Volkswagen Golf Service & Repair Manual: Engine lubrication

Valve dimensions

  Note     Inlet and exhaust valves must not be reworked. Only lapping-in is permitted.   ...

Sump, oil pump

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Other materials:

Detecting leaks in refrigerant circuit using leak detecting system -VAS 6196- or leak detecting system -VAS 6201- or a later model
  Note Small leaks can be detected with, for example, an UV leak detector additive. –  Evacuate refrigerant circuit using an air conditioner service station → Chapter.   Note ...

Assembly overview - track rod, multi-link suspension, four-wheel drive
1 -  Subframe 2 -  Bolt Renew after removing 70 Nm +180° 3 -  Wheel bearing housing 4 -  Track rod Removing and installing →  ...

Effects on metal
In its pure state, refrigerant R134a is chemically stable and does not attack iron or aluminium. However, impurities such as chlorine compounds in the refrigerant do attack certain metals and plastics. This can lead to blockages, leaks a ...