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. 323 S V (BA)
2. 323 PROTEGE V Saloon (BA)
3. PROTEGE V (BA)
4. 323 S Mk V (BA)
5. FAMILIA V (BA)
6. 323 PROTEGE V (BA)
7. ETUDE V (BA)
8. 323 P V (BA)
9. 323 P Mk V (BA)
10. 323 S VI (BJ)
11. 323 PROTEGE VI (BJ)
12. PROTEGE VI (BJ)
13. ALLEGRO MK VIII (BJ)
14. 323 S Mk VI (BJ)
15. FAMILIA VI (BJ)
16. ETUDE VI (BJ)
17. 323 F VI (BJ)
18. 323 ASTINA VI (BJ)
19. PROTEGE5 VI (BJ)
20. 323 F/P Mk VI (BJ)
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.