SW1 L4-1.9L SOHC VIN 8 (1996)
Coolant: Technical Service Bulletins
Cooling System - Coolant Discoloration Explanation
Bulletin No.: 97-T-04A
Date: January 6, 2003
TECHNICAL
Subject:
Information on Engine Coolant Recovery Reservoir Discoloration Due to Engine Cooling System Sealer. Due to changes to Models Affected and minor
changes to terminology, this bulletin has been revised and supercedes bulletin 97-T-04A, which should be discarded.
Models:
1991-2002 Saturn Vehicles
Purpose
The purpose of this bulletin is to provide information concerning the appearance of engine cooling system sealer when added to the engine cooling
system. Some Saturn customers may comment on a brown substance that is visible in the engine coolent recovery reservoir. This brown substance may
mislead a customer or retail technician to suspect that the engine coolent is contaminated with engine oil.
Engine cooling system sealer in pellet form and brown in color may not dissolve completely, leaving a residue on the inside surfaces of both engine
coolant recovery reservoir and the coolant recovery reservoir cap.
Engine cooling system sealer residue can be easily distinguished from engine oil contamination by inspecting the engine coolant recovery reservoir and
the coolant recovery reservoir cap. Engine cooling system sealer reservoir will be gritty to the touch with visible fibers.
Engine oil contamination will cause the engine coolant to be milky brown in color and will coat the engine coolant recovery resolver and coolant
recovery reservoir cap with a slick oily film. Engine oil contamination will also reduce the cooling systems ability to properly maintain operating
temperatures.
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