Poly V-belt and toothed drive belts (VW Sharan 1)

The timing drive components are shown in Fig. 414. To access the timing drive components, remove the power steering pump V-belt and the alternator drive poly V-belt. The work is described in the corresponding section.

The camshaft is driven by a toothed belt that passes through pulleys located on the camshaft, crankshaft and fuel injection pump. The intermediate shaft is driven by a pulley without toothed engagement.

Once again, we draw your attention to the fact that when working with the valve timing mechanism, it is necessary to have a special tool, for example, for adjusting the high-pressure pump drive and the camshaft, without which the adjustment should not be made. Since the operation of the valves depends on the correct adjustment of the camshaft drive, then incorrect adjustment of the camshaft drive can be very expensive. Always remember that the belt can jump one tooth and this can lead to serious damage to the engine, since the valves will open and close at the wrong time, which will lead to serious damage to the pistons. For this reason, the toothed belt should be changed every 100,000 km, since a torn drive can cause similar damage.



A special tool is also required to adjust the tension of the toothed belt. If necessary, you can also adjust the belt tension by eye, but we recommend that you check the belt tension at a service station as soon as possible after such adjustment. Checking the belt tension does not take much time.

The following work should only be carried out if you have the appropriate special tool at your disposal. Otherwise, contact a service station.

Provided the belt is not damaged, it has a service life of up to 100,000 km.

The belt tension is adjusted by means of a tension roller with an adjusting eccentric.

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