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HOMESERVICE MANUALSAUDI2010A3 2.0T, 2.0 E, STANDARDREPAIR AND DIAGNOSISHEATING, VENTILATION & A/C (HVAC)HVAC CONTROL SYSTEMSGENERAL, TECHNICAL DATA - REFRIGERANT R134A SERVICING (1 OF 2)GENERAL, TECHNICAL DATADESCRIPTION AND OPERATIONREFRIGERANT CIRCUITADAPTER FOR ASSEMBLING FLUSHING CIRCUIT
2010 Audi A3 2.0T, 2.0 E, Standard
Adapter For Assembling Flushing Circuit
2010 Audi A3 2.0T, 2.0 E, StandardSECTION Adapter For Assembling Flushing Circuit
- Various adapters which are required to connect the A/C service station to the refrigerant circuit for flushing and to bridge the removed fluid reservoir or reservoir and expansion valve (specific to vehicle) are in the following table.
- Using a charge hose with 5/8 -18 UNF connections (short version, for example, Charge hose VAS 6338/31), connect the two adapters (contained in VW/Audi passenger vehicle set adapter chest VAS 6338/1) which have been installed for the removed reservoir or fluid reservoir.
- 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. Refer to Removal and Installation .
- Beginning the production year 2006, the name of the Zexel A/C compressor was changed from Zexel to Valeo.
Block or screw connections
-- Screw connection -A-
-- Block connection -B-
Block connections with different types of seals
-- Block connection with radially sealed connection -A- (with plastic or metal guide -B-)
-- Block connection with axial sealing connection -C-
Audi A3 and Audi TT
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Adapters Necessary For The Connections To The Reservoir Or Fluid Reservoir | Other |
|---|---|---|---|
| Audi A3 (8L_) from MY 97 Audi TT (8N_) from MY 99 | -- Compressor manufacturer Sanden or Zexel / Valeo
|
Fluid Reservoir-- 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, for example 6N0 820 679 C installed REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ) |
| Audi A3 (8P_) from MY 04 Audi TT (8J_) from MY 07 | -- A/C compressor manufacturer for the Audi TT Denso
|
Reservoir (different versions)-- No adapter needed, the receiver remains installed-- Depending on the condenser version, remove the dryer cartridge from the reservoir on the condenser before flushing and then seal the opening again (see note). | Expansion valve removed and Adapter VAS 6338/18 installed (or drilled expansion valve, for example 1K0 820 679 installed REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ) |
NOTE:
- The version of the reservoir on the Audi A3 and the Audi TT will different depending on the manufacturer of the condenser. An Audi TT with a 5-cylinder engine has a condenser in a different version than on a model with a 4- or 6-cylinder engine. The reservoir is, for example, inside the condenser. If the integrated reservoir has a dryer cartridge, which is no longer available as a single part. If there are complaints, then it is necessary to replace the complete condenser. Refer to and Removal and Installation .
- If the reservoir / dryer cartridge is integrated in the condensor, then they cannot be replaced individually or are not available as a single part, and the condenser must be replaced. Refer to Removal and Installation
Audi 80, Audi 90, Audi Coupe, Audi Cabriolet and Audi A4
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Adapters Necessary For The Connections To The Accumulator | Other |
|---|---|---|---|
| Audi 80 (8A_/8C_), Audi Coupe (8B_), Audi Cabriolet (8G_) through MY 02 Audi A4 (8D_) from MY 1995 | -- Compressor manufacturer Zexel / Valeo (threaded connections)
|
Accumulator with various versions of connections
|
- Restrictor removed, connections reconnected |
-- Compressor manufacturer Denso (block connections with radial and axial sealing)
|
|
||
| Audi A4 (8E_) from MY 01 Audi A4 Cabriolet (8H_) from MY 03 | -- Compressor manufacturer Denso (block connections with radial and axial sealing)
|
Accumulator with various versions of connections
|
- Restrictor removed, connections reconnected |
-- A/C compressor manufacturer "Denso" (block connections with radial sealing). Refer to Removal and Installation
(vehicle-specific repair information).
|
|
||
| Audi A4 (8K_) from MY 08 | -- Compressor manufacturer Denso
|
Reservoir (different versions)-- No adapter needed, the receiver remains installed-- Depending on the condenser version, remove the dryer cartridge from the reservoir on the condenser before flushing and then seal the opening again (see note). | Expansion valve removed and Adapter VAS 6338/36 installed (or drilled expansion valve, for example 1K0 820 679 A installed REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A )-- The refrigerant line with the inner heat exchanger remains installed or will be installed after installing the adapter. |
NOTE:
- The reservoir on the Audi A4 (8K_) from MY 2008 has different versions, depending on the depending on the manufacturer. Refer to Removal and Installation . The reservoir may be attached to or integrated in the condenser, depending on the version of the condenser. If the integrated reservoir has a dryer cartridge, which is no longer available as a single part. If there are complaints, then it is necessary to replace the complete condenser.
