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. XANTIA (X1_, X2_)
2. 406 Break (8E/F)
3. 406 Estate (8E/F)
4. 406 (8B)
5. 406 Saloon (8B)
6. LAGUNA I (B56_, 556_)
7. 406 Coupe (8C)
8. LAGUNA I Grandtour (K56_)
9. LAGUNA I Nevada (K56_)
10. LAGUNA I Estate (K56_)
11. XM (Y4)
12. XM Break (Y4)
13. XM Estate (Y4)
14. 605 (6B)
15. 605 Saloon (6B)
16. XANTIA Break (X1_, X2_)
17. XANTIA Estate (X1_, X2_)
18. ESPACE III (JE0_)
19. ESPACE Mk III (JE0_)
20. SAFRANE II (B54_)
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.