A FEBI BILSTEIN 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. 508 I (8D_)
2. 508 SW I (8E_)
3. C5 III (RD_)
4. C5 III Saloon (RD_)
5. C5 III Break (RW_)
6. PHEDRA (179_)
7. S-MAX (WA6)
8. MONDEO IV (BA7)
9. MONDEO IV Turnier (BA7)
10. ULYSSE (179_)
11. RANGE ROVER EVOQUE (L538)
12. RANGE ROVER EVOQUE SUV (L538)
13. GALAXY (WA6)
14. 607 (9D, 9U)
15. 607 Saloon (9D, 9U)
16. 407 (6D_)
17. 407 Saloon (6D_)
18. 407 SW (6E_)
19. C5 II (RC_)
20. C5 II Break (RE_)
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.