Audi A4 2001 - Vehicle Mod-Production Period Total Quantity of Oil in Refrig-Quantity of Refrigerant Oil in Replace- el Erant Circuit in CM 3 Ment Compressor in CM

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Note
♦ The replacement compressor contains the full quantity of oil
intended for the refrigerant circuit. On A/C compressor re‐
placement, the quantity of oil in the A/C compressor is there‐
fore to be adjusted. Refer to
⇒ “5 Removal and Installation“, page 191 .
♦ The Audi A6 are equipped with different A/C compressors de‐
pending 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) depend‐
ing 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 ⇒ Heating,
Ventilation and Air Conditioning; Rep. Gr. 87 ; Removal and
Installation (vehicle-specific repair manual) and to the Elec‐
tronic Parts Catalog.
♦ The reason for the different oil capacities inside the A/C com‐
pressor 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 ca‐
pacities. 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.
3.4.12 Capacities, Audi A6 (4F_), from MY 05
Note
Applies also to the Audi S6 and the Audi RS 6.
Features of the refrigerant system:
• Restrictor
• Reservoir
• Denso A/C compressors with an A/C compressor regulator
valve -N280- , refer to ⇒ Heating, Ventilation and Air Condi‐
tioning; Rep. Gr. 87 ; Description and Operation (vehicle-
specific repair manual) and to the Electronic Parts Catalog.
Vehicle mod‐
el
Production period Total quantity of oil in refrig‐
erant circuit in cm
3
Quantity of refrigerant oil in replace‐
ment compressor in cm
3
Audi A6 / S6 As of 04.04
130
+
/
-
10 130
+
/
-
10
Audi RS 6 As of 05.08
130
+
/
-
10
Depending on the version of the A/C
compressor (see note below)
♦
130
+
/
-
10
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
132 Rep. Gr.00 - General, Technical Data