Grand Prix V6-191 3.1L (1989)
Drive Belt: Adjustments
NOTE Belt tension is maintained by the tensioner and is not adjustable.
Belt Tension Gage
Serpentine Drive Belt
1. Run engine, with no accessories on, until normal operating temperature is reached. Turn engine off and read belt tension using belt tension gauge
J-23600-B or equivalent. Place gauge halfway between alternator and power steering pump.
2. Start engine, with accessories off, and allow system to stabilize for 15 seconds. Turn engine off. Using a 15 mm socket, apply clockwise force to
tensioner pulley bolt. Release force and immediately take a tension reading without disturbing belt tensioner position.
3. Using a 15 mm socket, apply counterclockwise force to tensioner pulley bolt, raise pulley to eliminate all tension. Slowly lower pulley to belt and
take a tension reading without disturbing belt tensioner position.
4. Average three readings. If average is not between 225 and 315 Nm (50-70 lbs) and belt is within tensioner's operating range, replace belt
tensioner. Refer to Drive Belt Tensioner / Service and Repair.