A DAYCO 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. LANCER IV Hatchback (C6_A, C7_A)
2. LANCER IV Hatchback (C6_A, C7_A, CA, CB)
3. LANCER Mk IV Hatchback (C6_A, C7_A)
4. COLT IV (CA_A)
5. COLT Mk IV (CA_A)
6. SPACE WAGON (N3_W, N4_W)
7. NIMBUS (N3_W, N4_W, UF)
8. EXPO (N3_W, N4_W)
9. CHARIOT (N3_W, N4_W)
10. SPACE RUNNER (N1_W, N2_W)
11. RVR (N1_W, N2_W)
12. GALANT V Saloon (E5_A, E7_A, E8_A)
13. GALANT Mk V Saloon (E5_A, E7_A, E8_A)
14. ETERNA V Saloon (E5_A, E7_A, E8_A)
15. GALANT V (E5_A, E7_A, E8_A)
16. GALANT V (E5_A, E7_A, E8_A, HJ)
17. GALANT Mk V (E5_A, E7_A, E8_A)
18. LANCER V (CB_A, CD_A, CE_A)
19. LANCER V Saloon (CB_A, CC, CD_A, CE_A)
20. LANCER Mk V (CB_A, CD_A, CE_A)
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.