Aerostar 2WD V6-245 4.0L (1990)
PCV Valve Hose: Customer Interest
Rear Crankshaft Oil Seal/Dipstick Tube - Leaks Oil
Article No.
94-3-6
02/09/94
LEAKS - OIL - 3.0L - AT THE REAR CRANKSHAFT OIL SEAL AND/OR AT ENGINE OIL DIPSTICK TUBE
LIGHT TRUCK:
1987-91 AEROSTAR
This TSB article is being republished in its entirety to include 1991 model-year vehicles.
ISSUE:
Oil leaks at the rear crankshaft oil seal or the engine oil dipstick tube may be caused by excessive pressure in the engine crankcase. This occurs because
ice forms in the PCV closure hose in ambient temperatures of -4~F (-20~C) and below.
ACTION:
Install a filter and tee assembly in the crankcase ventilation closure hose. Refer to the following procedure for service details.
