1991-2002 Saturn S-Series
2000-2004 Saturn L-Series
2002-2004 Saturn Vue
2003-2004 Saturn ION
with Rear Drum Brakes
Technician
This bulletin provides information on proper inspection of rear drum brake wheel cylinders.
It is not recommended that dust boots be
removed during inspection processes as dirt and debris could contaminate the wheel
cylinder bore causing premature wear of the wheel cylinder. In addition, most bores
should look damp and some lubricant may drip out from under the boot as a result of
lubricant being present.Important
All Saturn rear drum brake wheel cylinders are assembled with a lubricant to aid in assembly, provide an anti-corrosion coating to the cylinder bore, and lubricate internal rubber components. As a result of this lubrication process, it is not uncommon for some amount of lubricant to accumulate at the ends of the cylinder under the dust boot.
Over time, the lubricant may work its way to the outside of the boot and cause an area of the boot to look damp. Evidence of a damp area on the boot does not indicate a leak in the cylinder. However, if there is excessive wetness (i.e. drips) coming from the boot area of the wheel cylinder, it could indicate a brake hydraulic fluid leak requiring wheel cylinder replacement. (Refer to the "Wheel Cylinder Replacement" procedures in the appropriate Saturn Service Manual.)
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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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