Drive Belt Tensioner: Testing and Inspection
Drive Belt Auto-tensioner InspectionSpecial Tools Required
Belt tension release tool Snap-on YA9317 or equivalent, commercially available
1. Remove the right side engine compartment cover.
2. 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.
3. Check for abnormal noise from the tensioner pulley. If you hear abnormal noise, replace the auto-tensioner pulley.
4. Remove the drive belt.
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 if you hear abnormal noise, replace the auto-tensioner.
6. Remove the auto-tensioner.
7. Clamp the auto-tensioner (A) by using a 10 mm bolt (B), 8 mm bolt (C) and a vise (D) as shown. Do not clamp the auto-tensioner itself.
8. Attach a torque wrench (A) to the pulley bolt. Measure the torque when the tensioner is turned counterclockwise and begin to move. If the torque is less than the specified value, replace the auto-tensioner.