Volkswagen Golf Service & Repair Manual: Detecting leaks
External damage can cause leaks in the refrigerant circuit. Because a small leak will involve only small quantities of refrigerant, leaks should be checked for using an electronic leak detector or by introducing a leak detection additive to the refrigerant circuit. Electronic leak detectors can detect leakage rates of less than 5 grams loss of refrigerant per year. The leak detector should be specific to the composition of the particular refrigerant in use. For example, a leak detector for R12 refrigerant is not appropriate for R134a refrigerant because R134a refrigerant has no chlorine atoms to which the lead detector responds.)
Charge factor
There must be space both for liquid and vapour in a
container. As the temperature rises, the liquid expands. The
space occupied by the vapour becomes smaller. Eventua ...
Refrigerant machine oil
Refrigerant machine oil is miscible (approx. 20%–40%
depending on the type of air conditioner compressor and the
quantity of refrigerant) in the refrigerant. I ...
Other materials:
Undulations
Radial depressions are slight concavities in the tyre
sidewall.
They run from the bead towards the shoulder of the tyre.
These parts appear in the figure
→ Fig..
The cause is the accumulation of material ...
2-pack plastic adhesion surfacer
Designation:
2-pack primer surfacer for plastics -LKF 696 009 A2-, white
2-pack primer surfacer for plastics -LKF 696 040 A2-, black
Issued 08.2013
Product desc ...
Vehicle diagnostic, testing and information systems
WARNING
During testing or measuring operations using a
vehicle diagnostic information system there is a risk of
serious or even fatal injury!
If the vehicle diagnost ...