Use a straight edge.
pulley puller
To change the crankshaft position sensor on a 1999 Oldsmobile Silhouette, first disconnect the negative battery cable to ensure safety. Locate the sensor, which is typically found near the crankshaft pulley; remove any components obstructing access. Disconnect the electrical connector and unscrew the sensor from its mounting position. Install the new sensor by reversing the steps, ensuring it is securely fastened and reconnected before reconnecting the battery.
Begin by loosening the tensioner pulley on your 1999 Oldsmobile Cutlass. Put your serpentine belt around the pulleys. Tighten the serpentine belt with the tensioner pulley.
it is self adjusting .
On front cover of engine by crankshaft pulley.
To replace the tensioner pulley on a 2000 Oldsmobile Intrigue, first, disconnect the negative battery terminal for safety. Then, use a wrench or socket to relieve tension on the serpentine belt by turning the tensioner pulley counterclockwise. Remove the old tensioner pulley by unbolting it and then install the new pulley in its place, securing it with bolts. Finally, reattach the serpentine belt, ensuring it's properly aligned, and reconnect the battery terminal.
Serpentine belt and pulley diagrams at www.alldatapro.com
bottom pulley. at end of crank.
The part number is 587260
To replace the idler pulley on a 1997 Oldsmobile Aurora with a Northstar V8 engine, first, disconnect the negative battery cable. Remove the serpentine belt by using a wrench on the tensioner pulley to relieve tension. Then, unbolt the old idler pulley from its mounting bracket and replace it with the new pulley, ensuring it’s securely fastened. Finally, re-install the serpentine belt and reconnect the battery cable.
When looking at the engine from the front, the tension pulley is the only wheel on the drive belt that has the belt on the inside of it. All of the other pulleys have the belt going around the top of the pulley. The tension pulley has a bolt that can be loosened and then tightened to remove the drive belt.
check main pulley area bottom by harmonic balance