VW Golf manuals

Volkswagen Golf Service & Repair Manual: Vapour pressure

In an enclosed container that is not completely full, refrigerant evaporates as vapour at the surface in a quantity sufficient to form an equilibrium between vapour and liquid. This equilibrium develops under pressure and is often called vapour pressure. The vapour pressure is temperature-dependant → Chapter.
   
Physical properties of R134a
Because the vapour pressure curves of R134a and other refrigerants are in part very similar, unique identification on the basis of pressure alone is not possible.
The air conditioner compressor used for R134a is lubricated with special synthetic refrigerator oils, such as PAG oils (polyalkylene glycol oils).
Trade names and designations
Refrigerant R134a is currently available under the following trade designations: H-FKW 134a SUVA 134a ...

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 th ...

Other materials:

Measuring axial clearance of crankshaft
Risk of damage to bearing pedestals when the crankshaft is removed.If the bolts of the crankshaft bearing cap are loosened, the bearing pedestals of the cylinder block will be deformed, and damage to the bearings will result.Never remove the crankshaft. Special tools ...

Assembly overview - steering wheel
1 -  Steering column Removing and installing → Chapter The centre punch marks -arrows- on the steering wheel and the steering column must align when reinstalling. Some steering columns leave the factory with no centre ...

Locking and unlocking the vehicle from the outside
Fig. 27 Buttons on the vehicle key Fig. 28 Vehicle key with alarm button First read and observe the introductory information and safety warnings  Function Buttons to be used on the vehicle key   or   Unlocking the vehicle. Press the  b ...

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