A DAYCO 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. 155 (167_)
2. RITMO (138_)
3. STRADA (138_)
4. TIPO (160_)
5. REGATA (138_)
6. REGATA Saloon (138_)
7. UNO (146_)
8. DELTA I (831_)
9. DELTA � (831_)
10. THEMA (834_)
11. THEMA SW (834_)
12. DELTA II (836_)
13. DELTA Mk II (836_)
14. COUPE (175_)
15. DEDRA (835_)
16. DEDRA SW (835_)
17. KAPPA (838_)
18. RITMO Convertible (138_)
19. STRADA Convertible (138_)
20. CROMA (154_)
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.