Drive Belt Tensioner Diagnosis

/ 9-5 (9650) / 2011 / 2. Engine / Basic engine, V6 / Fault diagnosis, fault symptoms / Drive Belt Tensioner Diagnosis

Step	Action	Yes	No
1	Remove the drive belt. Refer to Drive Belt Replacement . Inspect the drive belt tensioner pulley. Is the drive belt tensioner pulley loose or misaligned?	Go to	Go to
2	Rotate the drive belt tensioner. Does the tensioner rotate without any unusual resistance or binding?	Go to	Go to
3	1. Use a torque wrench in order to measure the torque required to move the tensioner off of the stop. 2. Use a torque wrench on a known good tensioner in order to measure the torque required to move the tensioner off of the stop. Is the first torque reading within 10% of the second torque reading?	System OK	Go to
4	Replace the drive belt tensioner. Refer to Drive Belt Tensioner Replacement . Is the repair complete?	System OK	-

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