Tensioner Pulley, timing belt - 531 0189 20 INA

A INA 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. VEROSSA (_X11_)
2. CRESSIDA Saloon (_X6_)
3. CRESSIDA Saloon (MX62, _X6_)
4. ALTEZZA (_E1_)
5. ALTEZZA GITA Estate (_XE1_)
6. CHASER (_X9_)
7. CRESTA (_X7_)
8. CORONA Saloon (_T21_)
9. CHASER (_X8_)
10. CRESSIDA Saloon (_X8_)
11. CRESSIDA Saloon (_X8_, MX83)
12. CRESTA Saloon (_X8_)
13. CRESTA Saloon
14. CRESSIDA Estate (_X8_)
15. CROWN (_S13_)
16. MARK II Saloon
17. MARK II Saloon (_X10_)
18. MARK II Estate (_X1_, _V2_)
19. CORONA EXSIOR (_X9_)
20. CROWN (_S14_, _S13_)
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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.