There A bolt half inch located outside a plate of the alternator on the fire wall side turn it counterclockwise either with a long wrench from on top or under the car
unbolt the negative power wire unplug the positive power wore remove the tension bolt on the top of the alternator remove the lower bolt and pull out the alternator
how to release serpentine belt tensioner on 1991 C1500 Chevy Silverado?
You don't. A 1991 Cavalier did not come with airbags.
The map sensor on a 1991 cavalier is on the passenger side firewall towards the top.
were is a ALTERNATOR
I know that on the E30's (until 1991) the alternator has a mounting bolt that controls tension on the belt. (1)Just loosen that bolt and the rest is a breeze. (2) Move the alternator in to remove the old belt. (3) Put the new one on. (4) Use a bar or large wrench as a lever to move the alternator out and to put tension on the belt. (5) Hold it there while tightening the mounting bolt. (6) Wash your hands 'cause you're done.
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Integrated into the alternator.
Look at the face of the alternator. Below it is a round thing that looks like a dial. Loosen that nut - 15mm...To the right of the alternator - or if you are standing in front of the car -- in front of the alternator, below it -- is a nut on a threaded rod -- 1/2" socket AND a universal adapter because of the extreme angle of this nut.... This is what pushes the alternator up or down.CCW allows pushing the alternator down ( loosen the belt ) -- andCW brings the alternator back up ( tighten belt )StanFarmington CT
inside the alternator. check the fusable link at the alternator and at the starter before changing the alternator.
Disconnect the 1991 Regal battery. Remove the alternator belt and wiring. Unbolt the alternator and install the new one. Reconnect the wires, install the belt, then reconnect the battery.
Behind the glove box.