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:
Release tools for contacts
The various release tools serve as a means of detaching the
different contacts from the contact housings without damage.
A selection of release tools is included in wiring harness
repair set -VAS 1978- and wiring harness repair set -VAS 1978A- ...
An economic driving style
First read and observe the introductory information
and safety warnings Changing gear earlier
In principle, the highest gear is always the most economical gear. A rule of
thumb for most vehicles: at a speed of 30 km/h (18 mph) drive in 3rd gear, at 40
km/h (25 mph) in 4th gear and at 50 km/ ...
Removing and installing gas strut
Removing
Note
The rear lid must be supported when a gas strut is removed. One gas
strut alone cannot support an open rear lid.
–
Open rear lid and brace it open.
...