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. C4 II (B7)
2. OUTLANDER II (CW_W)
3. OUTLANDER II (CW_W, ZG, ZH)
4. OUTLANDER II SUV (CW_W)
5. 508 I (8D_)
6. 508 SW I (8E_)
7. SCUDO Van (270_, 272_)
8. SCUDO Bus (270_, 272_)
9. SCUDO MPV (270_, 272_)
10. GRAND C-MAX (DXA/CB7, DXA/CEU)
11. FREELANDER 2 (L359)
12. LR2 (L359)
13. LR2 SUV (L359)
14. C5 III (RD_)
15. C5 III Saloon (RD_)
16. C5 III Break (RW_)
17. MONDEO IV Turnier (BA7)
18. MONDEO IV (BA7)
19. C8 (EA_, EB_)
20. 807 (EB_)
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.