Volkswagen Polo Service & Repair Manual: Tire Sidewall Swelling
| A swelling in the flank of the tire indicates that the
substructure of the carcass has been damaged. |
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| Typical causes for such damage include, for example, driving
over curbs at a sharp angle. |
| Pinching the carcass of a tire this way can damage the
carcass. |
| The substructure of the tire is stretched so far that
individual fibers in the carcass may break. |
| The extent of the damage depends on the speed of impact, the
angle of impact, the air pressure, the axle load and the type of
obstacle. |
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| Evidence of Pinching on the Sidewall of a Tire
-arrows- |
 Note
| Driving over curbs must be avoided! |
| When it cannot be avoided, curbs should be driven over very
slowly at the bluntest possible angle. |
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| Interior View of a Tire with a Punctured Carcass. |
| Due to a severe impact, the carcass was pinched on the rim
flange and is ruptured in the contact patch. |
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| Inside Tire Damage Due to Impact Damage (Double Rupture) |
| Double rupture -arrows- caused
by pinching when driving over a curb. Often not detectable from
outside. |
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Cuts
| Cut Caused by a Sharp-Edged Obstacle
-arrow-. |
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A wear spot is a flat spot on the tread of the tires that
can be caused by extreme braking maneuvers on subsurface such as
asphalt.
...
Driving over hard, pointed objects like nails, screws and
the like can pierce the tire.
This always leads to tire damage.
...
Other materials:
Refrigerant Circuit Pipes and Hoses
Caution
Non-approved tools or materials such as leak sealing
additives can cause damage or malfunctions in the
system.
Only use tools and materials approved by the
manufactu ...
Single Wire Seals, Installing
Note
Single wire seals prevent the penetration of water and dirt
into the contact housing. They are installed, for example, in
the engine compartment and must be reinstalled after a repair.
Single wire seal is crimpe ...
Tyre Pressure Loss Indicator
Fig. 124 In the stowage compartment on
the front passenger side: button for the Tyre Pressure Loss Indicator
First read and observe the introductory information
and safety warnings The Tyre Pressure Loss Indicator uses data
from the ABS sensors and other functions to check the speed of rot ...
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Wear Spots
Foreign Object Damage