Capacities, AUDI A6 (4B_) 98 And AUDI ALLROAD From My 05

Features of the refrigerant system:

Restrictor
Reservoir
Denso or Zexel / Valeo A/C compressors with A/C clutch -N25-. Refer to [For engine(s) BPY, CETA, CCTA, CDMA, CEPB] Description and Operation (vehicle-specific repair information).

Vehicle model	Production period	Total quantity of oil in refrigerant circuit in cm³	Quantity of refrigerant oil in replacement compressor in cm³	Differing features of this refrigerant circuit
Audi A6/Audi allroad 4-cylinder Gasoline engine except 2.0 l 6-cylinder Gasoline engine except 3, 0 l	As of 04.97 all	250 + 50	250 + 50	See notes below
Audi A6/Audi allroad 4-cylinder Diesel engine 6-cylinder Diesel engine (see notes for Audi allroad)	From 04.97 to 05.01	250 + 50	250 + 50	See notes below
Audi A6 8-cylinder engine (with chain-driven camshaft)	As of 04.97 all	250 + 50	250 + 50	See notes below

NOTE:

The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On A/C compressor replacement, the quantity of oil in the A/C compressor is therefore to be adjusted. Refer to REMOVAL AND INSTALLATION .

The Audi A6 are equipped with different A/C compressors depending on engine and production period.

As of model year 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. For the Audi allroad with 6 cylinder. diesel engine, this gradual change is introduced in model year 2003. Refer to [For engine(s) BPY, CETA, CCTA, CDMA, CEPB] Description and Operation (vehicle-specific repair information).

Beginning the production year 2006, the name of the Zexel A/C compressor was changed from Zexel to Valeo.

Features of the refrigerant system:

Restrictor
Reservoir
Denso A/C compressors with an A/C compressor regulator valve -N280-, refer to [For engine(s) BPY, CETA, CCTA, CDMA, CEPB] Description and Operation (vehicle-specific repair information).

Vehicle model	Production period	Total quantity of oil in refrigerant circuit in cm³	Quantity of refrigerant oil in replacement compressor in cm³	Differing features of this refrigerant circuit
Audi A6 4-cylinder Gasoline engine 2.0 l 6-cylinder Gasoline engine 3.0 l	All	220 + 20	220 + 20	Compressor type 6 SEU 12 or 7 SEU 16 (see notes below)
Audi A6/Audi allroad 4-cylinder Diesel engine 6-cylinder Diesel engine (see notes for Audi allroad)	As of 05.01	245 + 20	245 + 20	Compressor type 6 SEU 12 or 7 SEU 16 (see notes below)
Audi allroad 8-cylinder engine (with chain-driven camshaft)	All	220 + 20	220 + 20	A/C compressor type 7 SEU 17 (see notes below)

NOTE:

The Audi A6 are equipped with different A/C compressors depending on engine and production period.

As of model year 2002, the Audi A6 features compressors with A/C clutch or regulator valve (different oil quantities) depending on the engine. For the Audi allroad with 6 cyl. diesel engine, the change is introduced gradually in model year 2003.

The replacement A/C compressor with an A/C compressor regulator valve -N280- can have different oil capacities; pay close attention to the exact part number. Refer to [For engine(s) BPY, CETA, CCTA, CDMA, CEPB] Removal and Installation (vehicle-specific repair information).

The reason for the different oil capacities inside the A/C compressor is due to the design of the A/C compressor (with or with an oil separator on the high pressure connection) or to the design of the refrigerant circuit if the A/C compressors are have the identical design. Pay attention to the different capacities. Too much oil in the circuit leads to higher pressures and reduces cooling performance of the system. Too little oil may lead to lubrication problems in the compressor.

A data plate may be attached to the A/C compressor by the manufacturer, indicating the part number and refrigerant oil quantity.