Drive Belt Tensioner: Testing and Inspection

Drive Belt Auto-tensioner Inspection

Special Tools Required

- Belt Tension Release Tool Snap-on YA9317 or equivalent, commercially available

1. Turn the ignition switch to ON (II), and make sure to turn the A/C switch OFF. Turn the ignition switch to LOCK (0).

2. Check the position of the auto-tensioner indicator's pointer (A). Start the engine, then check the position again with the engine idling. If the position of the indicator moves or fluctuates a lot, replace the auto-tensioner Drive Belt Auto-Tensioner Removal/Installation.






3. Check for abnormal noise from the tensioner pulley. If you hear abnormal noise, replace the tensioner pulley.

4. Remove the drive belt Service and Repair.

5. Move the auto-tensioner within its limit using the belt tension release tool in the direction shown. Check that the tensioner moves smoothly and without any abnormal noise. If the tensioner does not move smoothly, or you hear abnormal noise, replace the auto-tensioner.






6. Remove the auto-tensioner Drive Belt Auto-Tensioner Removal/Installation.

7. Clamp the auto-tensioner (A) by using two 8 mm bolts (B) and a vise (C) as shown. Do not clamp the auto-tensioner itself.









8. Attach the torque wrench (D) on the pulley bolt, and align it as shown.

9. Align the indicator (E) on the tensioner base with center mark (F) on the tensioner arm by using the torque wrench, and measure the torque. If the torque value is out of specification, replace the auto-tensioner.

NOTE: If the indicator exceeds the center mark, recheck the torque.