A/C Suction Line - Installation

6.7L DIESEL ENGINE

CAUTION: Be certain to adjust the refrigerant oil level when servicing the A/C refrigerant system [1][2]Capacity Specifications . 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, see the Refrigerant Oil Capacities chart to determine how much oil should be added to the refrigerant system [1][2]Capacity Specifications .

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.





1. Position the A/C suction line (3) into the engine compartment.
2. Remove the tape or plugs from the opened refrigerant line fittings and expansion valve ports.
3. Lubricate new O-ring seals with clean refrigerant oil and install them onto the refrigerant 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. Connect the A/C liquid line (2) and A/C suction line at the A/C expansion valve (4).
5. Install the nut (1) that secures the A/C liquid and suction lines to the A/C expansion valve. Tighten the nut to 23 Nm (17 ft. lbs.).






NOTE: Illustration shown with lower radiator hose removed for clarity.

6. Remove the tape or plugs from the opened suction line fitting and compressor port.
7. Lubricate a new O-ring seal with clean refrigerant oil and install it and new gasket onto the suction line fitting. Use only the specified O-ring seal as it is 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.
8. Connect the A/C suction line (3) to the A/C compressor (2).
9. Install the nut (1) that secures the A/C suction line to the A/C compressor. Tighten the nut to 23 Nm (17 ft. lbs.).
10. Install the turbocharger outlet hose.
11. Install the air filter housing.
12. Reconnect the negative battery cable.
13. Evacuate the refrigerant system Refrigerant System Evacuate.
14. Adjust the refrigerant oil level [1][2]Capacity Specifications.
15. Charge the refrigerant system Refrigerant System Charge.