Buick Regal: Air Conditioning Compressor Oil Balancing

Draining Procedure

NOTE: Drain and measure as much of the refrigerant oil as possible from the rear head ports of the REMOVED compressor.

1. Remove the compressor crankcase oil drain plug from the removed compressor and drain the refrigerant oil from the crankcase into a clean, graduated container.

2.

Drain the oil from both the suction and discharge ports into the same container. Rotate the compressor shaft to assist in draining the compressor.

3. Measure and record the amount of oil drained from the removed compressor. In addition, measure and record the amount of oil recovered during refrigerant recovery.

This measurement will be used during installation of the replacement compressor.

4. Inspect oil drained from removed compressor.

5. Properly discard the used refrigerant oil.

Balancing Procedure

NOTE: The refrigerant oil in the A/C system must be balanced during compressor replacement.

NOTE: Check the oil volume in the replacement compressor.

The replacement compressor is shipped partially filled with refrigerant oil. The amount of oil has to be balanced according to below:

1. Refer to the amounts of refrigerant oil recorded during the compressor removal and refrigerant recovery.

2. If the sum of the amount of oil drained from the removed compressor and the amount of oil removed during refrigerant recovery is:

• Less than the oil volume in the replacement compressor, no balancing is required. Refill the replacement compressor with the amount removed. It contains the proper amount of oil.
• More than the oil volume in the replacement compressor, additional oil is required. Subtract the oil volume in the replacement compressor from the sum of removed oil (oil drained + oil recovered).

  This calculated difference is the amount of service oil that needs to be added to the replacement compressor. Add the additional oil needed and install the replacement compressor.

AIR CONDITIONING COMPRESSOR REPLACEMENT (LTG)

Preliminary Procedures

1. Refrigerant Recovery and Recharging (R-1234yf),

2. Drive Belt Replacement,

3. Charge Air Cooler Inlet Air Tube Replacement,

4. Air Conditioning Compressor and Condenser Hose Replacement (LGX)Air Conditioning Compressor and Condenser Hose Replacement (LTG)@Air Conditioning Compressor - Disconnect,

1. Air Conditioning Compressor Nut
   CAUTION: Fastener Caution
   Tighten
   22N.m (16 lb ft)
2. Air Conditioning Compressor Bolt[2x]
   Tighten
   22N.m (16 lb ft)
3. Air Conditioning Compressor

Procedure

1. Disconnect the electrical connector.
2. When replacing the air conditioning compressor, balance the compressor oil.
3. Using the GE 39400-A Electronic Halogen Leak Detector leak test A/C compressor fittings.

Special Tools

GE 39400-A Electronic Halogen Leak Detector

Equivalent regional tools:Special Tools

AIR CONDITIONING COMPRESSOR REPLACEMENT (LGX)

Removal Procedure

1. Recover the refrigerant.

2.

Drive Belt(1)@Air Conditioning Compressor - Remove.

3. Front End Sheet Metal Diagonal Brace Reinforcement - Remove.

4.

Air Conditioning Compressor Hose(2)@Air Conditioning Compressor - Remove.

5.

Disconnect the electrical connectors.(1)[2x].

6. Engine Wiring Harness Bracket Bolt(3)@Air Conditioning Compressor - Remove.

7. Air Conditioning Compressor Bolt(2)@Air Conditioning Compressor - Remove.

8.

Air Conditioning Compressor Nut(2)@Air Conditioning Compressor(3) - Remove.

9. Air Conditioning Compressor Stud(1)@Air Conditioning Compressor(3) - Remove.

10. Air Conditioning Compressor Bolt(4)@Air Conditioning Compressor(3) - Remove.

11. Remove the air conditioning compressor (3) from the vehicle.

Installation Procedure

1. Prior to installing the air conditioning compressor perform the air conditioning compressor oil balancing procedure.

2.

Install the air conditioning compressor (3) to the vehicle.

CAUTION: Refer to Fastener Caution.

3. Air Conditioning Compressor Stud(1)@Air Conditioning Compressor(3) - Install and tighten 9 N.m (80 lb in).

4. Air Conditioning Compressor Bolt(4)@Air Conditioning Compressor(3) - Install and tighten 22 N.m (16 lb ft).

5. Air Conditioning Compressor Nut(2)@Air Conditioning Compressor(3) - Install and tighten 22 N.m (16 lb ft).

6.

Engine Wiring Harness Bracket Bolt(3)@Air Conditioning Compressor - Install and tighten 9 N.m (80 lb in).

7. Air Conditioning Compressor Bolt(2)@Air Conditioning Compressor - Install and tighten 22 N.m (16 lb ft).

8. Connect the electrical connectors.(1)[2x].

9.

Air Conditioning Compressor Hose(2)@Air Conditioning Compressor - Install.

10. Front End Sheet Metal Diagonal Brace Reinforcement - Install.

11.

Drive Belt(1)@Air Conditioning Compressor - Install.

12. Recharge the refrigerant.

13. Inspect for refrigerant leaks.

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