A VAICO brand Tensioner Pulley, timing belt is a part of the timing belt drive, which serves to bypass the belt in a certain place or several places and is a freely rotating pulley of small diameter.

The composition of the roller is small: it is the roller mount, the internal rolling bearing with a protective oil seal, and the working body of the roller itself, which is in contact with the belt.

1. CORSA A Hatchback (S83)
2. ASTRA J Sports Tourer (P10)
3. VECTRA A (J89)
4. VECTRA A Hatchback (J89)
5. ASTRA F Hatchback (T92)
6. ASTRA F (T92)
7. OPTIMA F (T92)
8. ASTRA F Estate (T92)
9. CORSA B (S93)
10. VITA B (S93)
11. ASTRA Mk VI (J) Estate (P10)
12. MERIVA Mk II (B) (S10)
13. COMBO Box Body/MPV (71_)
14. GEMINI Saloon (JT)
15. GEMINI (JT)
16. 323 S V (BA)
17. 323 PROTEGE V Saloon (BA)
18. PROTEGE V (BA)
19. 323 S Mk V (BA)
20. FAMILIA V (BA)
21. See more in applications

The principles of the timing belt tensioner work

Excessive tension leads to intensive wear of the timing parts - pulley bearings (water pump, generator, tensioner, etc.), the belt itself, and others. In addition, a tight belt stretches faster and shortens its service life. Too little preload is fraught with more serious problems - slipping of the belt along the toothed pulleys of the camshafts, which leads to a violation of the valve timing and deterioration of the entire engine.

Therefore, a tensioning device is introduced into the timing drive in the form of rollers of one design or another, which, during engine operation, maintain an optimal belt tension.