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. E Platform/Chassis (SD1)
2. E Platform/Chassis (SD1, SL)
3. VITARA (ET, TA, TD)
4. SIDEKICK (ET, TA, TD)
5. ESCUDO (ET, TA, TD)
6. E Van (SR2)
7. BONGO Van (SR2)
8. BESTA Van
9. GRAND VITARA I (FT, HT)
10. GRAND VITARA (INC XL-7) I (FT, HT)
11. GRAND VITARA XL-7 I (FT, HT)
12. GRAND ESCUDO I (FT, HT)
13. GRAND NOMADE / GRAND VITARA / GRAND ESCUDO / XL-7 I (FT, HT)
14. B-SERIE (UF)
15. B-SERIE BRAVO Pickup (UF)
16. B-SERIE SUV (UF)
17. PROCEED/DRIFTER (UF)
18. 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.