Red Top strange sound around inlet

[kamilp1908]

Hi.
Lately I have a little problem with my SR redtop.
You can hear strange squealing noise on intake side. Could it be injectors or camshaft?
Sorry for poor quality video, I will try to record new one in HD.
[youtube]http://www.youtube.com/watch?v=5fw2j5IhuWA[/youtube]

[kamilp1908]

Here are better quality videos.
Has anybody had such problem, heard similar noise?
[youtube]http://www.youtube.com/watch?v=jn1xVgx0iEY[/youtube]
[youtube]http://www.youtube.com/watch?v=35cLEgjnmQ4[/youtube]
[youtube]http://www.youtube.com/watch?v=C512T-G-2V4[/youtube]

[Lobo240sx]

I'd check for a loose alternator belt if I remember this similar noise too. Could be Power steering pump but it didn't get louder when you revved..

When you did the 3rd video, sounded like it. Having a problem with my PS pump bearings, Undo the Power steering belt and see if the noise goes away. How is your fluid level?

[kamilp1908]

Yesterday I had removed all belts to solve the problem.
1). removed power steer pump belt - still can hear this strange noise
2). removed viscose - still can hear this strange noise
3). removed water pump and alternator belt - no more noise (I couldn't recreate it)
So I think there is a problem with water pump bearings (maybe). I have to replace water pump with new one, because I have a little leakage. Preventively I will buy new water and power steer belt.

[PyR0NiAk]

Yesterday I had removed all belts to solve the problem.
1). removed power steer pump belt - still can hear this strange noise
2). removed viscose - still can hear this strange noise
3). removed water pump and alternator belt - no more noise (I couldn't recreate it)
So I think there is a problem with water pump bearings (maybe). I have to replace water pump with new one, because I have a little leakage. Preventively I will buy new water and power steer belt.

keep us updated

[kamilp1908]

This is how water pomp looks like after engine gets hot, you can see little leakage from it.

[kamilp1908]

Today I have tested water pump bearings with WD40. After 20 minutes of idling and little reving, I could not hear this strange sound. So I decided to drain the coolant and take out the old water pump.
This is how it looks like:





I think that my engine still has had the genuine pump from 1994

[Lobo240sx]

A little Lime and corrosion. Not bad for a 17 year old engine. Keep us updated.

[kamilp1908]

I have new pump. I will probably install it today.

[kamilp1908]

I have tested engine today. New water pump, but this strange noise did not disappear. After 3 revings it appears again and go out on idle. I think that alternator bearings are dying.

[kamilp1908]

New alt bearings and new water pump installed. The noise is still can be heard. I have no idea where is the problem.
I have a theory that injectors are noise source. I think that they are going into some kind of resonance. Maybe they are fitted to tight or to loose. I am creating theory to problem, because I don't have any idea.

[kamilp1908]

Nobody has any idea?

[S-ICHISAN]

did u open valve cover to see if theres any strange wear on the cams

[kamilp1908]

This how cams looked after I have bought engine. It was few months ago, but I didn't make a lot of driving since then. Maybe about 1k km.