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. MEGANE III Grandtour (KZ0/1)
2. GRAN TOUR III Grandtour (KZ0/1)
3. MEGANE III Hatchback (BZ0/1_, B3_)
4. KANGOO Express (FC0/1_)
5. KANGOO Rapid (FC0/1_)
6. MODUS / GRAND MODUS (F/JP0_)
7. TWINGO II (CN0_)
8. DUSTER (HS_)
9. CUBE (Z12)
10. SCENIC III (JZ0/1_)
11. GRAND SCENIC III (JZ0/1_)
12. SANDERO
13. LOGAN (LS_)
14. LOGAN MCV (KS_)
15. LOGAN EXPRESS (FS_)
16. KANGOO BE BOP (KW0/1_)
17. THALIA II (LU_)
18. SYMBOL II (LU_)
19. NV200 / EVALIA Bus
20. EVALIA Bus
21. See more in applications

The operation of the timing belt tensioner

The JAPKO 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.