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Home >> Buick >> 2005 >> LeSabre V6-3.8L VIN K >> Repair and Diagnosis >> Heating and Air Conditioning >> Expansion Block/Orifice Tube >> Service and Repair
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Expansion Block/Orifice Tube: Service and Repair

EXPANSION (ORIFICE) TUBE REPLACEMENT

TOOLS REQUIRED
J 39400-A Halogen Leak Detector

REMOVAL PROCEDURE
1. Recover the refrigerant.




2. Disconnect the A/C evaporator hose from the retaining clips.




3. Separate the A/C evaporator hose at the expansion tube location.




4. Remove the expansion tube from the line.

INSTALLATION PROCEDURE




1. Install the new expansion tube.

IMPORTANT:
- Lubricate the new expansion tube O-ring with mineral base 525 viscosity refrigerant oil before installing into the evaporator hose.
- Ensure that the short screen and arrow face toward the evaporator.




2. Connect the A/C evaporator tube.

NOTE: Refer to Fastener Notice in Service Precautions.

Tighten
Tighten the O-ring joint connections to 27 N.m (20 lb ft).




3. Install the A/C evaporator hose into the retaining clips.
4. Recharge the A/C system.
5. Leak test the fittings of the component using the J 39400-A.
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