Welcome to the North American Subaru Impreza Owners Club Wednesday March 4, 2015
Home Forums WikiNASIOC Products Store Modifications Upgrade Garage
NASIOC
Here you can view your subscribed threads, work with private messages and edit your profile and preferences Home Registration is free! Visit the NASIOC Store NASIOC Rules Search Find other members Frequently Asked Questions Calendar Archive NASIOC Upgrade Garage Logout
Go Back   NASIOC > NASIOC Technical > Service & Maintenance

Welcome to NASIOC - The world's largest online community for Subaru enthusiasts!
Welcome to the NASIOC.com Subaru forum.

You are currently viewing our forum as a guest, which gives you limited access to view most discussions and access our other features. By joining our community, free of charge, you will have access to post topics, communicate privately with other members (PM), respond to polls, upload content and access many other special features. Registration is free, fast and simple, so please join our community today!

If you have any problems with the registration process or your account login, please contact us.
* Registered users of the site do not see these ads.
Reply
 
Thread Tools Display Modes
Old 08-04-2012, 12:40 AM   #1
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: deRpression hurts
Vehicle:
2003 Outback 2.5
1993 Dakota 3.9 4wd

Default High-pitched squeal when really getting on the throttle

I've got a squeal coming from someplace in the engine compartment of my 1999 Impreza Outback 2.2L. Car has 260k miles on it. In normal driving, the squeal is not present, but if you go close to WOT above ~3000rpm, it begins a high pitched squeal. If you ease off the gas it stops. The squeal is present in every gear. It does not squeal if you rev it in neutral. I tried to get a video clip of it, but the squeal was totally obscured by my exhaust leak and the engine noise.

I first checked the accessory belts, which are brand new from the timing install a couple weeks ago. Along with the belts, all of the timing components and the water pump were replaced. The belts needed to be tightened, but after tightening them, the squeal is still there just the same. This is effectively the first time I have driven this car, so I can't relate before/after.

Now, I've narrowed it down to the clutch. I know the clutch is pretty well toasted. It has at least 180k on it because it was not replaced by the PO, but it could have up to 260k if it was not replaced during the original owner's ownership. The throwout bearing whines a little bit when the clutch is disengaged, but other than that, the clutch works well with no slipping.

So, I guess what I want to know is...in a sad clutch, is it common for the pilot bearing or throwout bearing (I don't think it could be the TO bearing because this is with the clutch fully engaged...) to squeal at higher RPMs when close to WOT? Like I said, it does not squeal when close to WOT at lower RPMs, nor does it squeal if it's at high RPMs with light throttle.
* Registered users of the site do not see these ads.
tibug is offline   Reply With Quote
Old 08-04-2012, 08:24 AM   #2
Uncle Scotty
Scooby Guru
 
Member#: 16200
Join Date: Mar 2002
Vehicle:
OK Houston
we have an Uncle

Default

belt slipping maybe
Uncle Scotty is offline   Reply With Quote
Old 08-04-2012, 12:14 PM   #3
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: deRpression hurts
Vehicle:
2003 Outback 2.5
1993 Dakota 3.9 4wd

Default

Quote:
Originally Posted by Uncle Scotty View Post
belt slipping maybe
I don't think so...I tightened both of the accessory belts already. They did need to be tightened, but there was zero effect on the squeal afterwards.
tibug is offline   Reply With Quote
Old 08-04-2012, 09:11 PM   #4
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: deRpression hurts
Vehicle:
2003 Outback 2.5
1993 Dakota 3.9 4wd

Default

Today I noticed that rev-matching between downshifts it does the same squeal. Only briefly, for a fraction of a second. Specifically, it squeals when the clutch is in and the RPMs increase to around 3000 or so. I'm not sure if this is a new thing (I usually downshift by letting the clutch out slow rather than rev-matching...I'm lazy), but it's happening now so eh.

