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(1) Select a quiet area for testing. Duplicate the com- plaint conditions as much as possible. Turn the A/C (2) Loosen all of the compressor mounting hard- ware and retighten. Check the compressor clutch CONDITIONING/CONTROLS - FRONT/ CLUTCH-A/C COMPRESSOR - INSTALLATION). (3) To duplicate a high-ambient temperature condi- tions (high head pressure), restrict the air flow (4) Check the refrigerant system plumbing for incorrect routing, rubbing or interference, which can (5) If the noise is from opening and closing of the high pressure relief valve, recover, evacuate and recharge the and (Refer to 24 - HEATING & AIR CONDITIONING/PLUMBING - STANDARD PROCE- (6) If the high pressure relief valve still does not seat properly, replace the A/C compressor (Refer to 24 REMOVAL WARNING: Refer to the applicable warnings and cau- (1) Recover the refrigerant from the refrigerant system (Refer to 24 - HEATING & AIR CONDITION- - STANDARD PROCEDURE - REFRIGERANT SYSTEM RECOVERY). (2) Disconnect and isolate the negative battery cable. ING/ENGINE/RADIATOR FAN - REMOVAL). (4) Remove the nuts that secures the suction and discharge lines to the A/C compressor. (5) Disconnect the suction and discharge lines from the A/C compressor and remove and discard the (6) Install plugs in, or tape over the opened refrig- erant line fittings and compressor ports. (7) Remove the accessory drive belt (Refer to 7 - COOLING/ACCESSORY DRIVE/DRIVE BELTS - REMOVAL). (8) Disconnect the engine wire harness from the field coil connector located on the top of the A/C com- (9) Disengage the engine wire harness from the wiring bracket located on the top of the A/C compres- (10) Remove the four bolts that secure the A/C compressor to the mounting bracket and support the (11) Raise and support the vehicle. the underside compressor splash shield push pins and the splash shield. (13) Remove the A/C compressor from the compres- sor mounting bracket. (14) If required, remove the four bolts that secure the compressor mounting bracket to the engine and Fig. 5 A/C Compressor 1 - COMPRESSOR MOUNTING BRACKET CS PLUMBING 24 - 65 A/C COMPRESSOR (Continued) |