
- oil level indicator tube connection
- oil pressure sensor

UNDER ENGINE-WITH VEHICLE ON HOIST
- oil pan sealer
- oil pan rear seal
- engine front cover gasket
- crankshaft front seal
- crankshaft rear oil seal
- crankshaft main bearing cap side bolts
- oil pump and filter body

WITH TRANSMISSION AND FLYWHEEL REMOVED

NOTE:
- Air leakage in 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 crankshaft rear oil seal is the cause of the oil leak.
- Light foaming equally around valve cover bolts and crankshaft seals is not detrimental and no corrections are required.

- crankshaft rear oil seal
- rear main bearing cap parting line
- rear main bearing cap and seals
- flywheel mounting bolt holes (with flywheel installed)
- camshaft rear bearing covers and or pipe plugs at the end of oil passages