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 MANUALSCHEVROLET1994ASTRO VAN M V6-262 4.3L VIN ZREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRSYSTEM SERVICE
1994 Chevrolet Astro Van M V6-262 4.3L VIN Z
System Service
1994 Chevrolet Astro Van M V6-262 4.3L VIN ZSECTION System Service
REFRIGERANT RECOVERY AND RECYCLING, ADDING OIL, EVACUATING AND RECHARGING PROCEDURES.
The Air Conditioning Refrigerant Recovery, Recycling and Recharging system ACR 4: (J3950O) (or equivalent) removes Refrigerant-134a from the vehicle A/C system, recycles and recharges all with one hook up.
Single pass filtering during recovery cycle, plus automatic multiple pass filtering during evacuation cycle assures constant supply of clean/dry refrigerant for A/C system charging.
NOTICE:
^ R-12 and R-134a require separate and non-interchangeable sets of recovery, recycle and recharge equipment. The refrigerants and lubricants are not compatible and cannot be mixed even in the smallest amounts.
^ Do not attempt to use one set of equipment for both R-12 and R-134a, as all equipment contains residual amounts of refrigerant and/or lubricant which will result in contamination, and damage to the recovery/cycle equipment.
The Air Conditioning Refrigerant Recovery, Recycling and Recharging system ACR 4: (J3950O) (or equivalent) removes Refrigerant-134a from the vehicle A/C system, recycles and recharges all with one hook up.
Single pass filtering during recovery cycle, plus automatic multiple pass filtering during evacuation cycle assures constant supply of clean/dry refrigerant for A/C system charging.
NOTICE:
^ R-12 and R-134a require separate and non-interchangeable sets of recovery, recycle and recharge equipment. The refrigerants and lubricants are not compatible and cannot be mixed even in the smallest amounts.
^ Do not attempt to use one set of equipment for both R-12 and R-134a, as all equipment contains residual amounts of refrigerant and/or lubricant which will result in contamination, and damage to the recovery/cycle equipment.
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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.