Drive Belt Tensioner: Testing and Inspection

Auto-tensioner Inspection




1. Check the position of the auto-tensioner indicator's pointer (A), start the engine, then check the position of the pointer again. If the position changes, replace the auto-tensioner.
2. Check for abnormal noise from the tensioner pulley. If you hear abnormal noise, replace the auto-tensioner.
3. Remove the alternator-compressor belt.




4. Move the auto-tensioner within its limit with the wrench in the direction shown. Check that the tensioner moves smoothly and without any abnormal noise. If the tensioner does not move smoothly or there is abnormal noise, replace the auto-tensioner.
5. Remove the auto-tensioner.




6. Clamp the auto-tensioner (A) by using two 6 mm bolts (B) and a vise (C) as shown. Do not clamp the auto-tensioner itself.




7. Attach a torque wrench (A) to the pulley bolt. measure the torque when the tensioner is turned counterclockwise. If the torque is less than the specified value, replace the auto-tensioner.