A SNR 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. 5008 (0U_, 0E_)
3. C30 (533)
4. C4 PICASSO I MPV (UD_)
5. C4 GRAND PICASSO I (UA_)
6. S40 II (544)
7. S40 II Saloon (544)
8. C3 PICASSO (SH_)
9. BERLINGO MULTISPACE (B9)
10. S60 II (134)
11. V60 I (155, 157)
12. S80 II (124)
13. S80 II Saloon (124)
14. V70 III (135)
15. PARTNER TEPEE
16. GRAND RAID
17. PARTNER Box Body/MPV
18. GRAND RAID Box Body/MPV
19. BERLINGO Box Body/MPV (B9)
20. 308 SW I (4E_, 4H_)
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.