RETROFIT OF VENTED ROTORS EARLY SOLID FRT. BRAKE ROTORS

Subject: RETROFIT OF 1988-1990 LEMANS WITH SOLID FRONT BRAKE ROTORS TO 1990 VENTED ROTORS (INSTRUCTIONS) Models Affected: 1988-90 LEMANS MODELS

It is now possible to install 1990 vented front rotor brake systems on all past model LeMans vehicles with solid front brake rotors. Vented rotors will reduce brake temperature and thus increase front brake pad life.

Parts Required:

Quantity Part Number Description 2 90121445 Vented Rotor 2 3494359 Outer Caliper Half 4 3487214 Bolts, Caliper Half 2 3487487 Pin Kit, Pad Retention 1 18017995 Pad Kit, 1.6L

Instructions:

1. Remove and replace front rotors per instructions in the service manual, section 5. Do not remove calipers and do not install front brake pads.

2. Remove the caliper outer halves retained by two bolts. Item 5. Do not remove the caliper.

3. Install the new caliper halves #3494359 using new bolts #3487214. Torque to 80-110 N.m (60-80 lbs. ft.)

4. Install new front pads #18017995 with new retention pins #3487487. Be sure pads are in the proper location, the pads with wear indicators should be against the piston.

5. Complete installation and road test vehicle.

Parts are currently available from GMSPO.

Labor Operation: T3257

Labor Time: 1.0 Hour

General Motors bulletins are intended for use by professional technicians, not a "do-it-yourselfer". They are written to inform those 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 a General Motors dealer servicing your brand of General Motors vehicle for information on whether your vehicle may benefit from the information.