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. AX (ZA-_)
2. XM (Y3)
3. XM Break (Y3)
4. XM Estate (Y3)
5. 605 (6B)
6. 605 Saloon (6B)
7. 106 I (1A, 1C)
8. XM (Y4)
9. XM Break (Y4)
10. XM Estate (Y4)
11. XANTIA (X1_, X2_)
12. XANTIA Break (X1_, X2_)
13. XANTIA Estate (X1_, X2_)
14. 406 (8B)
15. 406 Saloon (8B)
16. SAXO (S0, S1)
17. CHANSON (S0, S1)
18. 306 Hatchback (7A, 7C, N3, N5)
19. 806 (221)
20. 106 II (1A_, 1C_)
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.