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. MEGANE CC (EZ0/1_)
2. FLUENCE (L3_)
3. SCENIC III (JZ0/1_)
4. GRAND SCENIC III (JZ0/1_)
5. SCENIC II (JM0/1_)
6. MEGANE III Hatchback (BZ0/1_, B3_)
7. MEGANE II (BM0/1_, CM0/1_)
8. MEGANE II Coupe-Cabriolet (EM0/1_)
9. MEGANE II Saloon (LM0/1_)
10. MEGANE II Estate (KM0/1_)
11. MEGANE II Grandtour (KM0/1_)
12. MEGANE II Sport Tourer (KM0/1_)
13. GRAND SCENIC II (JM0/1_)
14. MODUS / GRAND MODUS (F/JP0_)
15. LAGUNA II (BG0/1_)
16. LAGUNA II Grandtour (KG0/1_)
17. LAGUNA II Sport Tourer (KG0/1_)
18. CLIO III (BR0/1, CR0/1)
19. EURO CLIO III (BR0/1, CR0/1)
20. CLIO CAMPUS III (BR0/1, CR0/1)
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.