GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Chevrolet 🢒 2000 🢒 Corvette 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 Accumulator Tube Replacement

Removal Procedure
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the battery. Refer to Battery Replacement in Engine Electrical.

    3. Object Number: 284760 Size: SH
  3. Remove the battery heat shield. Refer to Battery Heat Shield Replacement in Body Front End.

    4. Object Number: 65170 Size: SH
  4. Remove the engine intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.

    5. Object Number: 621749 Size: SH
  5. Remove the nut retaining the heater pipe bracket to the dash panel.
  6. Reposition the heater pipe bracket to access the refrigerant lines.

    7. Object Number: 621746 Size: SH
  7. Remove the front evaporator tube to rear evaporator tube retaining bolt.

    8. Important: Cap or tape the open evaporator tubes immediately to prevent contamination.

  8. Disconnect the evaporator tubes, and discard the O-ring.

    9. Object Number: 95632 Size: SH
  9. Remove the compressor hose to accumulator retaining bolt.

    10. Important: Cap or tape the open compressor hose and the accumulator immediately to prevent contamination.

  10. Disconnect the compressor hose from the accumulator to access the accumulator hose, and discard the O-ring.
  11. Reposition the compressor hose end.

    12. Object Number: 297225 Size: SH
  12. Using a back-up wrench on the accumulator fitting (2), loosen the accumulator hose fitting (1) from the accumulator.

    13. Important: Cap or tape the open accumulator hose and the accumulator immediately to prevent contamination.


    Object Number: 297300 Size: SH
  13. Disconnect the accumulator hose from the accumulator, discard the O-ring.

    14. Object Number: 621748 Size: SH
  14. Remove the accumulator hose to evaporator retaining bolt.

    15. Important: Cap or tape the open accumulator hose, rear evaporator tube, and the evaporator immediately to prevent contamination.

  15. Disconnect the accumulator hose from the evaporator, discard the O-ring.

    16. Important: Prior to removal, take note of the accumulator hose orientation to the accumulator and the rear evaporator tube.


    Object Number: 621747 Size: SH
  16. Carefully remove the accumulator hose, separating it from the rear evaporator tube.

Installation Procedure
  1. Remove the cap or tape from the accumulator hose, rear evaporator tube and the evaporator.
  2. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the accumulator hose, rear evaporator tube and the evaporator.

    3. Object Number: 297232 Size: SH
  3. Lightly coat the new O-ring (1) with mineral base 525  viscosity refrigerant oil.

    4. Important: DO NOT allow any of the mineral base 525  viscosity refrigerant oil on the O-ring to enter the refrigerant system.

  4. Carefully slide the new O-rings (1) onto the accumulator hose and the rear evaporator tube until seated.

    5. Object Number: 621747 Size: SH
  5. Position the accumulator hose with the rear evaporator tube and install the assembly to the evaporator.

    6. Object Number: 621748 Size: SH
  6. Install the accumulator hose to evaporator retaining bolt.

    7. Tighten
    Tighten the accumulator hose to evaporator retaining bolt to 16 N·m (12  lb  ft).

  7. Remove the cap or tape from the accumulator.
  8. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the accumulator hose and the accumulator.

    9. Object Number: 297232 Size: SH
  9. Lightly coat the new O-ring seal (1) with mineral base 525  viscosity refrigerant oil.

    10. Important: DO NOT allow any of the mineral base 525  viscosity refrigerant oil on the O-ring seal (1) onto the accumulator hose until seated.


    Object Number: 297300 Size: SH
  10. Install the accumulator hose to the accumulator.

    11. Object Number: 297225 Size: SH
  11. Using a back-up wrench on the accumulator fitting (2), secure the accumulator hose fitting (1) to the accumulator.

    12. Tighten
    Tighten the accumulator hose fitting to the accumulator to 41 N·m  (30 lb ft).

  12. Remove the cap or tape from the compressor hose.
  13. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the compressor hose and the accumulator.

    14. Object Number: 297228 Size: SH
  14. Lightly coat the O-ring seal (1) with mineral base 525  viscosity refrigerant oil.

    15. Important: DO NOT allow any of the mineral base 525  viscosity refrigerant oil on the O-ring seal to enter the refrigerant system.

  15. Carefully slide the new O-ring seal (1) onto the compressor hose until seated.

    16. Leave a light coating on the refrigerant oil to remain on the compressor hose in the area indicated (2) only.


    Object Number: 95632 Size: SH
  16. Install the compressor hose to the accumulator with retaining bolt.

    17. Tighten
    Tighten the compressor hose to accumulator retaining bolt to 20 N·m (15 lb ft).

  17. Remove the cap or tape from the front evaporator tube and the rear evaporator tube.
  18. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the evaporator tubes.

    19. Object Number: 297232 Size: SH
  19. Lightly coat the O-ring seal (1) with mineral base 525 viscosity refrigerant oil.

    20. Important: DO NOT allow any of the mineral base 525  viscosity refrigerant oil on the O-ring seal to enter the refrigerant system.


    Object Number: 297228 Size: SH
  20. Carefully slide the new O-ring seal (1) onto the front evaporator tube until seated.

    21. Leave a light coating of the refrigerant oil to remain on the front evaporator tube in the area indicated (2) ONLY.


    Object Number: 621746 Size: SH
  21. Install the front evaporator tube to the rear evaporator tube with retaining bolt.

    22. Tighten
    Tighten the front evaporator tube to the rear evaporator tube retaining bolt to 25 N·m (18 lb ft).


    Object Number: 621749 Size: SH
  22. Install the heater pipe bracket to the dash panel stud.
  23. Install the heater pipe bracket retaining nut.

    24. Tighten
    Tighten the heater pipe bracket retaining nut to 10 N·m (89 lb in).


    Object Number: 65170 Size: SH
  24. Install the engine intake manifold. Refer to Intake Manifold Replacement in Engine Mechanical.

    25. Object Number: 284760 Size: SH
  25. Install the battery heat shield. Refer to Battery Heat Shield Replacement in Body Front End.

    26. Object Number: 74060 Size: SH
  26. Install the battery. Refer to Battery Replacement in Engine Electrical.
  27. Program the transmitter. Refer to Transmitter Programming/Synchronization in Keyless Entry.
  28. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging .
  29. Check the compressor hose to accumulator, accumulator hose and evaporator tube joints for leaks. Refer to Leak Testing .