Volkswagen Golf Service & Repair Manual: Safety precautions when handling refrigerants
| Risk of freezing injury caused by refrigerant |
| When working on the air conditioning system, there is a risk of
highly pressurised refrigerant escaping from the system. There is a risk
of injury to the skin and parts of the body due to freezing. |
| – |
Always wear safety gloves. |
| – |
Always wear safety goggles. |
| – |
Extract refrigerant, and open the refrigerant circuit immediately
afterwards. |
| – |
If more than 10 minutes passed since the refrigerant has been
extracted, do not open the refrigerant circuit prior to extracting
refrigerant anew. Due to re-evaporation, pressure will be built up in
the refrigerant circuit. |
| Risk of damage to refrigerant lines |
| There is a risk of damage to the refrigerant lines due to rupture of
the inner foil. |
| – |
Never bend refrigerant lines to a radius less then 100 mm
(r < 100 mm). |
Risk of injury due to unexpected engine start
In vehicles with activated Start/Stop system, the engine may start
up unexpectedly. The status of the Start/Stop system is indicat ...
Other materials:
Valve dimensions
Note
Inlet and exhaust valves must not be reworked. Only
lapping-in is permitted.
Dimension
Inlet
valve
Exhaust
valve
Diameter a
...
Cleaning the engine compartment
First read and observe the introductory information
and safety warnings The engine compartment of any motor vehicle is a hazardous
area .
The engine compartment should be cleaned by a qualified workshop. Corrosion protection
could be removed and electrical components damaged if the com ...
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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Safety precautions for working on vehicles with start-stop system