Lumina L4-151 2.5L (1991)
Drive Belt Tensioner: Testing and Inspection
Serpentine Drive Belt Removal & Installation
Tool Required:
J 23600-B Belt Tension Gauge
1. Run engine, with no accessories on, until the engine is warmed up. Shut the engine off and read belt tension using J 23600-B placed halfway
between the generator and the power steering pump. Note reading and remove J 23600-B.
2. Start the engine (with accessories off) and allow the system to stabilize for 15 seconds. Turn the engine off. Using a 15 mm socket, apply
clockwise force (tighten) to the tensioner pulley bolt. Release' the force and immediately take a tension reading without disturbing belt tensioner
position
3. Using the same wrench, apply a counterclockwise force to the tensioner pulley bolt and raise the pulley to eliminate all tension. Slowly lower the
pulley to the belt and take a tension reading without disturbing the belt tensioner position.
4. Average the three readings. If the average of the three reading is not between 225 and 315 N (50 and 70 lbs.) and the belt is within the tensioner's
operating range, replace the belt tensioner.
