how do i replace the alternator belt?

[SilviaSR20DET]

Hey guys, apparently my alternator belt is torn and about to snap in any minute so does anyone know how to replace the belt? I know that you have to take off the powersteering pump belt first to get to the alternator belt im stuck on how to take off both. any help will be awesome!

[slider2828]

On each thing there is a tensioner for the entire pump, pully, etc.... Just loosen the screw for the tensioner, the belt goes slack and remove it....

[japslapsilvia]

seriously??

ok

loosen the tensioner at the p/s pump

remove belt

loosen the tensioner at the alt.

remove belt

install in reverse order.

[slider2828]

Hey Ima about to do a alternator swap SR to KA, is it hard to remove that alternator pulley?

[n240sxfnatic]

Hey Ima about to do a alternator swap SR to KA, is it hard to remove that alternator pulley?
No, U pretty much NEED an impact gun though

[japslapsilvia]

Hey Ima about to do a alternator swap SR to KA, is it hard to remove that alternator pulley?

nice thread jack!!

no its not hard use an impact gun.

OR

with it on the motor and tension still on the belt u may be able to break the nut loose.

[blackrms13]

check out the maintenance section of the FSM
its all in there

[SilviaSR20DET]

Yeah i removed the tension bolt or loosened it on both the pump and alternator and the belt didnt come lose enough to remove it.. am i missing something?

[japslapsilvia]

when u loose the tensioner bolts you will notice that there is a "slot" in the bracket for the pump, and alt, to move, you will also notice another nut there, loosen that nut and the pump/alt will move.

[MudRacer]

sometimes the alternator or the PS pump get stuck in their position, you might have to loosen the bolts that hold the alternator/ps pump on the bracket..

That should allow it to move freely.

[SilviaSR20DET]

oh okay that makes more sense now, ill give it a shot. Thanks!

[surreybc]

If you dont have Hicas, I think you only have to back off tension bolt and loosen tension nut to get power steering belt off.

Intro
loosen idler pulley, power steering pump and alternator as described below. Belts will slip over fan. i did it blade by blade and rotated fan.
Procedure
1. Loosen Power steering pump and push down on pump to loosen belt. Pushing the pump towards passenger side tightens belt. There is one 14 mm nut and one 14 mm bolt to loosen as seen in picture.

http://img246.imageshack.us/img246/5813/zafk7.jpg (http://imageshack.us)


The following picture is for interest only. It shows the tensioning mechanism
removed from p/s pump. DO NOT REMOVE.
http://img222.imageshack.us/img222/6374/zbux5.jpg (http://imageshack.us)

2. Loosen the Alternator:
(use 6 inch extention and can you do it without removing fan and shroud?
There is a 14mm bolt at bottom(alternator pivots on this bolt) and the two 14mm bolts associated with tensioner at top. The bottom bolt(pivot bolt) and the bolt that locks tensioner(tensioner bracket is part of engine) to alternator , face front of car. The bolt used to adjust tension is accessed from passenger side of car. The bottom bolt(pivot) and bolt that locks tensioner must be loosened. The long tensioner bolt will have to be backed off , too. You may still need a wooden pry bar or rubber mallet to move alternator towards driver side of car.(this loosens the belt). Make sure long adjusting bolt is backed off or you wont be able to move alt.
ALTERNATOR:
-belt deflection with engine cold mm(inches)
.....max limit 11 (0.43)
.....adjusting used belt 7-8 (0.28-0.31)
.....new belt 6-7 ( 0.24-0.28)
pivot
http://img220.imageshack.us/img220/5534/img0023mediumzn7.jpg (http://imageshack.us)
top of alt
http://img147.imageshack.us/img147/5089/img0026mediumar1.jpg (http://imageshack.us)
3.idler pullye if you have air conditioning
http://img135.imageshack.us/img135/2186/img0021ec1.th.jpg (http://img135.imageshack.us/my.php?image=img0021ec1.jpg)


Belt deflection specs:
7mm or .25 inch is pretty good
more detail:
1991-1994 240sx: Specifications and capacities tutorial: Nissan Online Mechanic: Nissan Forums / Infiniti Forums - NICOclub (http://forums.nicoclub.com/zerothread?id=255910)
Measuring deflection: push belt in with thumb. push in at center of belt. ie between the two pulleys. needs picture. I just used a toothpick with .25 inch marked off and held it vertically as i depressed belt. other wise use two rulers.
http://img135.imageshack.us/img135/2186/img0021ec1.th.jpg (http://img135.imageshack.us/my.php?image=img0021ec1.jpg)

[surreybc]

can you get the bottom alternator bolt from underneath car(with engine bottom cover removed)??

[Vision Garage]

Wow. This needed clarity?

[FRoSt415]

HAHA^^^^^. This Reminds me of my Team Integra forum DAys.... they have a DIY for everything, even like changing the oil!!!

[jinxtacy]

Thanks for the write up. I was going crazy looking for the tensioning mechanism on the PS pump and found that it just has a bolt along the slider section and pivot bolt. Looks like I'll have to come back and fix that when time allows for it. Thanks again.