Rear Heating and A/C Unit A/C Refrigerant System Components, Servicing

Rear Heating And A/C Unit A/C Refrigerant System Components, Servicing

Special tools, workshop equipment and auxiliary items required







- VAG 1331 Torque wrench (or 5 - 50 Nm equivalent)







- Refrigerant recycling/recovery unit Kent-Moore ACR4 (or UL approved equivalent - VAS 6007A illustrated for reference only).

NOTE:







- Before carrying out any work on the A/C refrigerant system, refer to all CAUTIONS and WARNINGS in A/C refrigerant system safety measures.
- Evacuate refrigerant circuit using refrigerant recycling/recovery unit Kent-Moore ACR4 (or UL approved equivalent).
- O-rings used on R-134a systems may be red, green, violet or black.
- Always plug open refrigerant line connections to prevent dirt and moisture contamination.

Pressures and temperatures, checking

Testing with pressure gauges

Discharging

Evacuating and recharging

1. Refrigerant line
- High pressure side
- Behind left rear wheel housing cover

2. O-ring
- Always replace
- 9.5 mm; 2.5 mm

3. O-ring
- Always replace
- 13.7 mm; 2.5 mm

4. Socket head bolt M 10x84
- -12Nm±1
- Qty..:2

5. Refrigerant line
- Low pressure side
- Behind left rear wheel housing cover

6. Socket head bolt M6x35
- 3.5 Nm ±0.5
7. Socket head bolt M6x35
- 3.5 Nm ±0.5

8. Socket head bolt M6x70
- 3.5 Nm ±0.5

9. Socket head bolt M6x70
- 3.5 Nm ±0.5

10. O-ring
- Always replace
- 13.7 mm; 2.5 mm

11. O-ring
- Always replace
- 9.5 mm; 2.5 mm

12. Refrigerant line
- Low pressure side
- Under vehicle

13. Refrigerant line
- High pressure side
- Under vehicle 14-BoltM6x16
- 8 Nm ±1.2

15. Bracket 16-BoltM6x16
- 8 Nm ±1.2

17. Spacer bracket
18. Socket head bolt M6x35
- -3.5 Nm ±0.5
19. Socket head bolt M6x35
- 3.5 Nm ±0.5
20. Damper

21. O-ring
- Always replace
- 13.7 mm; 2.5 mm

22. Socket head bolt M8x28
- 12 Nm±1

23. Refrigerant line
- High pressure side - Behind left front wheel housing cover 24-O-ring
- Always replace
- 13.7 mm; 2.5 mm

25. Socket head bolt M8x28
- 12Nm±1

26. Refrigerant line
- Low pressure side
- Behind left front wheel housing cover

27. Coolant pipe
- To rear heater core
- Behind left rear wheel housing cover

28. Coolant pipe
- To rear heater core
- Behind left front wheel housing cover

29. Coolant hose
- To rear heater core
- Behind left rear wheel housing cover

30. Coolant hose
- To rear heater core
- Behind left front wheel housing cover