Expansion Block/Orifice Tube: Description and Operation

A/C Evaporator Core Orifice:

NOTE: The A/C evaporator core orifice should be replaced whenever an A/C compressor is replaced.

The A/C evaporator core orifice has the following characteristics:
^ color-coded red
^ has an orifice diameter of 1.6 mm (0.062 inch)
^ is located in the A/C evaporator core inlet tube
^ has filter screens located on the inlet and outlet ends of the tube body
^ The inlet filter screen acts as a strainer for the liquid refrigerant flowing through the A/C evaporator core orifice.
^ O-rings on the A/C evaporator core orifice prevent
^ Adjustment or repair cannot be made to the A/C evaporator core orifice assembly. It must be replaced as a unit.