Town & Country Van V6-201 3.3L VIN R SMFI (1990)
Crankshaft: All Technical Service Bulletins
Engine - Oil Leak at Rear
Models
1990 AC, AS & AY Bodies
Subject
Oil Leak At Rear Crankshaft Flange Area
Index
ENGINE
Date
June 18, 1990
No.
09-03-90
P-1786 (C09-02-0)
BODY CODE LEGEND
AC - DYNASTY/NEW YORKER/SALON AS - GRAND CARAVAN/VOYAGER/TOWN & COUNTRY AY - IMPERIAL/NEW YORKER FIFTH
AVENUE
SYMPTOM/CONDITION
Some 1990 3.3L engines may exhibit an oil leak at the rear of the engine in the area of the rear crankshaft seal. This leak may be the result of one or
more of the four untapped holes in the rear crankshaft flange being drilled too deep. A leak in this area may be mis-diagnosed as a rear crankshaft seal or
oil pan leak.
DIAGNOSIS
Remove the torque converter dust cover. Inspect rear of the block for evidence of oil. A circular spray pattern generally indicates a crankshaft seal leak.
A leak that tends to run straight down the block indicates a cam or oil gallery plug leak, seal retainer leak or porous block. In any case, the transaxle will
need to be removed for further inspection.
Figure 1
After removing the transaxle, remove the torque converter drive plate. Carefully inspect the four holes in the crankshaft flange as shown in Figure 1. The
holes should be dry. If any one of the four holes have indications of oil accumulation perform the repair procedure. If the holes are dry, repair the source
of the oil leak as necessary.
