Empty Refrigerant Circuit

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.

-- Remove malfunctioning component.

-- Remove the A/C compressor.* Refer to A/C COMPRESSOR, REMOVING AND INSTALLING .

-- Remove the oil drain plug -B- / -D- from the A/C compressor -A-.*

Courtesy of VOLKSWAGEN GROUP OF AMERICA, INC.

NOTE:

The versions of the oil drain plug -B- / -D- and the seal -C- / -E- are different (depending on the manufacturer of the A/C compressor). Refer to A/C COMPRESSOR /A/C COMPRESSOR, INSTALLATION INFORMATION (vehicle-specific Service Information).

When installing the oil drain plug -B- / -D-, note the tightening specification (dependent on the A/C compressor manufacturer and the version of the oil drain plug). For example, a seal is installed on the oil drain plug for a "Denso" and "Delphi" A/C compressor. Refer to A/C COMPRESSOR, INSTALLATION INFORMATION / SYSTEM OVERVIEW - REFRIGERANT CIRCUIT . (tightening specification currently 30 Nm on a "Denso" and 15 Nm on a "Delphi" A/C compressor). On "Sanden" or "Zexel- / Valeo" A/C compressors an oil drain plug or a seal is installed depending on the version on the oil drain plug (tightening specification currently 10 Nm).

On Denso A/C compressors for example a seal -E- is installed on the oil drain plug -D-. For replacement. Refer to A/C COMPRESSOR (vehicle-specific Service Information) and the Parts Information.

On Sanden A/C compressors for example a seal -C- is installed on the oil drain plug -B-. For the replacement refer to A/C COMPRESSOR (vehicle-specific Service Information) and the Parts Information.

If the seals (seal or O-ring) that are installed on the oil drain plug are not available as a replacement part, the removed seals may be used as an exception (check for damage before installing). If the removed seal is damaged or deformed if necessary replace with a commercially available component.

After charging the refrigerant circuit check the installed oil drain plug for leaks for example using an electronic leak detector.

To accelerate drainage of refrigerant oil, turn the A/C compressor via the belt pulley or the A/C clutch plate, for example.

NOTE:

To speed up refrigerant oil drainage, turn the A/C compressor by hand via the ribbed belt pulley or the A/C clutch plate.

Pour the used refrigerator oil out of the A/C compressor. Refer to Environment Protection, Waste Management, Current, Methods of Disposal, Disposing of Used Refrigerant Oil.

Then fill the A/C compressor with an amount of new refrigerant oil that corresponds to the amount of refrigerant oil in original A/C compressor part. Refer to MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2011) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2012) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2013) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2014) .

Use different refrigerant oils and quantities for the various A/C compressors. Refer to MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2011) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2012) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2013) / MAINTENANCE (FLUID CAPACITY TABLES), DIAGNOSIS (2014) .

To ensure the A/C compressor is lubricated at start-up, at least 80 cm³ of refrigerant oil must be poured into the A/C compressor. The remainder can be added to the new reservoir or receiver/dryer. Refer to the appropriate service information. .

If dirt has penetrated into the A/C compressor with the refrigerant circuit open (for example after an accident), A/C compressor is to be replaced.

Flush the refrigerant circuit with compressed air and remove moisture with nitrogen. Refer to REFRIGERANT CIRCUIT, CLEANING WITH COMPRESSED AIR AND NITROGEN .

-- Replace the receiver/dryer or reservoir and restrictor.

-- Assemble, evacuate and recharge refrigerant circuit.