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. MODUS / GRAND MODUS (F/JP0_)
2. LOGAN (LS_)
3. WIND (E4M_)
4. TWINGO II (CN0_)
5. THALIA II (LU_)
6. SYMBOL II (LU_)
7. CLIO III (BR0/1, CR0/1)
8. EURO CLIO III (BR0/1, CR0/1)
9. CLIO CAMPUS III (BR0/1, CR0/1)
10. LUTECIA III (BR0/1, CR0/1)
11. CLIO III Grandtour (KR0/1_)
12. CLIO III Sportour (KR0/1_)
13. SANDERO
14. TWINGO I (C06_)
15. CLIO II (BB_, CB_)
16. CLIO Mk II (BB_, CB_)
17. LUTECIA II (BB_, CB_)
18. CLIO MIO II (BB_, CB_)
19. KANGOO (KC0/1_)
20. KANGOO Express (FC0/1_)
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.