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. AVENSIS Liftback (_T22_)
2. AVENSIS (_T22_)
3. AVENSIS Estate (_T22_)
4. COROLLA Compact (_E11_)
5. COROLLA Liftback (_E11_)
6. COROLLA Estate (_E11_)
7. PREVIA (_R3_)
8. TARAGO (_R3_)
9. PREVIA / ESTIMA (_R3_)
10. ESTIMA (_R3_)
11. AVENSIS VERSO (_M2_)
12. VERSO SPORTVAN (_M2_)
13. IPSUM (_M2_)
14. PICNIC (_M2_)
15. COROLLA (_E11_)
16. COROLLA Saloon (_E11_)
17. RAV 4 II (_A2_)
18. RAV 4 Mk II (_A2_)
19. RAV 4 II SUV (_A2_)
20. COROLLA (_E12_)
21. See more in applications

The operation of the timing belt tensioner

The JAPANPARTS 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.