5.7L Engine
Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE . Failure to properly adjust the refrigerant oil level will prevent the A/C system from operating as designed and can cause serious A/C compressor damage.
When replacing multiple A/C system components, refer to the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE .
Replacement of the refrigerant line O-ring seals and gaskets is required anytime a refrigerant line is disconnected. Failure to replace the rubber O-ring seals and metal gaskets could result in a refrigerant system leak.
Illustration shown with refrigerant lines removed for clarity.
- Remove the plugs or tape from the opened suction line fittings and the expansion valve and compressor ports.
- Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets onto the suction line fittings. Use only the specified O-ring seals as they are made of a special material for the R-134a system. Use only refrigerant oil of the type recommended for the A/C compressor in the vehicle.
- Position the A/C suction line (1) into the engine compartment.
- Install the two retaining brackets (2 and 3) that secure the A/C suction line (1) to the A/C discharge line (5) and to the upper front of the engine.
- Connect the A/C suction line (1) to the A/C compressor (4).
- Install the nut (2) that secures the A/C suction line to the A/C compressor. Tighten the nut to 23 N.m (17 ft. lbs.).
- Connect the A/C liquid line (2) and the A/C suction line (3) to the A/C expansion valve (4).
- Install the nut (1) that secures the A/C liquid and suction lines the A/C expansion valve. Tighten the nut to 23 N.m (17 ft. lbs.).
- Install the air filter housing cover and engine air inlet tube. Refer to BODY, AIR CLEANER, INSTALLATION, 5.7L .
- Reconnect the negative battery cable.
- Evacuate the refrigerant system. Refer to PLUMBING, STANDARD PROCEDURE .
- Adjust the refrigerant oil level. Refer to OIL, REFRIGERANT, STANDARD PROCEDURE .
- Charge the refrigerant system. Refer to PLUMBING, STANDARD PROCEDURE .