Tension​ ​roller:​ ​common​ ​defects​ ​and​ ​their​ ​signs

1. Wear of V-belt tension roller.
   • The alternator doesn’t supply the car mains with electric energy.
   • Excessive noise appears during alternator operation.
   • The belt and the roller strongly vibrate while working.
   • Displacement of the alternator belt occurred.
2. Mechanical damages.
   • Free play appears during roller rotation.
   • The alternator belt wears out unevenly.
   • Belt deflection value is higher than normal.
   • Rotation of the roller is troubled, screech appears.

How to replace tension roller?

Operation lifetime of the V-belt tension roller and the timing belt tension roller is almost equal and it is about 60 000 – 75 000 operational kilometers.

If any signs of defects of the alternator belt roller noted above were found, it should be replaced. Specialists recommend to perform replacement of the car V-belt roller and the timing belt tension roller simultaneously with the tensioners and the belts. It is necessary to perform component replacement at a service station, because such work requires specific knowledge and tools.