How do you stall an alternator belt in a Toyota Celica 1995?

It's not hard, but you will need a helper and a few hand tools. First acquire new belt, compare no of ribs on inside and length next to old. Should be able to eyeball to see if close. Make sure you have a routing diagram or take pix draw one yourself before you take it off if it is too complex to remember. That belt will have at least one tensioner (smooth pulley with a spring) Find a socket that fits the bolt in the middle of that pulley w/long handle. If more than one (possible on long belt) Make life easier and use one nearest top. If on pass side, will probably move right-away from the belt, opposite if on the other side of the car. If moves right use tightening motion on the bolt and should draw pulley to side creating slack in the belt while you do that have helper slip belt off of its top most accessory pulley, then release. If moves left you will have to use a long pry bar instead of pulley bolt since it may loosen pulley bolt before it moves if you are cranking on it counter clockwise. Same procedure pretty much to install. Just put it on almost all the way except last easy to reach pulley and then you move tensioner all the way and hold while helper slips it on. Bump (BUT DO NOT START) engine a few times after install to make sure has dropped into proper place on rib grooves in pulleys if slightly off usually will align itself if slightly off on one (pulley) If looks good run it to check for looseness. If still looks good, you are done.