SUBJECT: Difficult Oil Leak Diagnosis Caused By Oil Seepage Past The Engine Oil Filter Adapter Plate Gasket
DATE: May 28, 1999
This bulletin involves the replacement of the engine oil filter adapter plate gasket.
NOTE: THIS BULLETIN APPLIES TO VEHICLES EQUIPPED WITH A 3.9L OR 5.2L ENGINE. ENGINES BUILT BY THE MOUND ROAD ENGINE PLANT FROM FEB. 18, 1999 (JULIAN DATE OF 0499) TO MAR. 26, 1999 (JULIAN DATE OF 0859) MAY BE EFFECTED.
A condition may exist where oil seepage past the oil filter adapter plate gasket may result in an incorrect or difficult oil leak diagnosis. The oil seepage could possibly be misdiagnosed as a rear main oil seal leak, an engine pan gasket oil leak, an intake manifold rear seal oil leak, or an oil filter gasket oil leak.