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.
1991 Pontiac Firebird V8-350 5.7LFACTORY OEM SERVICE PROCEDURE
Oil Charge
When replacing certain components of an air conditioning system a oil charge must be added to the system to keep the proper level of refrigerant oil in the system. Refer to SPECIFICATIONS/MECHANICAL SPECIFICATIONS/OIL CHARGE DATA TABLE for oil charge specifications.
If the refrigerant charge is abruptly lost due to a large refrigerant leak, approximately three ounces of refrigerant oil will be carried out of the system with the refrigerant. Upon replacement of a component which caused a large refrigerant leak, add three ounces of oil to the system plus the amount required for any component replaced as outlined under SPECIFICATIONS/MECHANICAL SPECIFICATIONS/OIL CHARGE DATA TABLE. If possible, add oil directly to the replacement component.
If the refrigerant charge is abruptly lost due to a large refrigerant leak, approximately three ounces of refrigerant oil will be carried out of the system with the refrigerant. Upon replacement of a component which caused a large refrigerant leak, add three ounces of oil to the system plus the amount required for any component replaced as outlined under SPECIFICATIONS/MECHANICAL SPECIFICATIONS/OIL CHARGE DATA TABLE. If possible, add oil directly to the replacement component.
Factory Service Tools
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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.
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