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 Scenic (JA0/1_)
2. MEGANE I (BA0/1_)
3. MEGANE I Classic (LA0/1_)
4. MEGANE I Coach (DA0/1_)
5. MEGANE I Coupe (DA0/1_)
6. LAGUNA I (B56_, 556_)
7. LAGUNA I Grandtour (K56_)
8. LAGUNA I Nevada (K56_)
9. LAGUNA I Estate (K56_)
10. ESPACE III (JE0_)
11. ESPACE Mk III (JE0_)
12. MEGANE I Grandtour (KA0/1_)
13. MEGANE I Break (KA0/1_)
14. KANGOO (KC0/1_)
15. CLIO II (BB_, CB_)
16. CLIO Mk II (BB_, CB_)
17. LUTECIA II (BB_, CB_)
18. CLIO MIO II (BB_, CB_)
19. KANGOO Express (FC0/1_)
20. KANGOO Rapid (FC0/1_)
21. See more in applications

The operation of the timing belt tensioner

The CAFFARO 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.