TENSIONER PULLEY TIMING BELT FOR ALFA ROMEO 155 145 146 GTV SPIDER 156 166 2.0L DAYCO ATB2215

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. 155 (167_)
2. 145 (930_)
3. 146 (930_)
4. GTV (916_)
5. SPIDER (916_)
6. DELTA II (836_)
7. DELTA Mk II (836_)
8. DEDRA (835_)
9. DEDRA SW (835_)
10. COUPE (175_)
11. 156 (932_)
12. 166 (936_)
13. 166 Saloon (936_)
14. 156 Sportwagon (932_)
15. 147 (937_)
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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.