A DT Spare Parts 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. 164 (164_)
3. 164 Saloon (164_)
4. 168 (164_)
5. TIPO (160_)
6. UNO (146_)
7. DEDRA (835_)
8. DELTA II (836_)
9. DELTA Mk II (836_)
10. TEMPRA (159_)
11. TEMPRA S.W. (159_)
12. TEMPRA SW (159_)
13. DUCATO Bus (230_)
14. PUNTO (176_)
15. PUNTO Convertible (176_)
16. FIORINO Box Body/MPV (146_)
17. 145 (930_)
18. DEDRA SW (835_)
19. 146 (930_)
20. BRAVA (182_)
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.