Air Cleaner Housing - Oil Contamination
90chevy31Number: 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