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:
Working on refrigerant circuit
Repairs requiring the opening of the refrigerant circuit
must only be carried out by specially trained personnel.
Notes on repairs to vehicles with air conditioning and on
handling refrigerant can be found in ELSA under
→ Air c ...
Wax-based underseal -D 316 000 A1
Designation:
Wax-based underseal -D 316 000 A1-
Issued 01.2008
Product description
Wax underseal -D 316 000 A1- offers excellent long-term
underbody corrosion protection.
...
Removing and installing lower part of sump
Special tools and workshop equipment
required
Flat scraper
Commercially available scraper
Sealant remover
Hand drill with plastic brush attachment
...