Caprice Wagon RWD V8-305 5.0L (1991)
Positive Crankcase Ventilation Valve: All Technical Service Bulletins
Air Cleaner Housing - Oil Contamination
Number:
91-28-6
Section:
6
Date:
June 1990
Corp. Bulletin No.: 036004
Subject:
OIL IN THE AIR CLEANER
Model and Year:
1991 CAPRICE WITH TBI AND 5.0L (VIN CODE E) ENGINE
TO:
ALL CHEVROLET DEALERS
Condition:
Some owners of 1991 B-cars with the 5.0L V8 TBI engine, built before VIN breakpoint M W142453, may comment about oil in the air
cleaner housing.
Cause:
Oil vapor from the clean air feed to the right hand rocker cover.
Correction:
A new PCV valve has been released for this application. The part number is 25098542 and it is a CV-914C valve. Air filter
replacement may be necessary if excess oil is found saturating the filter.
Part is currently available from GMSPO.
Labor Operation:
J6000
Labor Time:
.2 Hours
