A BLUE PRINT 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 Mk VI (J) Estate (P10)
3. ORLANDO (J309)
4. MOKKA / MOKKA X (J13)
5. CRUZE (J300)
6. AVEO Hatchback (T300)
7. SONIC Hatchback (T300)
8. CRUZE Hatchback (J305)
9. AVEO Saloon (T300)
10. SONIC Saloon (T300)
11. ASTRA J GTC
12. ASTRA J Coupe
13. ASTRA Mk VI (J) GTC (P10)
14. ASTRA H (A04)
15. ASTRA H Estate (A04)
16. INSIGNIA A (G09)
17. INSIGNIA A Saloon (G09)
18. INSIGNIA Mk I (A) Saloon (G09)
19. AVEO / KALOS Saloon (T250, T255)
20. AVEO / GENTRA Saloon (T250, T255)
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.