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:
Warning lamp and coolant temperature display
Fig. 194 Coolant temperature display in
instrument cluster: Ⓐ cold; Ⓑ normal; Ⓒ warning
First read and observe the introductory information
and safety warnings In normal driving conditions, the needle will be in the
middle section of the scale. The temperature may also rise when the ...
Removing and installing alternator, vehicles with 2.0 l TSI engine
Special tools and workshop equipment
required
Torque wrench -V.A.G 1331-
Engine bung set -VAS 6122-
Remov ...
Removing and installing fresh air blower -V2-, LHD vehicles
Note
If only the fresh air blower -V2- is defective, remove and
install fresh air blower control unit -J126-
→ Chapter.
Removing
Fresh air blower -V2- is accessible from footwell on front
...