Sorry guys, I know this is totally vague. It would help so much if I got a video. Maybe I'll try and get one tonight and see if I can isolate the sound.
tibug is offline   Reply With Quote
Old 09-02-2012, 08:26 PM   #5
detpilot
Scooby Newbie
 
Member#: 260446
Join Date: Oct 2010
Location: Ypsilanti, MI
Vehicle:
2006 Impreza 2.5i
Silver

Default

Hey, I've got a similar problem- 2006 impreza 2.5i. I was in the process of checking my belts, when I decided to have my girlfriend rev so I could listen for the noise. Well, surprisingly, it is coming from the exhaust. Only happens at rapid engine acceleration, close to WOT.
detpilot is offline   Reply With Quote
Old 09-02-2012, 09:07 PM   #6
whiteimpreza1
Scooby Newbie
 
Member#: 259680
Join Date: Oct 2010
Chapter/Region: NESIC
Location: Northwest, CT
Vehicle:
06 2.5i impreza
Aspen white.

Default

do any of you have uel headers?
whiteimpreza1 is offline   Reply With Quote
Old 09-02-2012, 09:41 PM   #7
detpilot
Scooby Newbie
 
Member#: 260446
Join Date: Oct 2010
Location: Ypsilanti, MI
Vehicle:
2006 Impreza 2.5i
Silver

Default

No, I'm bone stock.
detpilot is offline   Reply With Quote
Old 10-01-2012, 07:23 PM   #8
wskboarderx
Scooby Newbie
 
Member#: 333247
Join Date: Sep 2012
Default

I have a 2006 2.5i with the same issue. Hard acceleration squeals, conservative driving does not. My serp belt is tight, could it be the timing belt?

It also has a new clutch so I dont think it is related to that.
wskboarderx is offline   Reply With Quote
Old 10-02-2012, 09:11 AM   #9
Aaron'z 2.5RS
Scooby Guru
 
Member#: 1026
Join Date: Mar 2000
Chapter/Region: MWSOC
Location: Hickigan
Vehicle:
'00 RS/WRX Stg5
'98 RS Stock

Default

Sounds like clutch... most likely the pilot bearing.. I mean with those miles, you need a clutch anyway... I bet the TOB and/or pilot bearing are toast..
Aaron'z 2.5RS is offline   Reply With Quote
Old 10-03-2012, 12:22 AM   #10
detpilot
Scooby Newbie
 
Member#: 260446
Join Date: Oct 2010
Location: Ypsilanti, MI
Vehicle:
2006 Impreza 2.5i
Silver

Default

I had someone rev it, and stood outside listening. It sounds like it's coming from the exhaust pipe... maybe a small crack or something? From outside, it's more of a whistle. Give that a try.
detpilot is offline   Reply With Quote
Old 10-03-2012, 12:27 AM   #11
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: deRpression hurts
Vehicle:
2003 Outback 2.5
1993 Dakota 3.9 4wd

Default

Quote:
Originally Posted by detpilot View Post
I had someone rev it, and stood outside listening. It sounds like it's coming from the exhaust pipe... maybe a small crack or something? From outside, it's more of a whistle. Give that a try.
That is what I've narrowed mine down to-a weird exhaust leak. It doesn't happen with normal driving; it only happens when I really get on it.

I do not believe any longer that is the clutch or any clutch parts making this noise, but I do plan on replacing the clutch because it does need it.
tibug is offline   Reply With Quote
Old 11-19-2014, 11:22 AM   #12
ShiftMaster21
Scooby Newbie
 
Member#: 406667
Join Date: Nov 2014
Default follow up

hey ik this post is old but i am having the same problem with my 07 impreza and have also narrowed it down to the exhaust jw if you have found the exact exhaust part. i wondered about about a moisture drain in the muffler or a loose clamp. thanks
ShiftMaster21 is offline   Reply With Quote
Old 11-21-2014, 12:55 AM   #13
tibug
Scooby Specialist
 
Member#: 273906
Join Date: Feb 2011
Chapter/Region: NESIC
Location: deRpression hurts
Vehicle:
2003 Outback 2.5
1993 Dakota 3.9 4wd

Default

Sorry, I sold the car without doing anything to it. If it's an '07 I'd hope it wouldn't have an exhaust issue.
tibug is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 07:44 PM.


Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2015, Jelsoft Enterprises Ltd.
Powered by Searchlight © 2015 Axivo Inc.
Copyright ©1999 - 2014, North American Subaru Impreza Owners Club, Inc.