VW Golf manuals

Volkswagen Golf Service & Repair Manual: Undulations

Radial depressions are slight concavities in the tyre sidewall.
They run from the bead towards the shoulder of the tyre. These parts appear in the figure → Fig..
The cause is the accumulation of material at the joints of the tyre components.
Undulations have no effect on:
Safety,
Service life,
Handling or
Other characteristics of the tyre.
Undulations are visible to varying extents. It is not necessary to inspect the tyre or remove it from the rim.
What causes undulations?
Modern steel belted tyres are constructed with single-ply side walls to save weight.
The sidewall components consist of long strips before they are joined together to form a tyre. They must overlap at the joints. Consequently, slight irregularities or waves are created in the area of the overlapping parts. The overlaps are easier to see from the outside due to the single-ply construction.
   

Saw-tooth wear

Flat spots caused by storage or handling
What is a flat spot? The terms flat area and flats are also used for the term flat spot. Flat spots caused by storage or handl ...

Flat spots caused by hard braking
  This type of flat spots may be caused by hard braking on a rough surface such as a tarmac road. During this type of braking manoeuv ...

Other materials:

Overview of fitting locations - front control motors, Climatronic, RHD vehicles
1 -  Control motor for fresh air and air recirculation flap and air flow flap -V425- With potentiometer for fresh air/recirculated air and air flow flap control motor -G644-. Checking: with vehicle diagnostic tester ...

Checking inner constant velocity joint
The joint is to be dismantled to renew the grease if it is heavily soiled, or to check the running surfaces of the balls for wear and damage.   Note The ball hub and joint body are paired. Mark position in relation to each o ...

Knee airbags
Fig. 75 On the driver side: location of the knee airbag Fig. 76 Deployment zone of the knee airbag First read and observe the introductory information and safety warnings The knee airbag on the driver side is located in the lower part of the dash panel  . The airbag location is identi ...

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