Adapter for Assembly of Flushing Circuits
WARNING: This page does not describe the selected car, but rather 17 other vehicles, including the 2009 Audi S4, 2009 Audi A4, 2008 Audi S4, 2008 Audi RS 4, and 2008 Audi A4. However, it is still accessible from the selected car via links, so may be relevant.
- The following table lists the different adapters necessary for the connection of the A/C service station to the refrigerant circuit, flushing and bridging of the removed fluid reservoir or reservoir and the expansion valve (vehicle-specific).
- Connect the two adapters that were installed when reservoir or fluid reservoir was removed (included in adapter case for VW/Audi passenger cars VAS 6338/1 ) with a fill hose with connections 5/8 -18 UNF (short version e.g. fill hose VAS 6338/31 ).
- If a flushed refrigerant circuit is not reassembled immediately after flushing, adapters remain at connections and seal the connections at the adapters using shipping caps VAS 6338/30 (from adapter case for VW/Audi passenger cars VAS 6338/1 ).
- Depending on the version of the compressor and time period of production, different connection and sealing techniques can be found for the refrigerant circuit → 87 - Air conditioning
Block or threaded connections
- Threaded connection - A -
- Block connection - B -
Block connections with various types of sealing
- Block connection with radially sealed connection - A - (with plastic or metal guide - B - )
- Block connection with axially sealed connection - C -
Audi A3, Audi TT and Audi A2
| Vehicle | Adapters necessary for the connections to the compressor | Adapters necessary for the connections to the reservoir or fluid reservoir | Miscellaneous |
| Audi A2 (8Z_) 2001 | Compressor manufacturer Denso Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/2 | Accumulator Threaded connection at input adapter VAS 6338/9 Block connection with axial sealing at output adapter VAS 6338/10 | - Restrictor removed, connections reconnected |
| A3 (8L_) 1997 up to 2004 and Audi TT (8N_) 1999 μ | Compressor manufacturer Sanden or Zexel Low pressure side adapter VAS 6338/7 High pressure side adapter VAS 6338/2 | Receiver Block connections with axial sealing at input and output adapter VAS 6338/2 (necessary 2 times) | Expansion valve removed and adapter VAS 6338/19 installed (or drilled expansion valve, e.g. 6N0 820 679 C installed) |
| A3 (8P_) 2004 μ | Compressor manufacturer Sanden , Denso or Zexel Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/3 | Receiver No adapter needed, the receiver remains installed | Expansion valve removed and adapter VAS 6338/18 installed (or drilled expansion valve, e.g. 1K0 820 679 installed) |
Audi 80 , Audi 90, Audi Coupe, Audi Cabriolet and Audi A4
| Vehicle | Adapters necessary for the connections to the compressor | Adapters necessary for the connections to the accumulator | Miscellaneous |
| Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_) 2002 Audi A4 (8D_) 1995 up to 2002 | Compressor manufacturer Zexel (threaded connections) Low pressure side adapter VAG 1785/8 High pressure side adapter VAG 1785/7 | Accumulator with various versions of connections Version 1 Threaded connection at input adapter VAS 6338/9 Threaded connection at output adapter VAG 1785/8 | - Restrictor removed, connections reconnected |
| Compressor manufacturer Denso (block connections with radial and axial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/2 | Version 2 Threaded connection at input adapter VAS 6338/9 Block connection with axial sealing at output adapter VAS 6338/10 | ||
| A4 (8E_) 2001 , Audi A4 Cabriolet (8H_) 2003 | Compressor manufacturer Denso (block connections with radial and axial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/2 | Accumulator with various versions of connections Version 1 Block connections with axial sealing at input and output Adapter VAS 6338/10 (2x needed) | - Restrictor removed, connections reconnected |
| Compressor manufacturer Denso (block connections with radial sealing) Heating, Ventilation and Air Conditioning 87 Compressor, Removing and Installing Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/3 | Version 2 Block connections with radial sealing at input and output Adapter VAS 6338/8 (2x needed) |
Audi 100, Audi A6, Audi Allroad and Audi V8
| Vehicle | Adapters necessary for the connections to the compressor | Adapters necessary for the connections to the accumulator | Miscellaneous |
| Audi 100/Audi A6 (4A_) through 1998 Audi A6 (4B_) from 1998 Audi Allroad Audi V8 (4C_) through 1994 | Compressor manufacturer Zexel (threaded connections) Low pressure side adapter VAG 1785/8 High pressure side adapter VAG 1785/7 | Accumulator with various versions of connections Version 1 Threaded connection at input adapter VAS 6338/9 Threaded connection at output adapter VAG 1785/8 | - Restrictor removed, connections reconnected |
| Compressor manufacturer Denso (block connections with radial and axial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/2 | Version 2 Threaded connection at input adapter VAS 6338/9 Block connection with axial sealing at output adapter VAS 6338/10 Version 3 Block connections with axial sealing at input and output adapter VAS 6338/10 (necessary 2 times) | ||
| Audi A6 (4F_) from 2005 | Compressor manufacturer Denso (block connections with radial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/3 | Accumulator with radially sealed block connections at input and output Adapter VAS 6338/8 (2x needed) | - Restrictor removed, connections reconnected |
Audi A8
| Vehicle | Adapters necessary for the connections to the compressor | Adapters necessary for the connections to the accumulator | Miscellaneous |
| Audi A8 (4D_) 1994 up to 2002 | Compressor manufacturer Zexel (threaded connections) Low pressure side adapter VAG 1785/8 High pressure side adapter VAG 1785/7 | Accumulator with various versions of connections Version 1 Threaded connection at input adapter VAS 6338/9 Threaded connection at output adapter VAG 1785/8 | - Restrictor removed, connections reconnected |
| Compressor manufacturer Denso (block connections with radial and axial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/2 | Version 2 Threaded connection at input adapter VAS 6338/9 Block connection with axial sealing at output adapter VAS 6338/10 Version 3 Block connections with axial sealing at input and output adapter VAS 6338/10 (necessary 2 times) | ||
| Audi A8 (4E_) from 2003 | Compressor manufacturer Denso (block connections with radial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/3 | Accumulator Block connections with radial sealing at input and output Adapter VAS 6338/8 (2x needed) | - Restrictor removed, connections reconnected |
Audi Q7
| Vehicle | Adapters necessary for the connections to the compressor | Required adapters for connections to fluid reservoir / to second evaporator. | Miscellaneous |
| Audi Q7 (4L_) from 2006 Vehicles with one evaporator (2 zone A/C system) | Compressor manufacturer Denso (block connections with radial sealing) Low pressure side adapter VAS 6338/12 High pressure side adapter VAS 6338/3 | No adapter required, dryer is removed from fluid reservoir on condenser and the opening is re-sealed. | Expansion valve removed and adapter VAS 6338/17 installed (or drilled expansion valve, e.g. 7L0 820 712 A installed). |
| Additional on vehicles with 2 evaporators (4 zone A/C system) | To flush circuit with evaporator in front A/C unit Adapter VAS 6338/5 for sealing the low-pressure side connection (to second evaporator) Adapter VAS 6338/11 for sealing the high-pressure side connection (to second evaporator) | ||
| To flush second evaporator and corresponding lines Adapter VAS 6338/3 for connecting service station to the low-pressure side connection (to second evaporator). Adapter VAS 6338/4 for connecting service station to the high-pressure side connection (to second evaporator). | Expansion valve on second evaporator removed and adapter VAS 6338/17 installed (or drilled expansion valve, e.g. 7L0 820 712 A installed). |
NOTE:
- In vehicles with two evaporators, refrigerant circuit is flushed in two work steps.