Volkswagen Golf Service & Repair Manual: Wheel change, installation requirements
| Warming cold tyres to minimum installation temperature |
Note
| This instruction also applies to ultra-high performance
tyres (height/width ratio smaller than/same as 45 % and speed
symbol greater than/same as V). |
WARNING
| The minimum installation temperature of a tyre
should be between 15 °C and 30 °C in the core of the
tyre. |
|
| To install tyres without damage, it is especially important
to warm the upper part of the sidewall and the inside of the
upper bead to at least 15 °C. |
| This internal temperature is referred to as the core
temperature. |
| Rubber is a poor conductor of heat. Therefore, a cold tyre
must be left in an area with the correct temperature for a
sufficiently long period so the inner rubber layers can warm up
to at least 15 °C. |
| The surface temperature of the tyre during the warming up
phase is no indication of the internal temperature of the tyre. |
| To enable cold tyres to absorb heat from the ambient air as
quickly as possible, they should not be stacked on top of one
another. Instead, the tyres should be stored individually in
order to allow the warm air to “circulate” around them
effectively. |
| Tyres must never be placed in front of a radiator or hot air
blower for warming, since this can very quickly lead to critical
surface temperatures. |
| Heating the tyres without damage can only be achieved by
heating with warm water or warm air (max. 50 °C)! |
| If cold tyres (below 0 °C) are transferred to a warm
environment (above 0 °C), a layer of condensation immediately
forms on the surface of the tyre. This layer of condensation
indicates that the tyre is intensively absorbing heat from its
environment through the process of water vapour in the air
condensing out on the tyre surface. |
| Once the layer of frost has thawed, condensate water forms.
The condensation should be dried with a cloth so that the
further warming process is not delayed due to a temperature drop
caused by evaporation. |
| Tyres with a temperature of above 0 °C must be kept at least
at 19 °C for at least 2 hours. |
| Tyres with a temperature of below 0 °C must be kept at least
at 19 °C for at least 2.5 hours. |
| If possible, tyres should be stored in the workshop 1 day
before they are fitted (order preparation). |
| Store on an insulated base, pallet or on a similar surface
raised from the floor. |
| Position the tyres individually to allow the warm air to
“circulate” around them effectively. |
| Never heat with a radiator or hot air blower! |
|
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Applies to alloy and steel wheels
When changing a wheel, wheel centring seat should be waxed
using wax spray to prevent corrosion between wheel centr ...
WARNING
Perform the checks and follow the instructions
listed below. This is important to ensure that the wheel
bo ...
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Wheel change, protecting wheel centring seat against corrosion
Wheel change, installation instructions for wheel change