Expansion Block/Orifice Tube: Description and Operation

Evaporator Core Orifice

















Removal

1. Recover the refrigerant.

2. NOTE: The evaporator core orifice access fitting is located in the condenser-to-evaporator line below the powertrain control module.

Disconnect the evaporator core orifice access fitting.

- Discard the O-ring seal.

3. Inspect the evaporator core orifice for damage before attempting to remove it from the line.

4. If the evaporator core orifice is intact, engage the Fixed Orifice Remover/Installer. Hold the T-handle stationary while rotating the tool body to remove the evaporator core orifice.





5. If the evaporator core orifice is broken, screw the end of the Broken Orifice Remover into the broken orifice. Hold the T-handle stationary while rotating the tool body to remove the evaporator core orifice.





Installation

1. Lubricate the evaporator core orifice O-rings with clean PAG oil and install the evaporator core orifice using the Fixed Orifice Remover/Installer.





2. Install a new O-ring seal and connect the evaporator core orifice access fitting.
- To install, tighten to 18 Nm (159 lb-in).

3. Lubricate the refrigerant system with the correct amount of clean PAG oil.

4. Evacuate, leak test and charge the refrigerant system.