A SWAG 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. L 300 III Van (P0_V, P1_V, P_2V)
2. EXPRESS III Van (SF, SG, SH, SJ, WA, P0_V, P1_V, P_2V)
3. DELICA III Van (P0_V, P1_V, P_2V)
4. L 300 III Bus (P0_W, P1_W, P2_W, P3_W)
5. STARWAGON III Bus (P0_W, P1_W, P2_W, SD, SE, SF, SG, SH, SJ,
6. DELICA III Bus (P0_W, P1_W, P2_W, P3_W)
7. SONATA II (Y-2)
8. SONATA � (Y-2)
9. SONATA III (Y-3)
10. SONATA III Saloon (Y-3)
11. SONATA Mk II (Y-3)
12. SONICA III (Y-3)
13. PAJERO II (V3_W, V2_W, V4_W)
14. PAJERO II (V3_W, V2_W, V4_W, NH, NJ, NK, NL)
15. MONTERO � (V3_W, V2_W, V4_W)
16. PAJERO/SHOGUN Mk II (V3_W, V2_W, V4_W)
17. PAJERO SFX /SHOGUN II (V3_W, V2_W, V4_W)
18. PAJERO/SHOGUN II (V3_W, V2_W, V4_W)
19. MONTERO II (V3_W, V2_W, V4_W)
20. SHOGUN II (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.