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. C4 II (B7)
2. 508 I (8D_)
3. 508 SW I (8E_)
4. SCUDO Van (270_, 272_)
5. SCUDO Bus (270_, 272_)
6. SCUDO MPV (270_, 272_)
7. MONDEO IV Turnier (BA7)
8. MONDEO IV (BA7)
9. C8 (EA_, EB_)
10. 807 (EB_)
11. GALAXY (WA6)
12. S-MAX (WA6)
13. DS4 (NX_)
14. C4 PICASSO I MPV (UD_)
15. FOCUS III Saloon
16. FOCUS III
17. FOCUS III Turnier
18. DS5
19. EXPERT TEPEE (VF3X_)
20. EXPERT Van (VF3A_, VF3U_, VF3X_)
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.