Somerset V6-181 3.0L (1986)
Engine Mount: All Technical Service Bulletins
Engine - Oil Pump To Front Cover Causing Whine Noise
Bulletin 89-6-4
Date Nov. '88
Ref. No. 88-252-6
Corp. Ref. No. 876117
WHINE NOISE IN PASSENGER COMPARTMENT
MODELS AFFECTED:
1985-87 SOMERSETS WITH 3.0L V-6 ENGINES (VIN CODE L) 1986-89 SKYLARKS WITH 3.0L V-6 ENGINES
(VIN CODE L)
A minor whine type noise may be heard in the passenger compartment of 1985-1988 subject models equipped with a 3.0L V-6 engine. This whine,
usually most noticeable at approximately 3000 revolutions per minute (rpm), is a result of engine oil pump to front cover alignment which can excite a
resonance in the rear engine mount to engine bracket. This resonance can be transmitted to the passenger compartment as a whine.
Vehicles exhibiting this condition can be repaired by installing a new right rear engine mount to engine bracket kit as described in the following service
procedure.
Part is currently available from GMSPO under the following part number:
12340523 Bracket Kit - Right Rear Engine Mount to Engine
Bracket Kit contains:
-
Right rear engine mount to engine bracket
-
Stud
-
Nut
NOTICE:
As in any service procedure, diagnostics are the key to an effective repair. Before performing the following procedure refer to Dealer
Technical Bulletins 87-6-26 and 86-6-3.
SERVICE PROCEDURE
Tools required:
J 28467 Engine Support Fixture
FIGURE 1
REMOVAL OF ORIGINAL RIGHT REAR ENGINE MOUNT TO ENGINE BRACKET (Figure 1):
1.
Disconnect negative battery cable.
