A HERTH+BUSS JAKOPARTS 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. GALANT V Saloon (E5_A, E7_A, E8_A)
2. GALANT Mk V Saloon (E5_A, E7_A, E8_A)
3. ETERNA V Saloon (E5_A, E7_A, E8_A)
4. GALANT V (E5_A, E7_A, E8_A)
5. GALANT V (E5_A, E7_A, E8_A, HJ)
6. GALANT Mk V (E5_A, E7_A, E8_A)
7. GALANT VI (EA_)
8. GALANT VI Saloon (EA_)
9. GALANT / ASPIRE Mk VI (EA_)
10. ASPIRE VI (EA_)
11. GALANT VI Estate (EA_)
12. GALANT Mk VI Estate (EA_)
13. LEGNUM VI Estate (EA_)
14. FTO Coupe (DE_A)
15. 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.