A BLUE PRINT brand Tensioner Pulley, timing belt is a part of the timing belt drive, which serves to bypass the belt in a certain place or several places and is a freely rotating pulley of small diameter.

The composition of the roller is small: it is the roller mount, the internal rolling bearing with a protective oil seal, and the working body of the roller itself, which is in contact with the belt.

1. COROLLA Liftback (_E8_)
2. COROLLA FX Compact (E8B)
3. COROLLA Coupe (AE86)
4. COROLLA SPRINTER Coupe (AE86)
5. COROLLA Compact (_E9_)
6. CELICA Hatchback (_T16_)
7. MR2 I (AW1_)
8. CELICA Coupe (_A6_)
9. SUPRA Coupe (_A6_)
10. COROLLA (_E8_)
11. COROLLA Saloon (_E8_)
12. COROLLA Liftback (_E9_)
13. CELICA Coupe (_T16_)
14. COROLLA LEVIN Coupe (_E10_)
15. CELICA (_A6_)
16. COROLLA Coupe (_E9_)
17. See more in applications

The principles of the timing belt tensioner work

Excessive tension leads to intensive wear of the timing parts - pulley bearings (water pump, generator, tensioner, etc.), the belt itself, and others. In addition, a tight belt stretches faster and shortens its service life. Too little preload is fraught with more serious problems - slipping of the belt along the toothed pulleys of the camshafts, which leads to a violation of the valve timing and deterioration of the entire engine.

Therefore, a tensioning device is introduced into the timing drive in the form of rollers of one design or another, which, during engine operation, maintain an optimal belt tension.