"Woooo"-ing noise when A/C is on - GM Forum - Buick, Cadillac, Chev, Olds, GMC & Pontiac chat


1992-1999 Series I L27 (1992-1994 SE,SLE, SSE) & Series II L36 (1995-1999 SE, SSE, SLE) and common problems for the Series I and II L67 (all supercharged models 92-99) Including Olds 88's, Olds LSS's and Buick Lesabres Please use General Chat for non-mechanical issues, and Performance and Brainstorming for improvements.

Reply
 
 
 
Thread Tools Search this Thread
Old 07-09-2007, 11:48 PM   #1
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Aug 2004
Location: Chi-Town
Posts: 1,116
Thanks: 0
Thanked 0 Times in 0 Posts
Boreas is on a distinguished road
Default "Woooo"-ing noise when A/C is on

My 96 SSEi:

I hear a humming (sounds like a "wooooo") noise when I turn my A/C on. It seems to go along with the engine'* RPM. When I turn off the A/C, a second later the noise stops. The noise is constant while the A/C system is on. Im wondering if mayby the bearings in my compressor is going bad. I can feel the hum/vibration through the gas pedal.

I took it to a mechanic and he had a listen, and when he did he thought he heard it from the water pump. But it doesn't make sense, since it should be making noise even when the AC is off.

Whats your take?
Boreas is offline   Reply With Quote
Old 07-10-2007, 09:46 AM   #2
DINOSAURUS BOOSTUS

Expert Gearhead
 
BillBoost37's Avatar
 
Join Date: Mar 2005
Location: Enfield, CT
Posts: 41,391
Thanks: 0
Thanked 0 Times in 0 Posts
BillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of lightBillBoost37 is a glorious beacon of light
Default

There is more strain on the belt with the AC engaged. This might be belt only noise...however if you want to get it figured out and know for sure. I would go to Sears and spend $15 on a mechanics stethescope. Head home and be very careful not to touch the belt or moving pullies, and listen to each item. When you hear the whooooing you'll know which item'* bearings are probably getting worn. If you don't hear anything..it'* most likely just belt noise.
BillBoost37 is offline   Reply With Quote
Old 07-10-2007, 09:57 AM   #3
Senior Member
True Car Nut
 
Join Date: Oct 2005
Location: Central Florida
Posts: 7,030
Thanks: 0
Thanked 0 Times in 0 Posts
lash is on a distinguished road
Default

X2 on the mechanic'* stethescope recommendation. They are very inexpensive at Harbor Freight if you have one near you.
lash is offline   Reply With Quote
Old 07-11-2007, 11:17 PM   #4
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Aug 2004
Location: Chi-Town
Posts: 1,116
Thanks: 0
Thanked 0 Times in 0 Posts
Boreas is on a distinguished road
Default

How hard is it to exchange the bearings on the A/C compressor, or does the whole thing have to be replaced?
Boreas is offline   Reply With Quote
Old 07-12-2007, 02:59 PM   #5
Senior Member
Posts like a Northstar
 
Join Date: Jul 2006
Location: Waukesha, Wisconsin
Posts: 547
Thanks: 0
Thanked 0 Times in 0 Posts
Blownville is on a distinguished road
Default

My brother and I just put a new AC compressor clutch on my 95. This includes the bearings that were also making noise on mine. It was not an easy task. I think the hardest part was finding a pulley puller that fit. Lucky for me I know a mechanic that had the one I needed. After removal we had alot of trouble lightly taping the new one on, and getting the hub to fit over. I would not recomend this job. This did fix the problem noise though. Good luck.
Blownville is offline   Reply With Quote
Old 07-12-2007, 04:28 PM   #6
Senior Member
Posts like a Camaro
Thread Starter
 
Join Date: Aug 2004
Location: Chi-Town
Posts: 1,116
Thanks: 0
Thanked 0 Times in 0 Posts
Boreas is on a distinguished road
Default

Thats the thing, im trying to avoid spending $360 on a new compressor just for a bearing after a slew of unexpected expenses and an accident recently.

Looks like ill be looking at just getting a new clutch to avoid pulling/pressing the bearing. Does the freon have to be recovered before replacement?
Boreas is offline   Reply With Quote
Old 07-12-2007, 04:43 PM   #7
Senior Member
Posts like a Turbo
 
Join Date: Jan 2007
Location: New Hampshire
Posts: 260
Thanks: 0
Thanked 0 Times in 0 Posts
b18jason is on a distinguished road
Default

it shouldnt as long as you don't remove the compressor from the vehicle
b18jason is offline   Reply With Quote
Old 07-12-2007, 07:25 PM   #8
Senior Member
Posts like a Northstar
 
Join Date: Jul 2006
Location: Waukesha, Wisconsin
Posts: 547
Thanks: 0
Thanked 0 Times in 0 Posts
Blownville is on a distinguished road
Default

The bearing comes with the clutch assembly. You will have to pull it off with a puller and then reinstall either with a big socket or maybe the puller if it allows for reinstalation. I couldn't find a parts store with the right size puller. Thats where I spent hours looking for one and ended up at a mechanic that I know. You will not lose any Freon unless you disconnect the lines from the compressor. You will not have to disconnect those lines if you just do the clutch assembly.
Blownville is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Well moving to my new Job/shop! Woooo! Turbocharged400sbc Lounge 10 05-10-2005 03:06 AM
Halo, Halo you all Halo'ing? I'm Halo'ing just fine. Allmachtige Lounge 10 11-11-2004 10:58 PM
IT HAS BEGUN!!!! WOOOO HOOOO BonneMeMN Lounge 4 03-04-2004 02:41 PM
some more PW'ing FiReDeViL Your Ride: GM Pictures & Videos 16 08-31-2003 01:28 AM
#*&# ing 3800 series 1 !!!!! delta8t8 1987-1991 17 06-20-2003 12:14 AM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

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 Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 04:16 AM.


We are a participant in the Amazon Services LLC Associates Program, an affiliate advertising program designed to provide a means for us to earn fees by linking to Amazon.com and affiliated sites.