Vehicle
model
Pro‐
duction
period
Total quanti‐
ty of oil in re‐
frigerant cir‐
cuit in cm
3
Quantity of
refrigerant oil
in replace‐
ment com‐
pressor in
cm
3
Differing fea‐
tures of this
refrigerant
circuit
♦ Vehi‐
cle
with
one
evap‐
orator
145
+
/
-
15
♦
150
+
/
-
10
(A/C
compres‐
sor for a
8-cylinder
vehicle)
♦
140
+
/
-
10
(A/C
compres‐
sor for a
6-cylinder
vehicle)
• One evap‐
orator
♦ Vehi‐
cle
with
two
evap‐
ora‐
tors
245
+
/
-
15
• Two evap‐
orators
(see notes
below)
Note
♦
The replacement compressor is already filled with a specific
refrigerant oil quantity (currently 140 or 150
+
/ - 10 cm
3
, de‐
pending on the compressor), this refrigerant oil quantity cor‐
responds to the oil quantity designated for this refrigerant
circuit on vehicles with one evaporator. On vehicles with two
evaporators, a greater refrigerant oil quantity is required in the
refrigerant circuit (currently an additional 100 cm
3
) because of
the longer refrigerant lines and the second evaporator. If the
compressor is replaced after cleaning the refrigerant circuit,
this refrigerant oil quantity must therefore be added to the re‐
frigerant circuit (e.g. into opened lines or component connec‐
tions) in vehicles with two evaporators. If compressor is
replaced without having to clean the refrigerant circuit, the re‐
frigerant oil quantity in the new compressor to be installed
must be adjusted to the oil quantity poured out of the old com‐
pressor. Refer to ⇒ “5 Removal and Installation“, page 191 .
♦
These A/C compressors are available as replacement parts
with different oil fill capacities, therefore note capacity on the
A/C compressor and the exact part number. Refer 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.
♦
Too much oil in the circuit leads to higher pressures and re‐
duces cooling performance of the A/C system. Too little oil
may lead to lubrication problems in the compressor, therefore
note the specified refrigerant oil quantities.
♦
A data plate may be attached to the A/C compressor by the
manufacturer, indicating the part number and refrigerant oil
quantity.
3.4.19 Capacities, Audi R8 (42_) from MY 08
Features of the refrigerant system:
Audi 100 1991 ➤ , Audi 80 1992 ➤ , Audi A1 2011 ➤ , Audi A2 2001 ➤ , A ...
Refrigerant R134a Servicing - Edition 01.2011
3. Specifications 139
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