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 MANUALSFORD1990RANGER 4WD L4-140 2.3L SOHCREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGEXPANSION BLOCK/ORIFICE TUBESERVICE AND REPAIR
1990 Ford Ranger 4WD L4-140 2.3L SOHC
Expansion Block/Orifice Tube: Service and Repair
1990 Ford Ranger 4WD L4-140 2.3L SOHCSECTION Service and Repair
Fig. 2 Spring lock coupling disconnect & connect:
1. Discharge refrigerant from system.
2. Disconnect and cap liquid line from evaporator core inlet tube, Fig. 2.
3. Pour a small amount of refrigerant oil into inlet tube to lubricate orifice tube O-rings and inlet tube.
Fig. 5 Fixed orifice tube:
4. Using tool T83L-19990-A or equivalent, engage with the two tangs on the orifice tube, Fig. 5. Do not twist or rotate the fixed orifice tube in the evaporator core inlet tube, as it may break off.
5. Hold T-handle of removal tool to prevent it from turning, and run nut down against evaporator core tube until orifice tube is pulled from inlet tube.
6. Reverse procedure to install. Use new O-rings lubricated with refrigerant oil.
7. Leak test, evacuate and charge system.
RENDER: 1.0x
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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.