A FAI AutoParts 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. 508 I (8D_)
3. 508 SW I (8E_)
4. 5008 (0U_, 0E_)
5. DS4 (NX_)
6. C4 PICASSO I MPV (UD_)
7. C4 GRAND PICASSO I (UA_)
8. C3 PICASSO (SH_)
9. FIESTA VI (CB1, CCN)
10. FIESTA VI Van
11. FOCUS II Turnier (DA_, FFS, DS)
12. FOCUS II Station Wagon (DA_, FFS, DS)
13. FOCUS II (DA_, HCP, DP)
14. DS5
15. BERLINGO Box Body/MPV (B9)
16. C-MAX (DM2)
17. PARTNER Platform/Chassis
18. 206 Van
19. C3 I (FC_, FN_)
20. FIESTA V (JH_, JD_)
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.