The timing belt tensioner is a load-bearing pulley located on an adjustable axle. Its main function is belt tension; additional functions are to damp drive vibrations and increase the angle of the camshaft pulley wrap.

1. VECTRA A (J89)
2. VECTRA A Hatchback (J89)
3. ASTRA F Hatchback (T92)
4. ASTRA F (T92)
5. OPTIMA F (T92)
6. ASTRA F Estate (T92)
7. COMBO Box Body/MPV (71_)
8. CORSA B (S93)
9. VITA B (S93)
10. CORSA B Hatchback Van (S93)
11. See more in applications

The operation of the timing belt tensioner

The ASHIKA brand Tensioner, timing belt is a bearing with a pulley on the outer cage. Depending on the design, the tensioning mechanism can be made in the form of an eccentric pressed into the inner bearing race, or placed on a separate bracket. The bearing cage is packed with grease and covered with a lip. You can order an automatic tensioner, it is a little more complicated, but the roller itself has no fundamental differences.

Timing belt tension is designed for a specific force and must be consistent. Selecting a timing belt tensioner pulley that is too loose can cause the belt to slip through the timing belt teeth. This is unacceptable, since it will lead to a shift in the phases of the valve operation relative to the movement of the pistons.