1991-2002 Saturn Vehicles
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 coolant recovery reservoir. This brown substance may mislead a customer or retail technician to suspect that the engine coolant 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 residue 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 reservoir 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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GM bulletins are intended for use by professional technicians,
NOT a "do-it-yourselfer". They are written to inform these
technicians of conditions that may occur on some vehicles, or to
provide information that could assist in the proper service of a
vehicle. Properly trained technicians have the equipment,
tools, safety instructions, and know-how to do a job properly and
safely. If a condition is described, DO NOT assume that the
bulletin applies to your vehicle, or that your vehicle will have
that condition. See your GM dealer for information on whether
your vehicle may benefit from the information. |
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