GM Service Manual Online
For 1990-2009 cars only
Makes 🢒 Isuzu 🢒 1998 🢒 Isuzu MD Steel Tilt (F Model) 🢒 Engine 🢒 Engine Electrical 🢒 Air Conditioning Evaporator Core Replacement

Removal Procedure

    Caution: Unless directed otherwise, the ignition and start switch must be in the OFF or LOCK position, and all electrical loads must be OFF before servicing any electrical component. Disconnect the negative battery cable to prevent an electrical spark should a tool or equipment come in contact with an exposed electrical terminal. Failure to follow these precautions may result in personal injury and/or damage to the vehicle or its components.

  1. Disconnect the negative battery cables. Refer to Battery Replacement in Engine Electrical.
  2. Open the hood.
  3. Secure the hood.
  4. Discharge and recover the refrigerant from the system. Refer to Refrigerant Recovery and Recharging .
  5. Remove the right wiper arm linkage from the wiper arm pivot.

    6. Object Number: 229714 Size: SH
  6. Remove the low pressure hose from the A/C evaporator.
  7. Remove the low pressure hose O-ring seal from the A/C evaporator.
  8. Discard the O-ring seal.
  9. Remove the high pressure hose.
  10. Remove the high pressure hose O-ring seal from the A/C evaporator.
  11. Discard the O-ring seal.

    12. Object Number: 229728 Size: SH
  12. Remove the A/C evaporator core cover screws.
  13. Remove the A/C evaporator core cover.

    14. Object Number: 229730 Size: SH
  14. Remove the A/C evaporator spacer.

    15. Object Number: 229734 Size: SH
  15. Remove the A/C evaporator.

Installation Procedure

    Object Number: 229734 Size: SH
  1. Fill the A/C evaporator. Refer to Refrigerant Oil Distribution Specifications .

    2. Object Number: 229730 Size: SH
  2. Install the A/C evaporator spacer.

    3. Object Number: 229728 Size: SH
  3. Install the A/C evaporator core cover.
  4. Install the A/C evaporator core cover screws.
  5. Coat the new O-ring seal with R-134a Swish Plate P/N AIPDN 2-90188-300-0 refrigerant oil.
  6. Install the new O-ring seal.

    7. Object Number: 229714 Size: SH
  7. Install the high pressure hose to the A/C evaporator.
  8. Coat the new O-ring seal with R-134a Swish Plate P/N AIPDN 2-90188-300-0 refrigerant oil.
  9. Install the new O-ring seal.

    10. Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  10. Install the low pressure hose to the A/C evaporator.

    11. Tighten

        • Tighten the high pressure hose fitting at the A/C evaporator to 18 N·m (13 lb in).
        • Tighten the low pressure hose fitting at the A/C evaporator to 32 N·m (24 lb in).
  11. Push carefully on the right wiper arm linkage.
  12. Close the hood.
  13. Secure the hood.
  14. Connect the negative battery cables.
  15. Inspect the system for leaks. Refer to Leak Testing .