A GATES 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. C3 I (FC_, FN_)
2. XSARA PICASSO (N68)
3. 308 I (4A_, 4C_)
4. 408
5. 207 Saloon
6. 207 PASSION Saloon
7. 206 SW (2E/K)
8. 307 (3A/C)
9. 207 (WA_, WC_)
10. 207/207+ (WA_, WC_)
11. 207 SW (WK_)
12. 207 SW Estate (WK_)
13. 307 Saloon
14. XSARA (N1)
15. XSARA Break (N2)
16. XSARA Estate (N2)
17. XSARA Coupe (N0)
18. 206 CC (2D)
19. 206 Hatchback (2A/C)
20. BERLINGO / BERLINGO FIRST MPV (MF_, GJK_, GFK_)
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.