Suburban 3/4 Ton 4WD V8-305 5.0L (1986)
Oxygen Sensor: Technical Service Bulletins
Oxygen Sensors - Silica Contamination
Model Year: 1981
Bulletin No: 81-I-37
File In Group: 60
Number: 11
Date: Feb. 81
Subject:
Silica Contamination of Oxygen Sensors and Gelation of Oil.
Models Affected:
All
Oxygen sensor performance can deteriorate if certain RTV silicone gasket materials are used. Other RTV's when used with certain oils, may cause
gelation of the oil. The degree of performance severity depends on the type of RTV and application of the engine involved.
Therefore, when repairing engines where this item is involved, it is important to use either cork composition gaskets or RTV silicone gasket material
approved for such use. GMS (General Motors Sealant) or equivalent material can be used. GMS is available through GMPD with the following part
numbers:
1052366
3 oz.
1052434
10.14 oz.
