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 MANUALSFORD1984BRONCO L6-300 4.9L VIN K 1-BBLREPAIR AND DIAGNOSISHEATING AND AIR CONDITIONINGSERVICE AND REPAIRRETROFITTING WITH R-134ATOXICITY AND FLAMMABILITY
1984 Ford Bronco L6-300 4.9L VIN K 1-bbl
Toxicity and Flammability
1984 Ford Bronco L6-300 4.9L VIN K 1-bblSECTION Toxicity and Flammability
TOXICITY, FLAMMABILITY, AND CORROSION
According to the Environmental Protection Agency (EPA), R-134a is regarded as one of the safest refrigerants yet introduced, based on current toxicity data. The chemical industry's Program for Alternative Fluorocarbon Toxicity Testing (PAFT) tested R-134a in full battery of laboratory animal toxicity studies. The results indicate that R-134a does not pose a cancer or birth defects hazard. In addition, R-134a is being used in metered dose inhalers in Europe.
OEM engineers and chemical manufacturers have examined the flammability and corrosiveness of R-134a. Like CFC-12, R-134a is not flammable at ambient temperature and atmospheric pressure. However, R-134a service equipment and vehicle A/C systems should not be pressure tested or leak tested with compressed air. Some mixtures of air and R-134a have been shown to be combustible at elevated pressures. These mixtures may be potentially dangerous, causing injury or property damage. R-134a is not corrosive on standard steel, aluminum, and copper.
When handling R-134a, service technicians should be sure to work in a well ventilated area.
According to the Environmental Protection Agency (EPA), R-134a is regarded as one of the safest refrigerants yet introduced, based on current toxicity data. The chemical industry's Program for Alternative Fluorocarbon Toxicity Testing (PAFT) tested R-134a in full battery of laboratory animal toxicity studies. The results indicate that R-134a does not pose a cancer or birth defects hazard. In addition, R-134a is being used in metered dose inhalers in Europe.
OEM engineers and chemical manufacturers have examined the flammability and corrosiveness of R-134a. Like CFC-12, R-134a is not flammable at ambient temperature and atmospheric pressure. However, R-134a service equipment and vehicle A/C systems should not be pressure tested or leak tested with compressed air. Some mixtures of air and R-134a have been shown to be combustible at elevated pressures. These mixtures may be potentially dangerous, causing injury or property damage. R-134a is not corrosive on standard steel, aluminum, and copper.
When handling R-134a, service technicians should be sure to work in a well ventilated area.
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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.