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:
Installing roof reinforcement to body, estate with sliding sunroof
Special tools and workshop equipment
required
Electric cutter -V.A.G 1561A
Scraping blade -V.A.G 1561/20
...
Removing and installing relay and fuse carrier behind dash panel, LHD
vehicles
Removing
–
With ignition switched off, disconnect earth cable from
battery
→ Chapter.
–
Remove dash panel
→ General body repairs, interior; Rep. gr.70.
...
Removing and installing dust and pollen filter, RHD vehicles
Special tools and workshop equipment
required
Commercially available vacuum cleaner
Cover plate -T10532-
Removal wedge -3409-
...