Engine - Geroter Oil Pump Assembly
Bulletin 85-6-20Date July '85
Ref.. No. 85-261-6
SUBJECT: GEROTER OIL PUMP ASSEMBLY
MODELS AFFECTED: 1985 SOMSERSET REGALS WITH 3.0L (VIN CODE L) V6 ENGINES
FIGURE 1 - GEROTER OIL PUMP ASSEMBLY:
FIGURE 2 - PULLEY AND BALANCER ASSEMBLY:
A revised geroter oil pump assembly went into production recently on the above engines. It incorporates a new internal pump gear, crankshaft sprocket and crankshaft pulley and dampener assembly. Figures 1 and 2 identify the differences.
The splines have been removed from the crankshaft sprocket and replaced by two "flats" one on each side of the gear (Items 5A and 5B). The aluminum seal, item #6 has been removed. As a result the length of the hub from front to rear on the crank pulley and dampener has been changed to .180 of an inch.
Installation of the wrong pulley and balancer assembly may cause improper drive belt alignment and premature belt failure.