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. LAND CRUISER PRADO (_J15_)
2. LAND CRUISER (_J7_)
3. CAREVACA (_J7_)
4. LAND CRUISER PRADO (_J7_)
5. LAND CRUISER Hardtop (_J7_)
6. LAND CRUISER FRP Top (_J7_)
7. 4 RUNNER (_N1_)
8. SW4 (_N1_)
9. HILUX SURF (_N1_)
10. SURF (_N1_)
11. LAND CRUISER 90 (_J9_)
12. LAND CRUISER PRADO (_J9_)
13. LAND CRUISER COLORADO (_J9_)
14. MERU (_J9_)
15. DYNA Platform/Chassis (KD_, LY_, _Y2_, _U3_, _U4_)
16. HIACE IV Bus (__H1_, __H2_)
17. HILUX VI Pickup (_N1_)
18. TACOMA VI Pickup (_N1_)
19. HILUX MIGHTY X / HILUX TIGER VI Pickup (_N1_)
20. HIACE IV Van (__H1_, __H2_)
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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.