Overview - Expansion Valve And Refrigerant Lines To Rear Heater And A/C Unit, Pr Number 9AH/ 9AQ
WARNING: This page is about a different car, the 2023 Audi SQ8, 2023 Audi RS Q8, and 2023 Audi Q8. However, it is still accessible from the selected car via links, so may be relevant.
Fig 1: Exploded View Of Expansion Valve And Refrigerant Lines To The Rear Heater And A/C Unit, Vehicles With "High A/C System"
- Pass-Through for the Refrigerant Lines in the Vehicle Interior
- To evaporator in rear heater and A/C unit
- Removing and Installing. Refer to HEATER AND A/C UNIT, REMOVING AND INSTALLING, "High" A/C SYSTEM, PR NUMBER 9AH/ 9AQ .
- Nut
- To the threaded pin on the refrigerant line bracket on the evaporator in the rear heater and A/C unit
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Refrigerant Line - Low Pressure Side
- On the underbody in the area of the center tunnel
- From the refrigerant line opening in the vehicle interior to the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Refrigerant Line - Low Pressure Side
- On the underbody in the area of the center tunnel
- From the expansion valve to the refrigerant line opening in the vehicle interior
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Retaining Plate
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Bolt
- Quantity: 2
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Nut
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- 9 Nm
- Rear Expansion Valve
- There are different versions. Refer to the Parts Information.
- Refrigerant Line, Disconnecting and Connecting. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM REAR EXPANSION VALVE TO EVAPORATOR IN REAR HEATER AND A/C UNIT .
- Removing and Installing. Refer to REAR EXPANSION VALVE, REMOVING AND INSTALLING .
- There are different versions depending on the refrigerant (R134a or R1234yf). Refer to Parts Information.
- Bracket
- For the refrigerant lines on the underbody
- Refrigerant Line - Low Pressure Side
- On the underbody
- From the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Nut
- 2 Nm
- Refrigerant Line - High Pressure Side
- On the underbody
- To the expansion valve
- Removing and installing on the rear expansion valve. Refer to REFRIGERANT LINES, REMOVING AND INSTALLING, FROM CONNECTION POINT TO REAR EXPANSION VALVE .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Nut
- Quantity: 2
- 4 Nm
- Bracket
- For the refrigerant lines on the underbody
- Bolt
- 9 Nm
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Bracket
- For the refrigerant lines on the underbody
- Nut
- Quantity: 2
- 4.5 Nm
- Bolt
- 9 Nm
- Refrigerant Line - Low Pressure Side
- On the underbody and under the left fender
- To the opening in the plenum chamber
- Removing and installing from the pass-through in the plenum chamber. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- Removing and Installing. Refer to REFRIGERANT LINES, DISCONNECTING AND CONNECTING .
- Bolt
- 9 Nm
- Refrigerant Line - High Pressure Side
- On the underbody and under the left fender
- From the opening in the plenum chamber
- Removing and installing from the pass-through in the plenum chamber. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- Removing and Installing. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- O-Ring
- Replace after removing; version. Refer to REFRIGERANT CIRCUIT SEALS and the Parts Information.
- Lubricate lightly with refrigerant oil before installing
- Pass-Through for Refrigerant Lines in the Plenum Chamber
- There are different versions. Refer to the Parts Information.
- This illustration shows the version for vehicles with a second evaporator (with a "High" A/C system)
- Removing and Installing. Refer to PLENUM CHAMBER REFRIGERANT LINE PASS-THROUGH, REMOVING AND INSTALLING .