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Home >> Chevrolet >> 1991 >> S10/T10 Blazer 4WD V6-262 4.3L >> 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

Evaporator Tube Replacement:






REMOVE OR DISCONNECT


1. Discharge and recover refrigerant from the system.

2. Screw (12).

3. Condenser line (5) from evaporator inlet (10).

4. O-ring (11).

5. Orifice tube from inside of evaporator inlet (10).


INSTALL OR CONNECT



- Coat O-rings with 525 viscosity refrigerant oil.

1. Install new orifice tube short screen side down.

2. New Oring (11).

3. Evaporator inlet tube (10) to condenser line (5).


Tighten

- Evaporator connection to 17 Nm (13 ft. lb.).



NOTICE: Refer to "Fasteners" under "Vehicle Damage Warnings."


4. Screw (12).

5. Refrigerant to the system.

- Check the system for leaks.
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