VW Golf Mk7 manualsGolf Mk7 / manual

Volkswagen Golf Mk7 Service & Repair Manual: O-ring

These O-rings seal joints between individual Volkswagen Golf Mk7 refrigerant circuit components — use only seals resistant to R134a and its associated refrigerant oils.

These O-rings seal the joints between the individual components of the refrigerant circuit.
Use only seals that are resistant to refrigerant R134a and its associated refrigerant oils. This is assured by using genuine replacement parts.
→ Parts catalogue
O-ring:
Never reuse seals!
Check that diameters -a- and -b- are correct.
Before fitting a seal, coat it lightly with refrigerant oil.
  Note
The colour coding of O-rings for R134a refrigerant circuits has been discontinued. Coloured and black O-rings are used.
→ Rep. gr.87
→ Parts catalogue
 

O-ring

    Questions & answers

    O-ring — Volkswagen Golf Mk7

    What do O-rings do in the Golf Mk7 AC circuit?
    Seal the joints between components. Must be R134a-compatible, renewed at every opening, and moistened with refrigerant oil before fitting.
    Expansion valve
    The expansion valve atomises incoming refrigerant and regulates the flow so that, depending on the heat transport, the vapour does not become a gas until it reaches t ...

    Pipes and hoses in refrigerant circuit
    The mixture of refrigerant oil and refrigerant R134a attacks certain metals (e.g. copper) and alloys and dissolves certain hose materials. Therefore, always use genui ...

    Other materials: