The timing belt tensioner is a load-bearing pulley located on an adjustable axle. Its main function is belt tension; additional functions are to damp drive vibrations and increase the angle of the camshaft pulley wrap.

1. FIESTA IV (JA_, JB_)
2. FIESTA Mk IV (JA_, JB_)
3. 121 III (JASM, JBSM)
4. SOHO III (JASM, JBSM)
5. PUMA (EC_)
6. FOCUS (DAW, DBW)
7. FOCUS Saloon (DFW)
8. FOCUS Turnier (DNW)
9. FOCUS Clipper (DNW)
10. FIESTA Saloon
11. CLASSIC Saloon
12. IKON Saloon
13. FIESTA MOVE Saloon
14. FIESTA V (JH_, JD_)
15. IKON V (JH_, JD_)
16. FUSION (JU_)
17. 2 (DY)
18. DEMIO (DY)
19. FOCUS C-MAX (DM2)
20. FOCUS II (DA_, HCP, DP)
21. See more in applications

The operation of the timing belt tensioner

The FEBI BILSTEIN brand Tensioner, timing belt is a bearing with a pulley on the outer cage. Depending on the design, the tensioning mechanism can be made in the form of an eccentric pressed into the inner bearing race, or placed on a separate bracket. The bearing cage is packed with grease and covered with a lip. You can order an automatic tensioner, it is a little more complicated, but the roller itself has no fundamental differences.

Timing belt tension is designed for a specific force and must be consistent. Selecting a timing belt tensioner pulley that is too loose can cause the belt to slip through the timing belt teeth. This is unacceptable, since it will lead to a shift in the phases of the valve operation relative to the movement of the pistons.