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Re: I am changing my alternator and need to release the...
If you need to release the belt. look at the front of you hood next to your raditor where all the stickers are. it should show you the diagram of the belt and it should show you where the tensiner is. you will need to release the tensiner to take the belt off. usually it is a pully about mid way down. you will either have to stick and 1/2 drive into it and pull it towrads you or use a crow bar to grap the bolt that sticks out. and pull on it that way. if you do not see a tensioner. than do this.
look at your alternator and see it should have 2 bolts holding it on. look and see if the is a slot where one of the bolts can slid back and forth. if so than all you need to do is loosen the bolt that does not slide but do not take it off. and than loosesn the bolt that slide. it will allow you alternator to move freely and release the belt. after that take the alternator off and install the new one. after that do not tighten the bolt the is able to slide as you will need this to move when putting the belt back on.
put the belt back on the use a crow bar to push the alternator away from you so it will tightn the belt. than have someone tighten the bolts back up and you should be good to go.
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In almost all cases you have an idler tension pulley which rides against belt between alternator and main pulley at crankshaft, so it will have to be first thing to loosen to release tension on belt to remove. There is a special tool for releasing tension while you tighten it to put new belt on. Take some pictures before you pull off belt for it can get confusing if you don't know what you are doing entirely. These belts take some dramatic looping.
The procedure Im giving here is for a vt v6 commodore.
The main belt tensioner is located near the alternator to release the drive belt tension you need to to becareful.
The bolt in the centre of the tensioner you will need to place a 13 or 15mm spanner over and very careful and slow apply pressurer
you will find there is reasonable amount of tensioner there but as u move the tensioner the drive belt will become loose and more movement for easier removly.
lift the drive belt off the alternator pulley once that's done then very slowly and gently let the tensioner return to the home position.
Same procedure to refit..
Loosen the tensioner for the accessory belt for the alternator and remove the belt. Remove the two long bolts that are holding the alternator in the bracket. (Sometimes you have to remove the tensioner arm completely or just loosen it and it will slide over to relieve tension on belt) Full article: http://www.ehow.com/how-does_4829335_removing-alternator-pontiac-sunfire.html
Insert a 3?8 in. drive ratchet or a breaker bar in the hole on the automatic tensioner, then pull the tool toward the front of the vehicle.
While releasing the belt tension, remove the drive belt from the tensioner pulley and slip it off the remaining accessory pulleys.
Fig. 1: Insert a 3?8 in. drive ratchet or breaker bar into the hole of the automatic tensioner
Fig. 2: Pull the breaker bar or ratchet toward the front of the vehicle to relieve belt tension
Fig. 3: Once the tension has been released, remove the belt from the pulleys and the vehicle
Position the drive belt over the accessory pulleys.
Insert the 3?8 in. drive ratchet or breaker bar into the hole of the automatic tensioner, then pull the tool toward the front of the vehicle.
While holding the tool in this position, slip the drive belt behind the tensioner pulley and release the tool.
Remove the tool from the automatic tensioner.
Check that all V-grooves make proper contact with the pulley.
Hi, the first thing you will need to do is disconnect the battery cable. then take a wrench and release the tension on the serpentine belt by using the wrench to turn the tensioner to release the tension. From expirience i would draw a diagram of the belt routing before removing it. after the belt is removed you will need to remove the power wire from the back of the alternator by removing the nut that holds it on, then remove the connector from the side or back. there are three bolts holding the alternator to the engine. they should be a 15 mm or a 13 mm. assembly is reverse of removal. good luck