Oil Filters (Small 75 mm) - Leakage Prevention
90chevy13Number: 90-216-6
Section: 6
Date: April 1990
Corp. Bulletin No.: 906106
Subject: PROPER INSTALLATION OF 75 MM OIL FILTER
Model and Year: 1981-90 CHEVROLET MODELS
THIS BULLETIN CANCELS AND SUPERSEDES DEALER SERVICE BULLETIN NO. 90-187-6, DATED MARCH 1990. THE 1990 MODEL YEAR HAS BEEN ADDED. ALL COPIES OF 90-187-6 SHOULD BE DISCARDED.
To prevent leakage of small 75 mm oil filters such as PF-40, PF-45, PF-47, PF-51, etc., it is very important that the installation instructions listed below are closely followed.
Remove old filter by turning counter clockwise. Clean gasket sealing area on Engine Oil Filter Mounting Surface. (If engine has an adapter base, make sure threaded nipple or bolt is properly torqued.)
Lightly oil gasket with clean oil and install filter. After the oil filter gasket contacts the oil filter adapter base, tighten 3/4 to 1 full turn. When necessary, use a cap-type wrench, AC Delco OF17W or equivalent, or strap type wrench with swivel handle to insure proper installation.
With engine oil at proper level, run engine three minutes and thoroughly check filter area for leaks.
IMPORTANT: Be certain to follow replacement oil filter usage applications.