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. SAPPORO III (E16A)
2. SAPPORO Mk III (E16A)
3. STARION (A18_A)
4. STARION (A18_A, JA, JB, JD)
5. SPACE WAGON (D0_V/W)
6. NIMBUS (D0_V/W, UA, UB, UC)
7. CHARIOT (D0_V/W)
8. L 300 III Van (P0_V, P1_V, P_2V)
9. EXPRESS III Van (SF, SG, SH, SJ, WA, P0_V, P1_V, P_2V)
10. DELICA III Van (P0_V, P1_V, P_2V)
11. L 300 III Bus (P0_W, P1_W, P2_W, P3_W)
12. STARWAGON III Bus (P0_W, P1_W, P2_W, SD, SE, SF, SG, SH, SJ,
13. DELICA III Bus (P0_W, P1_W, P2_W, P3_W)
14. SONATA III (Y-3)
15. SONATA III Saloon (Y-3)
16. SONATA Mk II (Y-3)
17. SONICA III (Y-3)
18. PAJERO II (V3_W, V2_W, V4_W)
19. PAJERO II (V3_W, V2_W, V4_W, NH, NJ, NK, NL)
20. MONTERO � (V3_W, 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.