A 3RG 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. 206 SW (2E/K)
2. 206 Hatchback (2A/C)
3. C3 I (FC_, FN_)
4. 307 Break (3E)
5. 307 Estate (3E)
6. 307 (3A/C)
7. 307 SW (3H)
8. C4 I (LC_)
9. C4 Coupe (LA_)
10. 1007 (KM_)
11. 207 (WA_, WC_)
12. 207/207+ (WA_, WC_)
13. C2 (JM_)
14. 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.