Volkswagen Golf Service & Repair Manual: O-ring
| These O-rings seal the joints between the individual
components of the refrigerant circuit. |
| Use only seals that are resistant to refrigerant R134a and
its associated refrigerant oils. This is assured by using
genuine replacement parts. |
| Check that diameters -a- and
-b- are correct. |
| Before fitting a seal, coat it lightly with refrigerant oil. |
 Note
| The colour coding of O-rings for R134a refrigerant circuits
has been discontinued. Coloured and black O-rings are used. |
|
|
|
The expansion valve atomises incoming refrigerant and
regulates the flow so that, depending on the heat transport, the
vapour does not become a gas until it reaches t ...
The mixture of refrigerant oil and refrigerant R134a attacks
certain metals (e.g. copper) and alloys and dissolves certain
hose materials. Therefore, always use genui ...
Other materials:
Assembly overview - speed sensor on front axle
1 -
ABS speed sensor
Clean inside surface of hole before inserting sensor
Coat inside surface with high-temperature paste -G 052 112 A3-
Removing and installing
→ Chapter
2 -
Bolt
...
Notes concerning odours in air conditioned vehicles
If the evaporator emits unpleasant odours, clean the
evaporator.
Volkswagen has tested and approved the ultrasound A/C
cleaner -VAS 6189A- as well as the suction feed spray-gun -V.A.G
1538- with the appropriate spray probe.
...
Effects on metal
In its pure state, refrigerant R134a is chemically stable
and does not attack iron or aluminium.
However, impurities such as chlorine compounds in the
refrigerant do attack certain metals and plastics. This can lead
to blockages, leaks a ...
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Expansion valve
Pipes and hoses in refrigerant circuit