('06-'08) AC Compressor making noise - fix or replace ? - Subaru Forester Owners Forum
Subaru Forester Forum
ebay search
Subaru Forester Forum
Go Back   Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty
SubaruForester.org is the premier Subaru Forester Forum on the internet. Registered Users do not see the above ads.
User Tag List

Reply
 
LinkBack Thread Tools Search this Thread Display Modes
Old 06-13-2011, 05:59 PM   #1 (permalink)
Forum Member
Lifetime Supporting Member
 
Legacy's Avatar
 
Join Date: Jun 2006
Posts: 6,073
Location: Ottawa
Car Year: 07
Car Model: Forester XT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Feedback Score: 39 reviews
Default AC Compressor making noise - fix or replace ?

07 XT 5sp

Its been making noise for 2-3 weeks now, tonight I finally was able to get it into the shop and troubleshoot. We pulled off belts (Alt / Pulley / AC ) until the noise went away. The noise BTW sounds almost like a supercharger whine. As soon as the belt for the AC was pulled and the motor started it was nice and quiet again. When I spun the AC wheel with my hand I could kinda hear that high pitch metallic sound .

Subaru tech says to replace, before I do so can these be fixed ? Is there a kit from Subaru ?

And if it can't be fixed how about picking up a used one ? What years Forester AC units do I need ? Can I used an Impreza / WRX / STI AC compressor ? Or is this one of those items I should buy new OEM ?

I was really hoping it was the alternator , such an easy swap.
Legacy is offline   Reply With Quote
Sponsored Links
Advertisement
 
Old 06-13-2011, 06:28 PM   #2 (permalink)
Smooshed FOTY 2011
 
Blue Fox's Avatar
 
Join Date: Oct 2008
Posts: 5,008
Location: Durango, Colorado
Car Year: 2005
Car Model: Forester 2.5 XT
Transmission: 5-Speed MT
Gallery: 0
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Feedback Score: 3 reviews
Default

Before I replaced mine, it sounded very metallic, like metal on metal. It made a squeaky-grinding sound whenever the car was on.......like the bearings or something was shot. I just replaced the A/C compressor with a used one from eBay for $100 bucks and it's been good for over a year now.
__________________
2004 XT - RIP
2005 XT - 5MT - 2" LIFT JOURNAL
Blue Fox is online now   Reply With Quote
Old 06-13-2011, 07:48 PM   #3 (permalink)
Forum Member
 
funkymonkey1002's Avatar
 
Join Date: Jan 2006
Posts: 9,011
Location: Boston
Car Year: 2004
Car Model: 2.5 XT
Transmission: 4eat
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 8 reviews
Default

are you positive its the actual compressor? The A/C belt tensioner tends to go bad and can make a ton of noise just like what you describe, and its pretty hard to pinpoint the sound due to the rad being in the way.

Theres not much that can be done to fix the compressors on newer models, easier/cheaper to just pickup a new/used one. Not sure if the impreza ones are the same, they should be similar on the 2.5L wrx and possibly sti (it would make sense if they used the same one, but I know the power steering pumps are different, so who knows)
__________________
04xt/4eat, 16g, STI bits and bobs
funkymonkey1002 is offline   Reply With Quote
Old 06-14-2011, 04:03 AM   #4 (permalink)
Forum Member
Lifetime Supporting Member
Thread Starter
 
Legacy's Avatar
 
Join Date: Jun 2006
Posts: 6,073
Location: Ottawa
Car Year: 07
Car Model: Forester XT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Feedback Score: 39 reviews
Default

The tech (Subaru mechanic) did the diagnostic last night. He had his scope but even with that we didn't know until he pulled the belt for the AC.

How could you tell if its the tensioner and not the AC unit itself ?

And that's the million dollar question: How do I find out which AC compressors are compatible with my 2007 XT ?
Legacy is offline   Reply With Quote
Old 06-14-2011, 10:54 AM   #5 (permalink)
Forum Member
 
neoshi's Avatar
 
Join Date: Jan 2006
Posts: 8,476
Location: 949 The OC/The City 415
Car Year: 05
Car Model: XSsss..
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 1 Post(s)
Feedback Score: 32 reviews
Default

I'm having the same prob :( but have been ignoring it for a while.

