VW Golf manuals

Volkswagen Golf Service & Repair Manual: Causes of vibration

Vibration can have a number of different causes. Vibration can also be caused by tyre wear. Tyre wear caused by driving is not always evenly spread across the entire running surface of the tyre. This causes slight imbalances which affect the smooth running of a wheel which was previously exactly balanced.
Minor imbalances will not be felt at the steering wheel, but that does not mean that they are not there. They increase wear on the tyre and thus reduce the tyre service life.
Recommendation
To ensure
optimal safety,
smoothest possible running and
even wear
throughout a tyre's service life, we recommend having the wheels and tyres balanced at least twice during the tyre's service life.
   
Vibration due to wheels/tyres - causes and rectification
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Conducting a road test before balancing wheels
If a customer brings a vehicle to the workshop complaining about “vibration”, a road test is essential prior to balancing the wheels. ...

Other materials:

Refrigerant circuit components
  Caution Non-authorised tools or materials (e.g. leak inhibitor additive) may cause damage or adversely influence the system. Only tools and materials approved by the manufac ...

Safety precautions for working on vehicles with auxiliary/supplementary heater
Danger of fire and explosion from auxiliary/supplementary heater In fire and explosion-endangered areas a spark or the high temperature of the auxiliary/supplementary heater can cause a fire or an explosion. Burn injuries are also possible. –  Swit ...

Leak detection in refrigerant circuit using compressed air or nitrogen
  Note A leak in the refrigerant circuit can be detected, for example, by pressurising the circuit to a maximum of 15 bar using cleaned and dried compressed air or nitrogen → Chapter. If the leak is large, the leakage point ...

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