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. SIGMA (F2_A, F1_A)
2. GALANT V Saloon (E5_A, E7_A, E8_A)
3. GALANT Mk V Saloon (E5_A, E7_A, E8_A)
4. ETERNA V Saloon (E5_A, E7_A, E8_A)
5. GALANT V (E5_A, E7_A, E8_A)
6. GALANT V (E5_A, E7_A, E8_A, HJ)
7. GALANT Mk V (E5_A, E7_A, E8_A)
8. 3000 GT Coupe (Z1_A)
9. GTO Coupe (Z1_A)
10. PAJERO II (V3_W, V2_W, V4_W)
11. PAJERO II (V3_W, V2_W, V4_W, NH, NJ, NK, NL)
12. MONTERO � (V3_W, V2_W, V4_W)
13. PAJERO/SHOGUN Mk II (V3_W, V2_W, V4_W)
14. PAJERO SFX /SHOGUN II (V3_W, V2_W, V4_W)
15. PAJERO/SHOGUN II (V3_W, V2_W, V4_W)
16. MONTERO II (V3_W, V2_W, V4_W)
17. SHOGUN II (V3_W, V2_W, V4_W)
18. PAJERO II Canvas Top (V2_W, V4_W)
19. MONTERO � Canvas Top (V2_W, V4_W)
20. PAJERO/SHOGUN � Canvas Top (V2_W, V4_W)
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.