A DAYCO 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. LANCER IV Hatchback (C6_A, C7_A)
2. LANCER IV Hatchback (C6_A, C7_A, CA, CB)
3. LANCER Mk IV Hatchback (C6_A, C7_A)
4. COLT IV (CA_A)
5. COLT Mk IV (CA_A)
6. PERSONA 400 Hatchback (C9_C, C9_S)
7. WIRA Hatchback (C9_C, C9_S)
8. CARISMA (DA_)
9. CARISMA Saloon (DA_)
10. SPACE STAR MPV (DG_A)
11. S40 I (644)
12. S40 I Saloon (644)
13. V40 Estate (645)
14. PAJERO PININ (H6_W, H7_W)
15. PAJERO IO (H6_W, H7_W, QA)
16. PAJERO TR4 (H6_W, H7_W)
17. MONTERO IO (H6_W, H7_W)
18. SHOGUN PININ (H6_W, H7_W)
19. IO (H6_W, H7_W)
20. PAJERO IO (H6_W, H7_W)
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.