A SNR 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 II (A16_)
2. GALANT II Saloon (A16_)
3. GALANT Mk II (A16_)
4. GALANT III (E1_A)
5. GALANT III Saloon (E1_A)
6. SIGMA III (E1_A)
7. GALANT Mk III (E1_A)
8. ETERNA III (E1_A)
9. SAPPORO II (A16_A)
10. SAPPORO Mk II (A16_A)
11. SAPPORO III (E16A)
12. SAPPORO Mk III (E16A)
13. STARION (A18_A)
14. STARION (A18_A, JA, JB, JD)
15. SPACE WAGON (D0_V/W)
16. NIMBUS (D0_V/W, UA, UB, UC)
17. CHARIOT (D0_V/W)
18. L 300 III Van (P0_V, P1_V, P_2V)
19. EXPRESS III Van (SF, SG, SH, SJ, WA, P0_V, P1_V, P_2V)
20. DELICA III Van (P0_V, P1_V, P_2V)
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.