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 MANUALSCHEVROLET2006OPTRA (CANADA) L4-2.0LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGEXPANSION VALVESERVICE AND REPAIR
2006 Chevrolet Optra (CANADA) L4-2.0L
Expansion Valve: Service and Repair
2006 Chevrolet Optra (CANADA) L4-2.0LSECTION Service and Repair
Thermal Expansion Valve Replacement
Removal Procedure
Caution: Refer to Battery Disconnect Caution Battery Disconnect Caution in Cautions and Notices.
1. Disconnect the negative battery cable.
2. Recover the refrigerant Refer to Refrigerant Recovery and Recharging Service and Repair.
3. Remove the suction hose/liquid pipe block retaining nuts at the fire wall.
4. Remove the expansion valve connector block retaining stud bolts.
5. Remove the expansion valve.
6. Discard the O-rings.
Installation Procedure
1. Clean the grooves that fit the O-rings of any dirt or contamination.
2. Install new O-rings on the evaporator tubes.
3. Install a expansion valve onto the evaporator tubes.
Notice: Refer to Fastener Notice Fastener Notice in Cautions and Notices.
4. Insert the expansion valve connector block retaining stud bolts.
Tighten the expansion valve retaining stud bolts to 8 Nm (71 lb in).
5. Install the suction hose/liquid pipe block retaining nuts.
Tighten the suction hose/liquid pipe block-to-expansion valve retaining nuts to 14 Nm (10 lb ft).
6. Connect the negative battery cable.
7. Evacuate and recharge the A/C system. Refer to Refrigerant Recovery and Recharging Service and Repair.
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.