I've been going to opposedforces.com, pulling the PN on the compressor and when you click on the PN, it'll also pull up all the other subies that run it and their MYs. I should really get it fixed...
__________________
05 XS
neoshi is offline   Reply With Quote
Old 06-14-2011, 02:12 PM   #6 (permalink)
Forum Member
Lifetime Supporting Member
Thread Starter
 
Legacy's Avatar
 
Join Date: Jun 2006
Posts: 6,073
Location: Ottawa
Car Year: 07
Car Model: Forester XT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Feedback Score: 39 reviews
Default

How long has yours been making noises ?
Legacy is offline   Reply With Quote
Old 06-14-2011, 06:44 PM   #7 (permalink)
Forum Member
Lifetime Supporting Member
Thread Starter
 
Legacy's Avatar
 
Join Date: Jun 2006
Posts: 6,073
Location: Ottawa
Car Year: 07
Car Model: Forester XT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Feedback Score: 39 reviews
Default

Took this video today, can clearly see the sound goes away when the ac clutch engages and comes back when it disengages. Now how do I tell if this is the clutch or the compressor that is the problem ?


Legacy is offline   Reply With Quote
Old 06-14-2011, 06:55 PM   #8 (permalink)
Forum Member
Lifetime Supporting Member
 
2.5x_sleeper's Avatar
 
Join Date: Aug 2007
Posts: 19,766
Location: Newberg, OR
Car Year: 2007
Car Model: Forester Sports XT
Transmission: 4EAT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 42 Post(s)
Feedback Score: 39 reviews
Default

Take a listen to the video on this post. Different, but the first part has a similar sound.

Bobby...

['07 FSXT MODding Journal] ['03 X MODding Journal]
__________________
'07 FSXT - COBB Surgeline dyno Protune - Stage 1+
'03 X +AVO turbo kit = XT (son's)
'95 Neon Sport
2.5x_sleeper is offline   Reply With Quote
Old 06-14-2011, 07:22 PM   #9 (permalink)
Smooshed FOTY 2011
 
Blue Fox's Avatar
 
Join Date: Oct 2008
Posts: 5,008
Location: Durango, Colorado
Car Year: 2005
Car Model: Forester 2.5 XT
Transmission: 5-Speed MT
Gallery: 0
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 55 Post(s)
Feedback Score: 3 reviews
Default

Easiest way to see if it's the A/C tensioner (which can change pitch as the A/C turns on because the load is increased) is to take off that bracket that holds on the A/C tensioner pulley. It should turn smooth with a little resistance, but not much. If it feels awkward, or spins with a grind then replace it (should be about $20 bucks).

But other than that, it sounds VERY much like mine did before it started to make a huge ton of racket, and mine ended up being the A/C compressor. But making sure it's the pulley is a must as it could be the difference between paying for a $20 fix or a potentially $500 fix.
__________________
2004 XT - RIP
2005 XT - 5MT - 2" LIFT JOURNAL
Blue Fox is online now   Reply With Quote
Old 06-14-2011, 07:22 PM   #10 (permalink)
Super Moderator
 
jgrote's Avatar
 
Join Date: Aug 2009
Posts: 4,869
Location: Denver, CO
Car Year: 2004
Car Model: Forester
Transmission: 4EAT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 29 Post(s)
Feedback Score: 3 reviews
Default

Can you try to blow the crud out of the clutch? It sounds like noise in the clutch, not so much the bearings. It could be just that the bearings are quieter under load, but our clutches are known for be a little problematic. You could probably buy just a clutch, but after the labor for installing it, you'll be better off just getting a new(er) compressor. Don't forget to replace the dryer if the system needs to be opened up.
__________________
04 X a/t
00 L a/t w/ 202K!
jgrote is offline   Reply With Quote
Old 06-15-2011, 04:34 AM   #11 (permalink)
Forum Member
Lifetime Supporting Member
Thread Starter
 
Legacy's Avatar
 
Join Date: Jun 2006
Posts: 6,073
Location: Ottawa
Car Year: 07
Car Model: Forester XT
Gallery: 0
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 17 Post(s)
Feedback Score: 39 reviews
Default

I'll try the tensioner thing but it looked like it came off easily when it was removed on Monday night. He used an air rachet so it was hard to hear if it made any noise itself.

Now I should say: I did degrease the motor the night before if that has any relation to this noise. I wonder if I washed some crud into the clutch. I didn't spray hard , more gentle spray trying not to force water into anywhere. Would using compressed air out of a tire inflator nozzle be enough to blow anything loose ?

