SR20DET loud squealing noise

[supra33202]

I have a 1996 SR20DET Blacktop.

The noise seems to come from:

1) Water pump/belt
2) Alternator belt
3) Power steering pump/belt

The squealing noise happens every 15-30 min and lasts for about 1-3 min. If I maintained about 1500 rpm when the car was idled, the noise seemed to go away quicker.

Please see the video.

http://www.youtube.com/watch?v=nx_K1TtgQ7A

The noise started from 0:06 and ended at 0:37.

I put some WD-40 on the bearings for power steering pump and water pump already, but the noise is still there.

Do you have any suggestions/comments?

Thanks!

[Philipio]

Make sure your belts are properly tightened and no fluid of any kind of making its way onto a belt.

Are any of the belts old or worn out? Obviously that could cause it too.

[srpowered240sx]

belts or pulleys, sounds like the water pump pulley. crank those four nuts down good.

[supra33202]

It seems like the squealing noise comes from the loose belt from the alternator. I tightened the alternator belt via the tension bolt. After 20 min of hard driving, the squealing noise happened again and the alternator belt kind of loose again. I re-tightened it again and noise disappeared, and after 20 min of hard driving, the noise happened again.

So how would you fix that?

Should I take out the tension bolt and replace the flat washer with a spring washer? Do you know the size of the tension bolt for the alternator?

I have S14 SR20DET.

Thanks!

[badbob2121]

so the tension bolt is loosening while you drive? or its in the position, just the belt is loose again? im confused...

[supra33202]

The alternator belt is loose.

[supra33202]

http://www.oreillyauto.com/site/c/detai ... ead+locker

Will Threadlocker work for my application?

[driftneil]

Did you tighten the lock nut on the tension arm?

[supra33202]

http://yfrog.com/9e91nissan240sxalternatorj

I don't think there a alternator diagram on S14 SR20DET manual.

But S13 240SX manual should be very similar.

The lock nut that you were talking is at the right side of the "adjusting bolt", right?

I didn't touch that bolt, and it seems like it is very tight already. But I will try to tighten the 14mm bolt as well.

[driftneil]

Im talking about the nut on the front of the adjusting arm....

[supra33202]

Do you have a picture?

I am not sure which adjusting arm you are talking about.

[driftneil]

The bolt that you tighten the alternator belt with goes thru the adjusting arm, if you look in front of the arm there is a 14mm bolt.