High pitch noise coming fron engine...


JasonYo

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Nov 20, 2008
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Hey all, so I have been a member here for a little while and I browse the forums regularly but never made a post. I figured I would ask this question here since I've been having a hard time with this, I'm trying my luck on my different forums now.

Anyways, when my engine is warm and only at idle it starts to make this high pitch whistling/squeaking noise, it seems to be coming from the alternator area but it also resonates in the engine bay and can sound like its coming from different places.

I know that it's not the alt belt, ps belt, timing belt tensioner, intake, or any hose on the intake manifold.

Heres a video to see what it sounds like. You can hear it really well towards the end.

YouTube - B16a high pitch noise



Any input is appreciated!
 

Last edited:

abunai888

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Mar 12, 2009
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1,955
is a special tool like the doctors headrings or use a screw driver and try to hear from were the sound comes.

i think is something loose
 



JasonYo

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Nov 20, 2008
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Well I did listen for the noise, it's pretty much from the alternator area, and I even ran the engine with the alt belt off.

What else is back there?
 


Darragh

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Oct 16, 2008
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it sounds nearly like 2 pieces of metal are touching , like off the alternator adjustment bracket or off the strut brace causing a high pitch ringing...

Did you do anything recently like a service?
 


JasonYo

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Nov 20, 2008
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Well I did run the engine for a bit with the alt belt off, so i dont think its that.

What I first gotta figure out is if it's a air leak, or bad bearings or metal rubbing.

nothing that moves is touching the strut bar. This actually happened after i got my timing belt/water pump changed. But I took it back to the guy and he re did the job with new parts and nothing changed.


arggg, so frustrating! :mad:
 


Darrenb

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Jan 12, 2010
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check the air con pump the clutch on it prob came loose take belt off and hold your hand on the air con pully see if it is rattling up and down
 


JasonYo

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Nov 20, 2008
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Well I don't have a/c.


Is it possible that it's the intake manifold gasket or something? has a leak?
 


Darragh

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Well I did run the engine for a bit with the alt belt off, so i dont think its that.

What I first gotta figure out is if it's a air leak, or bad bearings or metal rubbing.

nothing that moves is touching the strut bar. This actually happened after i got my timing belt/water pump changed. But I took it back to the guy and he re did the job with new parts and nothing changed.


arggg, so frustrating! :mad:
No wasnt saying it was the alternator bearing as you said you took it off but 2 pieces of metal vibrating together in that area...

Well seeing it happened after the t/b was done id say the belt could be over tensioned and as the head/block expand its putting strain on a bearing/journal ,
could say the same for the alt/ ps but you said you removed the belts...
 



EK9turbo

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Jan 17, 2008
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timing belt too tight, cam journals on belt end grinding at idle when theres less oil pressure. Not good. Get the belt tensioned properly.
 




JasonYo

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Nov 20, 2008
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Hmm, I'll check the ps fluid. But wouldn't it only make a noise when I turn?
 



JasonYo

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Nov 20, 2008
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Ok, well I'll try adding some as soon as I can then. That would be quite a simple fix! But I have a feeling it may be something else. Wouldn't hurt to try tho.
 


H22CB7

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Jul 9, 2013
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Hey did you ever figure out what was making the high pitch noise? sounds exactly like what my h22 is doing,, almost identical. any help would be appreciated, thanks.
 


Cap111

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Joined
Feb 20, 2020
Messages
3
Car(s)
97Honda Accord
Hey all, so I have been a member here for a little while and I browse the forums regularly but never made a post. I figured I would ask this question here since I've been having a hard time with this, I'm trying my luck on my different forums now.

Anyways, when my engine is warm and only at idle it starts to make this high pitch whistling/squeaking noise, it seems to be coming from the alternator area but it also resonates in the engine bay and can sound like its coming from different places.

I know that it's not the alt belt, ps belt, timing belt tensioner, intake, or any hose on the intake manifold.

Heres a video to see what it sounds like. You can hear it really well towards the end.

YouTube - B16a high pitch noise



Any input is appreciated!
It's been a while did you figure this ou
 


Cap111

New Member
Joined
Feb 20, 2020
Messages
3
Car(s)
97Honda Accord
Hey did you ever figure out what was making the high pitch noise? sounds exactly like what my h22 is doing,, almost identical. any help would be appreciated, thanks.
Did you figure out what the noise is? I just put a jdm engine from eBay in my Honda Accord and same noise... It's not a.belt, and happens once car is warm and only at idle.
 


firebass

Member
Joined
Aug 15, 2010
Messages
240
i had a similar noise the last week and my engineer adviced to make 1 test, to press the clutch and check if it stops, and when i pressed it stopped this noise so it was the bearing from the clutch, i just left it like cz he adviced me not to waste money just to grease this a little :)
 


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