DELAYED A/C COOLING AFTER ENGINE START UP

MODELS AFFECTED: 1985-1986 CIMARRONS WITH 2.OL ENGINES 1987-1988 CIMARRONS

Some 1985-1986 Cimarrons with 2.OL engines and 1987-1988 Cimarrons may experience a condition of delayed A/C cooling after engine start up. This condition may be caused by liquid refrigerant collecting in the compressor crankcase during periods of shutdown, which can delay cooling action up to two minutes while the refrigerant is pumped from the crankcase. This condition is normal.

However, if you experience a delay in cooling at start up beyond two minutes; and the A/C compressor clutch and electrical engine coolant fan are operating correctly, follow the procedure outlined below:

1. Operate the A/C system by setting to norm A/C mode and high blower.

2. Be sure the compressor clutch has engaged and that the electrical engine coolant fan is operating.

3. Idle the engine for two minutes with the A/C system operating.

4. If no cooling, run the engine at approximately 3,000 rpm for one minute with the A/C system operating.

5. If no cooling, change the mode control to vent position for one minute at idle.

6. Set A/C system back to norm A/C mode then run the engine at approximately 3,000 rpm for one minute with the A/C system operating.

7. If no cooling, drive the car in a normal manner for five minutes with the A/C operating.

8. If there is still no cooling, discharge the refrigerant system, check orifice tube for debris and correct installation, evacuate, and recharge.

9. Check for proper cooling. If lack of cooling persists or this procedure must be repeated on subsequent engine ,start ups, remove and replace the compressor.

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.