A VAICO 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. LANCER II (A17_)
2. LANCER II Saloon (A17_)
3. LANCER � (A17_)
4. GALANT II (A16_)
5. GALANT II Saloon (A16_)
6. GALANT Mk II (A16_)
7. GALANT III (E1_A)
8. GALANT III Saloon (E1_A)
9. SIGMA III (E1_A)
10. GALANT Mk III (E1_A)
11. ETERNA III (E1_A)
12. SAPPORO II (A16_A)
13. SAPPORO Mk II (A16_A)
14. SAPPORO III (E16A)
15. SAPPORO Mk III (E16A)
16. CORDIA (A21_A, AB, AC)
17. CORDIA (A21_A, AA, AB, AC)
18. STARION (A18_A)
19. STARION (A18_A, JA, JB, JD)
20. SPACE WAGON (D0_V/W)
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.