- If the reservoir / dryer cartridge is integrated in the condensor, then they cannot be replaced individually or are not available as a single part, and the condenser must be replaced. Refer to Removal and Installation
Audi A5 Coupe and Sportback, Audi Q5, Audi A5 Cabriolet
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Required Adapters For The Connections To Fluid Reservoir | Other |
|---|---|---|---|
| Audi A5 Coupe and Sportback (8T_) from MY 08 Audi Q5 (8R_) from MY 08 Audi A5 Cabriolet (8F_) from MY 09 | -- Compressor manufacturer Denso
|
Reservoir (different versions)-- No adapter needed, the receiver remains installed-- Depending on the condenser version, remove the dryer cartridge from the reservoir on the condenser before flushing and then seal the opening again (see note). | Expansion valve removed and Adapter VAS 6338/36 installed (or drilled expansion valve, for example, 1K0 820 679 A installed REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A )-- The refrigerant line with the inner heat exchanger remains installed or will be installed after installing the adapter. |
NOTE:
- There are different versions of the reservoir on these vehicles depending on the manufacturer. Refer to Removal and Installation . The reservoir may be attached to or integrated in the condenser, depending on the version of the condenser. If the integrated reservoir has a dryer cartridge, which is no longer available as a single part. If there are complaints, then it is necessary to replace the complete condenser.
- If the reservoir / dryer cartridge is integrated in the condensor, then they cannot be replaced individually or are not available as a single part, and the condenser must be replaced. Refer to Removal and Installation
Audi Q5 Hybrid
| Vehicle | Required adapters for the connectors to / on the A/C compressor | Required adapters for the connections to fluid reservoir | Other |
|---|---|---|---|
| Audi Q5 (8R_) from 2011 | Required adapters for the connectors to A/C compressor-- Compressor manufacturer "Denso"
|
Reservoir (different versions)-- No adapter needed, the receiver remains installed-- Depending on the condenser version, remove the dryer cartridge from the reservoir on the condenser before flushing and then seal the opening again (see note). | Expansion valve removed and adapter VAS 6338/36 installed (or drilled expansion valve, for example 1K0 820 679 A installed REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A )-- The refrigerant line with the inner heat exchanger remains installed or will be installed after installing the adapter. |
|
To rinse the circuit with the evaporator in the A/C unit and the condenser
|
To rinse the circuit there are several methods
|
|
To rinse the evaporator in the battery cooling module and the corresponding lines
|
The expansion valve in the refrigerant pipes and for the second evaporator is removed and the adapter VAS 6338/36 installed (or the removed expansion valve is drilled for flushing and installed again REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). | ||
Required adapter / wires for the connections to the electrically driven A/C compressor (to rinse the A/C compressor)
|
|
NOTE:
- In vehicles with two evaporators, refrigerant circuit is flushed in two / three work steps.
- Currently the expansion valve on the evaporator in the A/C system and on the evaporator in the battery cooling module have the same connections (only the control characteristics and those on the hybrid battery refrigerant shut-off valve 2 -N517- are different).
- The refrigerant circuit cannot be rinsed for the one installed in the circuit to the evaporator in the A/C system for a hybrid battery refrigerant shut-off valve 1 -N516-. The hybrid battery refrigerant shut-off valve 1 is in a tight spot and prevents the refrigerant from reaching a sufficient flow speed. In the event that there are two adapters VAG 1785/5 and the hybrid battery refrigerant shut-off valve 1 cannot be drilled, the circuit with the evaporator in the A/C unit can be rinsed using an additional work procedure (reassemble the circuit with a filler hose and two VAG 1785/5). In the event that only one VAG 1785/5i s available and the hybrid battery refrigerant shut-off valve 1 is not drilled, the circuit must be rinsed in two steps. From the low pressure connection on the A/C compressor above the evaporator in the A/C system to the connection for the removed hybrid battery refrigerant shut-off valve 1 and from the connection for the removed hybrid battery refrigerant shut-off valve 1 above the condenser to the high pressure connection on the A/C compressor.
- There are different versions of the reservoir on these vehicles depending on the manufacturer. Refer to Description and Operation . The reservoir may be attached to or integrated in the condenser, depending on the version of the condenser. If the integrated reservoir has a dryer cartridge, which is no longer available as a single part. If there are complaints, then it is necessary to replace the complete condenser.
- If the reservoir / dryer cartridge is integrated in the condenser, then they cannot be replaced individually or are not available as a single part, and the condenser must be replaced. Refer to Removal and Installation .
