('06-'08) Squealing & Burning Smell - Updated! - Subaru Forester Owners Forum
User Tag List

 2Likes
  • 1 Post By 2.5x_sleeper
  • 1 Post By bman400
 
Thread Tools Display Modes
post #1 of 5 (permalink) Old 04-22-2019, 06:08 PM Thread Starter
Forum Member
 
MN_Drew's Avatar
 
Join Date: Aug 2018
Location: Minneapolis, MN
Posts: 5
Car Year: 2006
Car Model: Forester X
Feedback Score: 0 reviews
Squealing & Burning Smell - Updated!

Hi All,

I've got an '06 NA Foz w/ 142,000mi.

A couple months back, a squealing/whining noise developed from the engine bay. It's only audible at idle, and is especially audible at idle on a cold start. My thought was that this is likely one of the pulleys on the accessory belt, but I haven't done much investigation.

Now just in the last couple weeks, a strong burning smell also developed. I checked and I haven't been losing any fluids, so I don't think I have a significant leak somewhere. I thought I might have accumulated spilled oil and ATF (just did a drain and fill a couple weeks back and I hate the placement of that dipstick), and/or misc. crud that could have reached a breaking point and could be causing the burning smell, so I pulled the battery, covered the alternator and distributor, and sprayed the whole engine bay in degreaser and rinsed it down well. No change to the burning smell.

We did the timing belt kit and water pump a bit over two years ago at about 107k. We replaced the accessory belt at that time, but none of the accessory belt pulleys. Head gaskets were done by a prior owner (unsure when). She burns a bit of oil, but not too bad-- maybe 0.5 qt per 1,500mi depending on season and type of driving.

So, any ideas? Am I totally in left field on the accessory belt idea? How would you diagnose the accessory belt, pull it off and compare? Test individual pulleys by seeing how freely they spin without the belt?

Greatly appreciate any advice.

MN_Drew is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 04-22-2019, 06:23 PM
スーパー モデレーター
 
2.5x_sleeper's Avatar
 
Join Date: Aug 2007
Location: Newberg, OR
Posts: 34,511
Car Year: 2007
Car Model: Forester Sports XT
Transmission: 4EAT
Feedback Score: 42 reviews
My guess, a slipping accessory belt for the P/S & alternator. Once the belt heats up, it will stop slipping. Does the burning smell like burning rubber?

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]

jmw15 likes this.

'07 FSXT - COBB Surgeline dyno stock Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
2.5x_sleeper is offline  
post #3 of 5 (permalink) Old 04-23-2019, 03:54 AM
Forum Member
 
Join Date: Nov 2015
Location: Centerville, TN
Posts: 130
Car Year: 2013
Car Model: crosstrek, Forester+
Feedback Score: 0 reviews
I use a 4 foot length of rubber fuel line (3/8" works well) to put one end in my ear and use the other end to listen around in the engine and locate the sound. BE CAREFUL of sticking the hose or your fingers into spinning fans, belts or pulleys.

rustfarmer
[email protected] is offline  
 
post #4 of 5 (permalink) Old 04-23-2019, 07:14 AM
Forum Member
 
Join Date: Jan 2006
Location: DFW
Posts: 309
Car Year: 2001
Car Model: Forester
Garage
Feedback Score: 0 reviews
The idler pulley is the most common thing to go, this pulley is on the belt that drives the AC Compressor. Most likely the bearing on it has seized and the pulley has stopped spinning and therefore causing the squealing and burnt smell.
Miker104 likes this.
bman400 is online now  
post #5 of 5 (permalink) Old 04-26-2019, 08:40 PM Thread Starter
Forum Member
 
MN_Drew's Avatar
 
Join Date: Aug 2018
Location: Minneapolis, MN
Posts: 5
Car Year: 2006
Car Model: Forester X
Feedback Score: 0 reviews
Thanks for the advice everyone.

One thing I did not mention in my first post was that in addition to the squealing on idle, there is also a squealing when accelerating with the RPM over about 3500 or so. I forgot to mention it above because it's not so common and the idea squeal was on my mind.

Anyways, I got into it today and sure enough, the idler pulley on the AC belt was totally trashed. Picked up a Gates replacement and put that on with new a pair of replacement belts. This DID take care of the squealing at idle, but not under at high RPMs under hard acceleration.

Could it be possible that there's a variety of crud on the pulleys-- residue from burning rubber from previously slipping belt, 14 years of accumulated oil, grease, dust, etc. that could be causing the belt to continue to slip at high RPMs? I'm thinking of trying to clean the pulleys tomorrow, take the cover off and spray them down as best I can with a gentle degreaser, let them soak a bit, spray a bit more while idling? Any other ideas?
MN_Drew is offline  
Sponsored Links
Advertisement
 
Reply

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Engine and Exhaust > EJ25 - 2.5L Non-Turbo (1998-2010)

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
('09-'13) Problem w/ Front Wipers (and burning smell) Siori Problems, Maintenance, and Warranty 2 01-21-2018 05:58 AM
('09-'13) Intermittent Burning Smell KTH Problems, Maintenance, and Warranty 4 09-07-2017 04:37 PM
('14-'18) Burning Smell in Reverse joesakic19 Problems, Maintenance, and Warranty 8 09-06-2017 03:55 PM
('03-'05) burning smell when driving up steep hills lubmysubaru Transmission and Driveline 17 06-16-2017 04:29 PM
Burning smell from ventilation system Barry_G Interior and Electronics 2 07-10-2015 04:45 PM

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
Trackbacks are On
Pingbacks are On
Refbacks are Off

 

Title goes here

close
video goes here
description goes here. Read Full Story
For the best viewing experience please update your browser to Google Chrome