Capacities for Audi A6 (4B_) from 1998 and Audi Allroad
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.
Characteristics of refrigerant circuit:
- Restrictor
- Reservoir
- "Denso" or "Zexel" compressor with A/C Clutch N25 → 87 - Air conditioning and → Electronic Parts Catalog ETKA
| Vehicle model | Production period | Total quantity of oil in refrigerant circuit in cm 3 | Quantity of refrigerant oil in replacement compressor in cm 3 | Differing characteristics of this refrigerant circuit |
| Audi A6/Audi Allroad 4-cyl. gasoline engine except 2.0 l 6-cyl. gasoline engine except 3.0 l | 04.97 on All | 250 + 50 | 250 + 50 | Refer to notes below |
| Audi A6/Audi Allroad 4-cyl. diesel engine 6-cyl. diesel engine (see notes for Audi Allroad) | From 04.97 to 05.01 | 250 + 50 | 250 + 50 | Refer to notes below |
| Audi A6 8-cyl. engine (with toothed belt camshaft drive) | 04.97 on All | 250 + 50 | 250 + 50 | Refer to notes below |
NOTE:
- The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted → Refrigerant Circuit Components, Replacing .
- The Audi A6 is equipped with different compressors depending on the 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. This change is being introduced gradually for the Audi Allroad with 6-cyl. diesel engine in Model Year 2003 → 87 - Air conditioning and → Electronic Parts Catalog ETKA.
Characteristics of refrigerant circuit:
- Restrictor
- Reservoir
- "Denso" compressor with A/C Compressor Regulator Valve N280 → 87 - Air conditioning and → Electronic Parts Catalog ETKA
| Vehicle model | Production period | Total quantity of oil in refrigerant circuit in cm 3 | Quantity of refrigerant oil in replacement compressor in cm 3 | Differing characteristics of this refrigerant circuit |
| Audi A6 4-cyl. gasoline engine 2.0 l 6-cyl. gasoline engine 3.0 l | All | 220 + 20 | 220 + 20 | Compressor type 6 SEU 12 or 7 SEU 16 (refer to notes below) |
| Audi A6/Audi Allroad 4-cyl. diesel engine 6-cyl. diesel engine (see notes for Audi Allroad) | 05.01 on | 245 + 20 | 245 + 20 | Compressor type 6 SEU 12 or 7 SEU 16 (refer to notes below) |
| Audi Allroad 8-cyl. engine (with chain-driven camshaft) | All | 220 + 20 | 220 + 20 | Compressor type 7 SEU 17 (refer to notes below) |
NOTE:
- The replacement compressor contains the full quantity of oil intended for the refrigerant circuit. On replacement, the quantity of oil in the compressor is therefore to be adjusted → Refrigerant Circuit Components, Replacing .
- The Audi A6 is equipped with different compressors depending on the 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. This change is being introduced gradually for the Audi Allroad with 6-cyl. diesel engine in Model Year 2003.
- As the replacement compressor with A/C Compressor Regulator Valve N280 is supplied with different oil capacities, the exact part no. must be noted → 87 - Air conditioning and → Electronic Parts Catalog ETKA.
- The reason for the different oil quantities in the compressor for an otherwise identical refrigerant circuit is the design of the actual compressor. Attention is to be paid to these oil quantities. Too much oil in the circuit results in higher pressures and reduced system cooling output; insufficient oil can cause lubrication problems in the compressor.
- The compressor may have been installed at the factory with a rating plate indicating the part number and the quantity of refrigerant oil in the compressor.