A/C Discharge Line - Installation

5.7L ENGINE

CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system Refrigerant Oil Capacity . 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.

NOTE: 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 Refrigerant Oil Capacity .

NOTE: 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.






NOTE: Illustration shown with refrigerant lines removed for clarity.

1. If removed, install the A/C pressure transducer (4) onto the A/C discharge line (3) A/C Pressure Transducer - Installation.
2. Remove the plugs or tape from the opened discharge line fittings and compressor and jumper line ports.
3. Lubricate new O-ring seals with clean refrigerant oil and install them and new gaskets onto the discharge 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.
4. Position the A/C discharge line (5) into the engine compartment.
5. Install the two retaining brackets (2 and 3) that secure the A/C discharge line to the A/C suction line (1) and to the upper front of the engine.
6. Connect the wire harness connector to the A/C pressure transducer.





7. Connect the A/C discharge line (3) to the A/C compressor (4).
8. Install the nut (2) that secures the A/C discharge line to the A/C compressor. Tighten the nut to 23 Nm (17 ft. lbs.).





9. Connect the A/C discharge line to the condenser jumper line tapping block (1) and install the nut (2). Tighten the nut to 23 Nm (17 ft. lbs.).
10. Reconnect the negative battery cable.
11. Evacuate the refrigerant system Refrigerant System Evacuate.
12. Adjust the refrigerant oil level Refrigerant Oil Capacity.
13. Charge the refrigerant system Refrigerant System Charge.