A OPTIMAL 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. CARISMA (DA_)
2. COLT V (CJ_, CP_)
3. MIRAGE V (CJ_, CP_)
4. COLT Mk V (CJ_, CP_)
5. CARISMA Saloon (DA_)
6. PAJERO PININ (H6_W, H7_W)
7. PAJERO IO (H6_W, H7_W, QA)
8. PAJERO TR4 (H6_W, H7_W)
9. MONTERO IO (H6_W, H7_W)
10. SHOGUN PININ (H6_W, H7_W)
11. IO (H6_W, H7_W)
12. PAJERO IO (H6_W, H7_W)
13. LANCER VI (CJ_, CP_)
14. LANCER VI Saloon (CJ_, CP_)
15. LANCER Mk VI (CJ_, CP_)
16. SPACE STAR MPV (DG_A)
17. JUNJIE (M2)
18. ZUNCHI (M1)
19. GALENA (M1)
20. PAJERO SPORT I (K7_, K9_)
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.