A INA 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. GRAND VITARA II (JT, TE, TD)
2. GRAND VITARA XL-7 II (JT, TE, TD)
3. GRAND ESCUDO II (JT, TE, TD)
4. GRAND VITARA II SUV (JT, TE, TD)
5. GRAND NOMADE / GRAND VITARA II (JT, TE, TD)
6. GRAND NOMADE / GRAND VITARA / GRAND ESCUDO II (JT, TE, TD)
7. MEGANE III Hatchback (BZ0/1_, B3_)
8. MEGANE III Coupe (DZ0/1_)
9. MEGANE III Grandtour (KZ0/1)
10. GRAN TOUR III Grandtour (KZ0/1)
11. SCENIC III (JZ0/1_)
12. GRAND SCENIC III (JZ0/1_)
13. MEGANE CC (EZ0/1_)
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.