Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHEVROLET2011COLORADO 2WD L4-2.9LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGEXPANSION BLOCK/ORIFICE TUBESERVICE AND REPAIR
2011 Chevrolet Colorado 2WD L4-2.9L
Expansion Block/Orifice Tube: Service and Repair
2011 Chevrolet Colorado 2WD L4-2.9LSECTION Service and Repair
Air Conditioning Evaporator Thermal Expansion Valve Replacement
Special Tools
J 39400-A Halogen Leak Detector
Removal Procedure
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
2. Remove the nut from the TXV mounting stud.
3. Remove the evaporator tube and the compressor suction hose from the TXV.
4. Remove and discard the seal washers.
5. Remove the TXV bolts.
6. Remove the TXV.
7. Remove and discard the seal washers.
Installation Procedure
1. Install new seal washers to the evaporator core fittings. Refer to Air Conditioning System Seal Replacement (Air Conditioning System Seal Replacement).
2. Install the TXV.
Caution: Refer to Fastener Caution (Fastener Caution).
3. Install the TXV bolts. Tighten the bolts to 7 Nm (62 lb in).
4. Install new sealing washers on the evaporator tube and the compressor suction hose fittings. Refer to Air Conditioning System Seal Replacement (Air Conditioning System Seal Replacement).
5. Install the evaporator tube and the compressor suction hose to the TXV.
6. Install the TXV nut. Tighten the nut to 20 Nm (15 lb ft).
7. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging (Refrigerant Recovery and Recharging).
8. Leak test the fittings using the J 39400-A .
RENDER: 1.0x
NO RELATED
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.