GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Buick 🢒 2000 🢒 Century 🢒 HVAC 🢒 Heating, Ventilation and Air Conditioning 🢒 O-Ring Replacement

Removal Procedure
  1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging .
  2. Remove the left front diagonal brace. Refer to Front Fender Upper Diagonal Brace Replacement in Body Front End.
  3. Remove the cross vehicle brace, if equipped. Refer to Cross Vehicle Brace Replacement in Body Front End.

    4. Object Number: 297225 Size: SH
  4. For compression-style fittings; use a back-up wrench on the A/C refrigerant component (smaller size) fitting (2), then loosen the A/C refrigerant hose (larger size) fitting (1).
  5. For banjo-style fittings; remove the bolt/nut retaining the A/C refrigerant hose to the A/C refrigerant component.

    6. Important: Cap or tape the open A/C refrigerant hose and the A/C refrigerant component immediately.

  6. Disconnect the A/C refrigerant hose from the A/C refrigerant component, discard the O-ring seal and cap or tape the A/C refrigerant hose and the A/C refrigerant component to prevent contamination.

Installation Procedure

    Object Number: 297232 Size: SH
  1. Remove the cap or tape from the A/C refrigerant hose and the A/C refrigerant component.
  2. Using a lint-free clean, dry cloth, carefully clean the sealing surfaces of the A/C refrigerant hose and the A/C refrigerant component.
  3. For compression-style fittings; carefully slide the new O-ring seal (1) onto the A/C refrigerant hose until seated.

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

  4. Lightly lubricate the new O-ring seal (1) with mineral base 525 viscosity refrigerant oil.

    5. Object Number: 297228 Size: SH
  5. For banjo-style fittings; carefully slide the new O-ring seal (1) onto the A/C refrigerant hose until seated.

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

  6. Lightly lubricate the new O-ring seal (1) with mineral base 525 viscosity refrigerant oil.

    7. Leave a light coating of the refrigerant oil to remain on the A/C refrigerant hose in the area indicated (2) ONLY.


    Object Number: 297225 Size: SH
  7. Install the A/C refrigerant hose to the A/C refrigerant component.
  8. For compression-style fittings; use a back-up wrench on the A/C refrigerant component (smaller size) fitting (2), then tighten the A/C refrigerant hose (larger size) fitting (1) to specification.
  9. For banjo-style fittings; install the bolt/nut retaining the A/C refrigerant hose to the A/C refrigerant component, then tighten to specification.
  10. Install the cross vehicle brace, if equipped. Refer to Cross Vehicle Brace Replacement in Body Front End.
  11. Install the left front diagonal brace. Refer to Front Fender Upper Diagonal Brace Replacement in Body Front End.
  12. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging .
  13. Leak test the filling(s) of the repaired or reinstalled component using J 39400 .