Its interesting that Subaru sells a clutch for this yet there's next to no info about replacing the clutch only.

Also, from the research I've done this compressor is supposed to fit 02-07 Foresters and 08+ are somehow different.
Legacy is offline   Reply With Quote
Old 06-15-2011, 06:09 AM   #12 (permalink)
Forum Member
 
2cam16's Avatar
 
Join Date: Jul 2007
Posts: 1,360
Location: Peninsula in the Bay Area
Car Year: 2001
Car Model: Forester S
Transmission: 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Feedback Score: 1 reviews
Default

I have almost the same exact noise and it only started after I washed the engine bay. I haven't had a chance to explore yet. I'm curious to find out what your findings are.
__________________
-Rob-
'01 S Sedona Red Pearl
2cam16 is offline   Reply With Quote
Old 06-15-2011, 07:22 AM   #13 (permalink)
Forum Member
 
higgledy's Avatar
 
Join Date: Jan 2006
Posts: 970
Location: Frederick, MD
Car Year: 2006
Car Model: Forester 2.5X 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by Legacy View Post
I'll try the tensioner thing but it looked like it came off easily when it was removed on Monday night. He used an air rachet so it was hard to hear if it made any noise itself.

Now I should say: I did degrease the motor the night before if that has any relation to this noise. I wonder if I washed some crud into the clutch. I didn't spray hard , more gentle spray trying not to force water into anywhere. Would using compressed air out of a tire inflator nozzle be enough to blow anything loose ?

Its interesting that Subaru sells a clutch for this yet there's next to no info about replacing the clutch only.

Also, from the research I've done this compressor is supposed to fit 02-07 Foresters and 08+ are somehow different.
At the bottom of this thread is a link to clutch installation instructions. AC Compressor making noise - fix or replace ?
higgledy is offline   Reply With Quote
Old 06-15-2011, 07:24 AM   #14 (permalink)
Forum Member
 
higgledy's Avatar
 
Join Date: Jan 2006
Posts: 970
Location: Frederick, MD
Car Year: 2006
Car Model: Forester 2.5X 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Default

Quote:
Originally Posted by Legacy View Post
07 XT 5sp

Its been making noise for 2-3 weeks now, tonight I finally was able to get it into the shop and troubleshoot. We pulled off belts (Alt / Pulley / AC ) until the noise went away. The noise BTW sounds almost like a supercharger whine. As soon as the belt for the AC was pulled and the motor started it was nice and quiet again. When I spun the AC wheel with my hand I could kinda hear that high pitch metallic sound .

Subaru tech says to replace, before I do so can these be fixed ? Is there a kit from Subaru ?

And if it can't be fixed how about picking up a used one ? What years Forester AC units do I need ? Can I used an Impreza / WRX / STI AC compressor ? Or is this one of those items I should buy new OEM ?

I was really hoping it was the alternator , such an easy swap.

Did the tech give you a quote on replacing the compressor? I am having a similar issue where my compressor may need to be replaced. I stopped at an independent shop and got an informal quote of $750, but I an thinking that is low.

Thanks for any advice.
higgledy is offline   Reply With Quote
Old 06-15-2011, 07:27 AM   #15 (permalink)
Forum Member
 
higgledy's Avatar
 
Join Date: Jan 2006
Posts: 970
Location: Frederick, MD
Car Year: 2006
Car Model: Forester 2.5X 5MT
Gallery: 0
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Feedback Score: 0 reviews
Thumbs up

Quote:
Originally Posted by neoshi View Post
I'm having the same prob :( but have been ignoring it for a while.

I've been going to opposedforces.com, pulling the PN on the compressor and when you click on the PN, it'll also pull up all the other subies that run it and their MYs. I should really get it fixed...
opposedforces.com is a sweet site. Thanks for sharing.
higgledy is offline   Reply With Quote
Sponsored Links
Advertisement
 
Reply

  Subaru Forester Owners Forum > Technical Forums and Vehicle Assistance > Problems, Maintenance, and Warranty

Thread Tools Search this Thread
Search this Thread:

Advanced Search
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
Trackbacks are On
Pingbacks are On
Refbacks are On



All times are GMT -8. The time now is 02:55 PM.



Powered by vBulletin® Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Content Relevant URLs by vBSEO 3.6.0
User Alert System provided by Advanced User Tagging v3.1.0 (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.