A SWAG 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. 6 Hatchback (GG)
2. ATENZA Hatchback (GG)
3. 6 Saloon (GG)
4. ATENZA Saloon (GG)
5. 6 Station Wagon (GY)
6. ATENZA Station Wagon (GY)
7. MPV II (LW)
8. MPV Mk II (LW)
9. 5 (CR19)
10. PREMACY (CR19)
11. 6 Saloon (GH)
12. ATENZA Saloon (GH)
13. 6 Hatchback (GH)
14. 6 Sport (GH)
15. ATENZA Hatchback (GH)
16. 3 (BK)
17. AXELA (BK)
18. 3 Saloon (BK)
19. AXELA Saloon (BK)
20. 6 Estate (GH)
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.