Dakota 4WD V8-318 5.2L (1991)
Compressor HVAC: All Technical Service Bulletins
A/C Compressor - Growling Noise
NO.: 24-27-93
GROUP: Heater & A/C
DATE: Nov. 19, 1993
SUBJECT:
A/C Compressor Noise
MODELS:
1991 - 1993
(AD)
Ram Pickup/Ramcharger
1991 - 1994
(AN)
Dakota
1994
(BR)
Ram pickup
1991 - 1992
(MJ)
Comanche
1991 - 1994
(XJ)
Cherokee
1991 - 1994
(YJ)
Wrangler
SYMPTOM/CONDITION:
A growling noise may be heard with the A/C compressor running.
DIAGNOSIS:
Run the vehicle in neutral with the A/C system operating in the normal A/C mode with the compressor engaged and the blower fan operating at low
speed. Raise the engine RPM slowly until 2500 RPM is reached while listening for the noise. If the noise is heard, disengage the compressor by turning
the A/C system to the heat mode or by depressing the A/C button. If the noise goes away when the compressor disengages, perform the repair procedure.
PARTS REQUIRED:
NOTE:
THIS BULLETIN APPLIES TO VEHICLES THAT USE EITHER R12 OR R134A. REFER TO THE SERVICE MANUAL FOR THE MODEL
BEING REPAIRED AND USE THE APPROPRIATE SERVICE PROCEDURES AND RECOVERY EQUIPMENT FOR THE SYSTEM THE
VEHICLE IS EQUIPPED WITH.
REPAIR PROCEDURE:
This bulletin involves installing a revised A/C compressor valve plate assembly.
NOTE:
IN ORDER TO MINIMIZE THE ABSORPTION OF MOISTURE INTO THE A/C SYSTEM, DO NOT LEAVE THE SYSTEM OPEN TO THE
ATMOSPHERE ANY LONGER THAN IT TAKES TO PERFORM THIS PROCEDURE.
1.
Using the procedures outlined in the appropriate service manual, discharge and recover the refrigerant using approved refrigerant recovery
equipment.
