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 MANUALSCHEVROLET1986CHEVETTE L4-98 1.6LREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGEXPANSION BLOCK/ORIFICE TUBESERVICE AND REPAIR
1986 Chevrolet Chevette L4-98 1.6L
Expansion Block/Orifice Tube: Service and Repair
1986 Chevrolet Chevette L4-98 1.6LSECTION Service and Repair
EXC. TORONADO.
1. Discharge system refrigerant.
2. Loosen nut at liquid line to evaporate inlet pipe connection. Carefully remove tube, using needle nosed pliers, or other suitable tool. If expansion tube is seized in its receptacle, remove impacted residue as completely as possible. Using a suitable heat gun or equivalent (hair dryer), apply heat to area 1/4 inch from inlet pipe dimples (if pressure switch is located near this area, remove switch before applying heat to prevent damage). While applying heat, grip expansion tube and apply a push-pull/turning motion to loosen. When tube has been removed, clean receptacle with R-11 or equivalent solvent. Add 1 oz. 525 viscosity refrigerant oil to system, lubricate new tube and O-ring with same, and install.
3. Reverse procedure to install, with shorter screen end in first.
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.