Preliminary Work

WARNING: This page is about a different car, the 2014 Volkswagen Touareg, 2013 Volkswagen Touareg, 2012 Volkswagen Touareg, and 2011 Volkswagen Touareg. However, it is still accessible from the selected car via links, so may be relevant.

-- Discharge the refrigerant circuit. Refer to REFRIGERANT CIRCUIT, DISCHARGING WITH A/C Service Station .

-- Remove the A/C compressor. Refer to Heating, Ventilation and Air Conditioning.

On a vehicle with a restrictor and reservoir.

-- Remove the restrictor (vehicle-specific) and reconnect the refrigerant pipes with each other. Refer to Heating, Ventilation and Air Conditioning.

-- Remove the reservoir (vehicle-specific) (refer to Heating, Ventilation and Air Conditioning) and connect the refrigerant pipes to each other (to do this, use the adapters and the Hose:VAS6338/31 from Refrigerant Circuits Adapter Set 1:VAS6338/1 ). Refer to ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .

NOTE:

The reservoir could be flushed, but it requires too much refrigerant due to its large volume. When this refrigerant is evacuated, the reservoir ices up severely and this prolongs the extraction process significantly.

Vehicle with Expansion Valve and Receiver/Dryer

-- Remove the receiver/dryer (refer to Heating, Ventilation and Air Conditioning) (vehicle-specific; not required for all vehicles) and connect the refrigerant pipes to each other (for this, use adapters and Hose:VAS6338/31 ). Refer to ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .

-- Remove the expansion valve (vehicle-specific) (refer to Heating, Ventilation and Air Conditioning) and install the adapter for it. Refer to ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .

NOTE:

If no suitable adapter for the expansion valve is available in Refrigerant Circuits Adapter Set 1:VAS6338/1 or Refrigerant Circuits Adapter Set 2:VAS6338/50 , the removed expansion valve can also be drilled open (the old expansion valve must be replaced with a new one).

NOTE:

Ignore item -3-.

Make sure when drilling that the flow holes -2 and 4- in the expansion valve -1- are offset to each other.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

If not paying attention while drilling, the sealing surface on the expansion valve -1- could be damaged and then the expansion valve may no longer be used when installing the flushing circuit.

NOTE:

Several components are to be removed from the expansion valve before drilling open.

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

There are different versions of the expansion valves. For version -A-, components -B-, -C- and -D- must be removed. Then separate the regulating element -E- from component -D-. Then drill open the expansion valve in area -F- using a suitable drill bit (6 mm).

For version -G-, components -H-, -I- and -K- must be removed and then drill open area -L- using a suitable drill bit (6 mm).

Clean the drilled open expansion valve of residue from the work (shavings).

Re-install the components -B-, -C- and -D- for version -A-, or component -H- for version -G-.

NOTE:

For vehicles with two evaporators, the circuit to the second evaporator must be disconnected from the circuit of the first evaporator and must be flushed via a separate work procedure. Refer to Heating, Ventilation and Air Conditioning and ADAPTER FOR ASSEMBLING FLUSHING CIRCUIT .