A OPTIMAL 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. GALANT IV Saloon (E3_A)
2. GALANT IV Saloon (E3_A, HG, HH)
3. GALANT Mk IV Saloon (E3_A)
4. ETERNA IV Saloon (E3_A)
5. GALANT IV (E3_A)
6. GALANT IV (E3_A, HG, HH)
7. GALANT Mk IV (E3_A)
8. ETERNA IV (E3_A)
9. SONATA III (Y-3)
10. SONATA III Saloon (Y-3)
11. SONATA Mk II (Y-3)
12. SONICA III (Y-3)
13. 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.