9-7X V8-5.3L (2005)
Expansion Block/Orifice Tube: Service and Repair
Expansion (Orifice) Tube Replacement
Tools Required
*
J 26549-E Orifice Tube Remover
*
J 39400-A Halogen Leak Detector
Removal Procedure
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (See: Service and Repair/Refrigerant Recovery and Recharging).
2. Remove the accumulator. Refer to Air Conditioning Accumulator Replacement (See: Accumulator HVAC/Service and Repair).
3. Remove the coolant reservoir. Refer to Coolant Recovery Reservoir Replacement (See: Engine, Cooling and Exhaust/Cooling System/Coolant
Reservoir/Service and Repair/Coolant Recovery Reservoir Replacement).
4. Remove the evaporator tube nut (3) at the evaporator (1).
5. Remove the evaporator tube (4) from the evaporator (1).
6. Remove the O-ring seal and discard.
7. Remove the nut from the evaporator tube block fitting.
8. Separate the evaporator tubes (4, 6) at the block fitting.
9. Use the J 26549-E in order to remove the expansion tube.
10. Remove the expansion tube from the evaporator tube (6).
Installation Procedure
Important: Install the shorter screen end of the expansion tube into the evaporator tube (6) first.
1. Use the J 26549-E in order to install the expansion tube.
2. Install the new O-ring seal. Refer to O-Ring Replacement (See: Coupler HVAC/A/C Coupler O-ring/Service and Repair/O-Ring Replacement).
3. Assemble the evaporator tubes (4, 6).
Notice: Refer to Fastener Notice (See: Service Precautions/Vehicle Damage Warnings/Fastener Notice).
4. Install the evaporator tube nut.