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1.Disconnect the battery by turning the positive terminal bolt in a counterclockwise direction with a 10mm socket wrench. Disconnect the terminal nut on the alternator by turning it counterclockwise with an open-ended wrench. Store the terminals away from the battery.
Disconnect the Intrigue's serpentine fan belt by pressing on the tension pulley arm firmly then working the belt out from underneath the idle pulley. Release the tension pulley arm so the belt will have enough slack to be removed from the alternator pulley wheel.
Remove the mount bolts by turning the nuts counterclockwise, holding the bolt head with a socket wrench. Slide the bolts out of the mount arms. Replace the alternator with a new unit by positioning it into the mount arms and sliding the bolts through the mount holes. Tighten all nuts securely.
Replace the drive belt by wrapping the belt around the alternator pulley wheel then pressing on the tension arm to slide the belt back underneath the idle pulley. Release the arm and the belt will tighten to an automatic adjustment.
Reconnect the alternator's wiring harness connection by placing the terminal over the connection bolt and securing the nut clockwise with a small wrench. Reconnect the battery by turning the terminal bolt clockwise with a 10 mm socket.
Verbal description of the complete serpentine belt loop on a 99 Olds 3.5 V6: This is from Benny 1345 (Answers.com) - off the top of my head it sounds right: Top of CAM to top of ALTERNATOR - bottom of ALTERNATOR to top of nearby (front) PULLEY - bottom of PULLEY to top of A/C COMPRESSOR - bottom of COMPRESSOR to bottom of CRANK - top of CRANK to bottom of middle PULLEY - top of middle PULLEY to bottom of rear TENSIONER - top of TENSIONER to back to top of CAM. Remember the serpentine belt has ribs on only one side, the ribs face AWAY from the two guide pulleys and TOWARD the pulleys on the Alternator, Compressor, Crank, Cam and Tensioner. You should tell by the pulley being smooth or ribbed as needed.
Providing your guage is working correctly; look just inside the fan, you should see a wire coming from the fan motor, follow the wire. It will end up at a sending unit that looks similar to a fitting. This is what tells the fans when to turn on.
you have to pull the radiator to get the alternator out. had to do this couple months ago. then after you get it unbolted you need to slide it past exhaust and out toward the drivers side of car. pulling radiator was rediculous, but the only way!!!! hope that helps