A SASIC 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. ASTRA J Sports Tourer (P10)
2. ASTRA H Estate Van (L70)
3. ASTRA H Van (L70)
4. ASTRA J (P10)
5. ASTRA G Hatchback (T98)
6. ASTRA G Saloon (T98)
7. ASTRA J GTC
8. ASTRA J Coupe
9. ASTRA G Estate (T98)
10. CORSA C (X01)
11. VITA C (X01)
12. COMBO Box Body/MPV
13. CIVIC VII Hatchback (EU, EP, EV)
14. MERIVA A MPV (X03)
15. COMBO Tour
16. ASTRA H (A04)
17. ASTRA H Estate (A04)
18. ASTRA H GTC (A04)
19. CORSA D (S07)
20. ZAFIRA / ZAFIRA FAMILY B (A05)
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.