A FAI AutoParts 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. 308 SW II (LC_, LJ_, LR_, LX_, L4_)
2. 308 II (LB_, LP_, LW_, LH_, L3_)
3. 208 I (CA_, CC_)
4. C4 CACTUS
5. C4 II (B7)
6. DS3 Convertible
7. DS3
8. DS4 (NX_)
9. C3 II (SC_)
10. 2008 I (CU_)
11. 2008 I SUV (CU_)
12. 5008 (0U_, 0E_)
13. 3008 MPV (0U_)
14. C3 PICASSO (SH_)
15. C4 PICASSO II
16. C4 GRAND PICASSO II (DA_, DE_)
17. DS 3 (SA_)
18. DS3 (SA_)
19. DS 3 Convertible (SB_)
20. DS3 Convertible (SB_)
21. 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.