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 MANUALSCHEVROLET2008COLORADO 2WD L5-3.7LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGEXPANSION VALVESERVICE AND REPAIR
2008 Chevrolet Colorado 2WD L5-3.7L
Expansion Valve: Service and Repair
2008 Chevrolet Colorado 2WD L5-3.7LSECTION Service and Repair
Thermal Expansion Valve Replacement
Tools Required
J 39400-A Halogen Leak Detector
Removal Procedure
1. Recover the refrigerant. Refer to Refrigerant Recovery and Recharging (Non HP2) (Refrigerant Recovery and Recharging (Non HP2)) .
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 Sealing Washer Replacement (Sealing Washer Replacement) .
2. Install the TXV.
Notice: Refer to Fastener Notice.
3. Install the TXV bolts.
Tighten the bolts to 7 N.m (62 lb in).
4. Install new sealing washers on the evaporator tube and the compressor suction hose fittings. Refer to Sealing Washer Replacement (Sealing Washer Replacement) .
5. Install the evaporator tube and the compressor suction hose to the TXV.
6. Install the TXV nut.
Tighten the nut to 20 N.m (15 lb ft).
7. Evacuate and charge the refrigerant system. Refer to Refrigerant Recovery and Recharging (Non HP2) (Refrigerant Recovery and Recharging (Non HP2)) .
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.