A OPTIMAL 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. UNO (146_)
2. PUNTO (176_)
3. FIORINO Box Body/MPV (146_)
4. PALIO Weekend (178_, 173_, 373_, 374_)
5. WEEKEND Weekend (178_, 173_, 373_, 374_)
6. PALIO WEEKEND / WEEKEND Weekend (178_, 173_, 373_, 374_)
7. PALIO WEEKEND Weekend (178_, 173_, 373_, 374_)
8. PUNTO Van (176_)
9. DUNA (146_)
10. PREMIO (146_)
11. DUNA Weekend (146_)
12. PREMIO Weekend (146_)
13. PREMIO / ELBA Weekend (146_)
14. STRADA Pickup (178_)
15. FIORINO Pick up (146_)
16. ELBA (146_)
17. ELBA CSL (146_)
18. PALIO (178_)
19. SIENA (178_, 172_)
20. ALBEA (178_, 172_)
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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.