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. HARRIER (_U3_)
2. CAMRY Saloon (_V3_)
3. RX (_U3_)
4. PREVIA (_R3_)
5. TARAGO (_R3_)
6. PREVIA / ESTIMA (_R3_)
7. ESTIMA (_R3_)
8. ALPHARD (_H1_)
9. SOLARA Coupe (_V3_)
10. SOLARA Convertible (_V3_)
11. WINDOM (_V3_)
12. HIGHLANDER / KLUGER (_U2_)
13. KLUGER (_U2_)
14. SIENNA (_L2_)
15. ES (MCV_, VZV_)
16. ES Saloon (MCV_, VZV_)
17. SIENNA Mini Cargo Van (_L2_)
18. See more in applications

The operation of the timing belt tensioner

The BLUE PRINT 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.