Corsica L4-121 2.0L (1988)
Rocker Arm Assembly: All Technical Service Bulletins
Engine - Valve Train Noise/Rocker Arm Damage
Number:
88-134-6E
Section:
6E
Date:
Feb., 1988
Subject:
VALVE TRAIN NOISE/ROCKER ARM DAMAGE
Model and Year:
1988 CAVALIER, CORSICA AND BERETTA
WITH 4 CYLINDER (VIN CODE 1) ENGINE
FIGURE 1
TO:
ALL CHEVROLET DEALERS
Excessive valve train noise on the above vehicles with the L4 engine may be created by the incorrect installation of two valve spring seats instead of one.
(Refer to Figure 1 item 5).
Vehicles exhibiting excessive valve train noise should have all valve spring seats inspected for the possibility of two seats stacked on top of each other.
Removing oil from around the base of the valve spring will make this inspection easier. Any valve spring that had two seats underneath it should have the
rocker arm replaced. The two seat misbuild puts excessive loads on the rocker arm and can lead to premature failures.
