1. Remove the refrigerant from the air conditioning system (see "Removal refrigerant from the air conditioning system").
2. Place the vehicle on an inspection pit.
3. Disconnect the wire from the negative terminal of the battery.
4. Remove the lower trim of the front bumper (see "Removal and installation the front bumper").
5. Remove the right engine splash guard (see "Removal and installation engine mudguards").
6. Remove the accessory drive belt (see "Replacement of auxiliary drive belt").
7. Check the condition of the drive belt.
Note: Replace the belt if upon inspection you find:
- signs of wear on the toothed surface, cracks, cuts, folds or separation of the fabric from the rubber;
- cracks, folds, depressions or bulges on the outer surface of the belt;
- fraying or delamination on the end surfaces of the belt;
- traces of oil on the surface of the belt.
Warning: A belt with traces of motor oil on any of its surfaces must be replaced, as oil quickly destroys rubber. The reason for oil getting on the belt (usually due to a leak in the engine shaft seals) must be eliminated immediately.
8. Press the clamps...
9. ...and disconnect the wiring harness connector from the compressor electromagnetic clutch.
10. Unscrew the nut securing the hose block pressure plate to the compressor.
11. Disconnect the low and high pressure pipeline flanges from the compressor.
Warning: Immediately after disconnecting, plug the compressor openings and air conditioning lines to prevent moisture and dirt from entering the air conditioning system.
12. Turn the top two...
13. ...and two lower bolts securing the compressor to the bracket
14. Remove the bolts from the mounting holes and remove the air conditioning compressor.
15. Install the compressor and all removed parts in the reverse order of removal.
Warnings: Open the process plugs of the flanges of the new compressor only immediately before connecting the pipelines.
The flange of the pipeline block is sealed with two rubber-metal sealing rings. When the rings are pressed, the metal rim is deformed, so such rings are not suitable for reuse.
When installing new manifold flange O-rings, be sure to lubricate them with A/C compressor oil.
16. Make sure that when installing the belt, the V-grooves align with the pulley grooves.
17. Tighten the nut securing the hose block pressure plate to the compressor to a torque of 33 N·m.
18. Have the air conditioning system refilled with refrigerant at a specialist car air conditioning service centre.
Helpful Hint: When purchasing a new compressor, ask the seller about the amount and type of oil that is in the new compressor. This information may be useful to mechanics who will subsequently fill the system with refrigerant.
Information taken from the official website: CHEVYMAN.RU