AUDI A8 (4H)

Vehicle	Required adapters for the connections to A/C compressor	Adapters necessary for the connections to the reservoir or receiver/dryer	Miscellaneous
Audi A8 (4H_) from MY 2010	-- Compressor manufacturer "Denso" (block connections with radial sealing) Low pressure side Refrigerant Circuits Adapter Set 1 - Adapter 12:VAS6338/12 connected with the A/C Service Station and the Refrigerant Circuits Adapter Set - Adapter 48:VAS6338/48 High pressure side: Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3	-- No adapter required, desiccant bag is removed from receiver/dryer on the condenser and the opening is sealed again for flushing.	The expansion valve is removed and the Refrigerant Circuits Adapter 18:VAS6338/18 (or the removed expansion valve is drilled for flushing and installed again (refer to CLEANING THE REFRIGERANT CIRCUIT, PRELIMINARY WORK (FLUSHING WITH REFRIGERANT R1234YF) )).
Additionally on a vehicle with two evaporators (four zone A/C system)		To flush the circuit with the evaporator in the front A/C unit Refrigerant Circuits Adapter Set 1 - Adapter 5:VAS6338/5 for sealing the "low pressure side" connection ((to the second evaporator). Refrigerant Circuits Adapter Set 1 - Adapter 11:VAS6338/11 for sealing the "high pressure side" connection ((to the second evaporator). The adapter may need an additional hole (see below) so that the refrigerant pipes can be covered with the Refrigerant Circuits Adapter Set 1 - Adapter 5:VAS6338/5 and Refrigerant Circuits Adapter Set 1 - Adapter 11 :VAS6338/11 .
		To flush the second evaporator and corresponding lines Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3 for connecting the A/C service station to the "low-pressure side" connection (to the second evaporator). Refrigerant Circuits Adapter Set 1 - Adapter 4:VAS6338/4 for connecting the A/C service station to the "high-pressure side" connection (to the second evaporator). It may be necessary to rework the adapter (see below) so that the refrigerant pipe can be attached to the Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3 .	The expansion valve in the refrigerant lines to the second evaporator is removed and the Refrigerant Circuits Adapter 18:VAS6338/18 is installed (or the old removed expansion valve is drilled for flushing and reinstalled (refer to CLEANING THE REFRIGERANT CIRCUIT, PRELIMINARY WORK (FLUSHING WITH REFRIGERANT R1234YF) )).

Vehicle

Required adapters for the connections to A/C compressor

Adapters necessary for the connections to the reservoir or receiver/dryer

Miscellaneous

Audi A8 (4H_) from MY 2010

-- Compressor manufacturer "Denso" (block connections with radial sealing)

Low pressure side Refrigerant Circuits Adapter Set 1 - Adapter 12:VAS6338/12 connected with the A/C Service Station and the Refrigerant Circuits Adapter Set - Adapter 48:VAS6338/48
High pressure side: Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3

-- No adapter required, desiccant bag is removed from receiver/dryer on the condenser and the opening is sealed again for flushing.

The expansion valve is removed and the Refrigerant Circuits Adapter 18:VAS6338/18 (or the removed expansion valve is drilled for flushing and installed again (refer to CLEANING THE REFRIGERANT CIRCUIT, PRELIMINARY WORK (FLUSHING WITH REFRIGERANT R1234YF) )).

Additionally on a vehicle with two evaporators (four zone A/C system)

To flush the circuit with the evaporator in the front A/C unit

Refrigerant Circuits Adapter Set 1 - Adapter 5:VAS6338/5 for sealing the "low pressure side" connection ((to the second evaporator).
Refrigerant Circuits Adapter Set 1 - Adapter 11:VAS6338/11 for sealing the "high pressure side" connection ((to the second evaporator).

The adapter may need an additional hole (see below) so that the refrigerant pipes can be covered with the Refrigerant Circuits Adapter Set 1 - Adapter 5:VAS6338/5 and Refrigerant Circuits Adapter Set 1 - Adapter 11 :VAS6338/11 .

To flush the second evaporator and corresponding lines

Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3 for connecting the A/C service station to the "low-pressure side" connection (to the second evaporator).
Refrigerant Circuits Adapter Set 1 - Adapter 4:VAS6338/4 for connecting the A/C service station to the "high-pressure side" connection (to the second evaporator).

It may be necessary to rework the adapter (see below) so that the refrigerant pipe can be attached to the Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3 .

The expansion valve in the refrigerant lines to the second evaporator is removed and the Refrigerant Circuits Adapter 18:VAS6338/18 is installed (or the old removed expansion valve is drilled for flushing and reinstalled (refer to CLEANING THE REFRIGERANT CIRCUIT, PRELIMINARY WORK (FLUSHING WITH REFRIGERANT R1234YF) )).

NOTE:

In vehicles with two evaporators, the refrigerant circuit is flushed in two work steps.

Currently the front and rear expansion valves have the same connections (only the control characteristics are different)

Drill an additional hole in the Refrigerant Circuits Adapter Set 1 - Adapter 5:VAS6338/5 and Refrigerant Circuits Adapter Set 1 - Adapter 11 :VAS6338/11 .

-- Drill a hole -A- in addition to the already existing hole (the dimensions in the illustration are given in mm).

Courtesy of AUDI OF AMERICA, LLC

Rework the Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3

-- Grind off or file off the Refrigerant Circuits Adapter Set 1 - Adapter 3:VAS6338/3 near -A- without bending the refrigerant line (dimensions in the illustration are in mm).

Courtesy of AUDI OF AMERICA, LLC