Audi 100, Audi A6 (4A_, 4B_ und 4F_), Audi Allroad and Audi V8
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Adapters Necessary For The Connections To The Accumulator | Other |
|---|---|---|---|
| Audi 100 / Audi A6 (4A_) through MY 1998 Audi A6 (4B_) from MY1998 Audi allroad (4B_) through MY 2005 Audi V8 (4C_) through 1994 | -- Compressor manufacturer Zexel / Valeo (threaded connections)
|
Accumulator with various versions of connections
|
- Restrictor removed, connections reconnected |
-- Compressor manufacturer Denso (block connections with radial and axial sealing)
|
|
||
| Audi A6 (4F_) from MY 05 | -- Compressor manufacturer Denso (block connections with radial sealing)
|
-- Accumulator with radially sealed block connections at input and output
|
- Restrictor removed, connections reconnected |
NOTE:
The specifications for the Audi A6 (4F_) from MY 05 also apply to the Audi S6 and Audi RS6.
Audi A6 (4G_), Audi A7 (4G_)
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Required Adapters For The Connections To Fluid Reservoir | Other |
|---|---|---|---|
| Audi A6 (4G_) from MY 11 Audi A7 (4G_) from MY 11 | -- Compressor manufacturer Denso
|
Reservoir (different versions)-- No adapter needed, the receiver remains installed-- Depending on the condenser version, remove the dryer cartridge from the reservoir on the condenser before flushing and then seal the opening again (see note). | The expansion valve is removed and the Adapter VAS 6338/36 (or the removed expansion valve is drilled for flushing and installed again REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). |
NOTE:
- There are different versions of the reservoir on these vehicles depending on the manufacturer. Refer to Removal and Installation .
- If the reservoir / dryer cartridge is integrated in the condensor, then they cannot be replaced individually or are not available as a single part, and the condenser must be replaced. Refer to Removal and Installation .
Audi A8
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Adapters Necessary For The Connections To The Accumulator | Other |
|---|---|---|---|
| Audi A8 (4D_) from MY 94 | -- Compressor manufacturer Zexel / Valeo (threaded connections)
|
Accumulator with various versions of connections
|
- Restrictor removed, connections reconnected |
-- Compressor manufacturer Denso (block connections with radial and axial sealing)
|
|
||
| Audi A8 (4E_) from MY 03 | -- Compressor manufacturer Denso (block connections with radial sealing)
|
Reservoir-- Block connections with radial sealing at input and output
|
- Restrictor removed, connections reconnected |
| Audi A8 (4H_) from MY 10 | -- Compressor manufacturer Denso (block connections with radial sealing)
|
-- No adapter required, dryer bag is removed from fluid reservoir on the condenser and the opening is sealed again for flushing. | The expansion valve is removed and the Adapter VAS 6338/18 (or the removed expansion valve is drilled for flushing and installed again REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). |
|
To flush circuit with evaporator in front A/C unit
|
||
To flush the second evaporator and corresponding lines
|
The expansion valve in the refrigerant pipes and for the second evaporator is removed and the Adapter VAS 6338/18 installed (or the removed expansion valve is drilled for flushing and installed again REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). |
NOTE:
- In vehicles with two evaporators, 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 Adapters VAS 6338/5 and VAS 6338/11.
-- Drill a hole -A- (the dimensions in the illustration are given in mm).
Rework the Adapter VAS 6338/3.
-- Sand off or file off the Adapter VAS 6338/3 near -A- without bending the refrigerant pipe (dimensions are in mm).
Audi Q7
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Required Adapters For Connections To Fluid Reservoir / To Second Evaporator. | Other |
|---|---|---|---|
Audi Q7 (4L_) from MY 06
|
-- Compressor manufacturer Denso (block connections with radial sealing)
|
-- No adapter required, dryer is removed from fluid reservoir on condenser and the opening is sealed. | Expansion valve removed and Adapter VAS 6338/17 or adapter VAS 6338/33installed (depending on the expansion valve version or a drilled expansion valve, for example, 7L0 820 712 A or 7H0 820 679 B or 7L0 820 679 C installed, refer to REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). |
|
To flush circuit with evaporator in front A/C unit
|
||
To flush the second evaporator and corresponding lines
|
Expansion valve on second evaporator removed and Adapter VAS 6338/17 installed (or drilled expansion valve, for example, 7L0 820 712 A installed, refer to REFRIGERANT CIRCUIT FLUSHING WITH REFRIGERANT R134A ). |
NOTE:
In vehicles with two evaporators, refrigerant circuit is flushed in two work steps.
Audi R8
| Vehicle | Required Adapters For The Connectors To A/C Compressor | Adapters Necessary For The Connections To The Accumulator | Other |
|---|---|---|---|
| Audi R8 (42_) from MY 08 | -- Compressor manufacturer Denso (block connections with radial sealing)
|
Reservoir-- Block connections with radial sealing at input and output
|
- Restrictor removed, connections reconnected |
NOTE:
- The A/C compressor can only be removed when the engine is removed on the Audi R8. The refrigerant lines must be removed in order to be able to flush the refrigerant circuit. Refer to Removal and Installation (vehicle-specific repair information).
- Both installed condensers are flushed in opposite direction of the refrigerant flow direction.
RENDER: 1.0x
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.