Tensioner Pulley, timing belt - 12.15463 DT Spare Parts

A DT Spare Parts 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. DOBLO Cargo (263_)
2. DOBLO MPV (263_)
3. DOBLO Kombi (263_)
4. DOBLO Combi (263_)
5. SEDICI (FY_)
6. GIULIETTA (940_)
7. BRAVO II (198_)
8. RITMO III (198_)
9. MUSA (350_)
10. BRERA (939_)
11. SPIDER (939_)
12. 159 (939_)
13. 159 Saloon (939_)
14. 159 Sportwagon (939_)
15. ASTRA H Estate Van (L70)
16. ASTRA H Van (L70)
17. DOBLO Platform/Chassis (263_)
18. PRATICO Platform/Chassis (263_)
19. IDEA (350_)
20. GRANDE PUNTO (199_)
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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.