Go Back   LS1TECH > CHASSIS, SUSPENSION, APPEARANCE > General Maintenance & Repairs
Sign in using an external account
Register Forgot Password?
Register iTraderTimeslips Photos Members Search Today's Posts Mark Forums Read Used CarsVendor Directory
Search

General Maintenance & Repairs
Leaks | Squeaks | Clunks | Rattles | Grinds
Sponsored by
Gearstar Performance Transmissions

Welcome to LS1Tech.com!
Welcome to LS1Tech.com.

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, at no cost, 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, join LS1Tech.com today!


Reply
 
Thread Tools Search this Thread
Old 07-10-2009, 07:03 AM   #21
Launching!
1999 Chevrolet Camaro
My Garage
 
mikedamageinc's Avatar
 
Trader Rating: 33
Join Date: Jun 2009
Location: VA
Posts: 267
Default

I have a new clutch and bearing I was going to put on but the nut on the compressor shaft is round with a notch in it like a keyway and nobody seems to know what type of socket to use, anyone have an idea?
__________________
1999 SS M6 Full bolt on's, Frost tune - 270K+ autox'er/daily driver
1997 Toyota Land Cruiser - Lifted, Locked, and Armored - 170K and just getting broken in!
mikedamageinc is offline   Reply With Quote
Old 07-10-2009, 08:12 AM   #22
TECH Enthusiast
Garage is empty, add now
 
99monguse's Avatar
 
Trader Rating: 0
Join Date: Jan 2007
Location: OHIO
Posts: 715
Send a message via Yahoo to 99monguse
Default

Quote:
Originally Posted by Giggity View Post
Just picked up a 02' Z28 A4. The car has been very well maintained but it had been sitting for almost a year before I bought it.

When the A/C is *off*, there is constant noise coming from the compressor clutch. I guess you could say it almost sounds like a hiss. The sound goes away immediately after I turn on the A/C and of course the sound returns when I turn the A/C off.

I'm not familiar with the operation of the clutch, could I damage anything by simply spraying some lubricant right into the front of the clutch?
My 99 SS does the same exact thing; makes a faint noise when the AC is off and as soon as I turn the AC on the noise stops. I think its the clutch since soon as it activates the noise stops. Is it hard to replace these? I don't have to remove the compressor do I?
__________________
http://www.ls1tech.com/forums/image....ine=12044347021999 Camaro SS M6-Agostino stage 2 H/C 226/234/112 cam. Grotyohann 1.75 headers, 3" y-pipe, SLP Dual Dual. Ram 6130 clutch, Moser 12 bolt-4.10, 33 spline axles, 315s w/ 17x11 ZR1 420rwhp

1998 Z28 A4- 3.23 gears, Borla exhaust, EFIALCHEMY TUNED

2001 Suburban 1500 4wd
99monguse is offline   Reply With Quote
Old 07-10-2009, 07:54 PM   #23
On The Tree
2002 Chevrolet Camaro
My Garage
 
Giggity's Avatar
 
Trader Rating: 0
Join Date: Jun 2009
Location: Derry, NH
Posts: 142
Default

So I went and picked up the A/C Clutch Bearing today, it was like $20 bucks. I also borrowed a "A/C Clutch Puller". I obviously want to do this without breaking the refrigerant lines open so this is what did.

Removed the belt.

Removed the 4 bolts holding the compressor to the bracket.

Dropped the Sway bar.

Doing those 3 things I was able to pull the compressor down and out of the way enough to get the Clutch pulley puller onto it. Well the puller they gave me was only a 2 jaw and I could not get the damn thing to stay on the pulley. I will try it again with a 3 jaw puller tomorrow. For now I put everything back together minus the belt so it's at least silent for now!

But yes, you definitely need a tool to pull the clutch off the compressor and it seems like you should be able to do it without taking off the refrigerant lines. I will find out if another tool is needed for the bearing tomorrow or Sunday.
Giggity is offline   Reply With Quote
Old 09-04-2009, 04:08 PM   #24
DF
Teching In
Garage is empty, add now
 
Trader Rating: 0
Join Date: Aug 2002
Location: Ventura County
Posts: 30
Default

Giggity,

did you need to do anything to get the bearing off? Was the culprit the bearing in the AC compressor pulley?

I think I have the same problem that you had: hi pitch squeel at 2000+ rpm coming from the compressor. no squeel at idle. Although I do get the squeel when the AC is on as well.

Ive seen two items at the auto parts store (rockauto.com): 1. AC Condenser pulley bearning alone and 2. the pulley/bearing assembly. of course the pulley/bearing assembly is much more expensive. Id like to just replace the bearing. Can I take out the bearing out of my original pulley and replace just the bearing?

TIA
__________________
2K NMB HT SS
Suspension, lid, Me.

Last edited by DF; 09-04-2009 at 04:31 PM..
DF is offline   Reply With Quote
Old 11-15-2009, 08:55 PM   #25
On The Tree
Garage is empty, add now
 
Trader Rating: 8
Join Date: Jan 2005
Posts: 160
Default

Alright, here is my attempt at a write up. You will need your standard sockets and wrenches, screwdrivers, BFG or press, Snap ring pliers. Specialty tools include are the clutch plate puller kit.

Click the image to open in full size.

Click the image to open in full size.

And the AC Pulley/Hub puller

Click the image to open in full size.

First clean the threads on the inside of the clutch plate out nicely so the puller can be installed.

Click the image to open in full size.

Thread in the correct size puller tool and remove the clutch plate.

Click the image to open in full size.

I decided to replace the clutch plate on mine because it looked fairly worn. As I suspected this was the source of the dragging noise I heard. After this was removed, the pulley spun freely without noise. But I chose to proceed with replacing the bearing

Click the image to open in full size.

(worn clutch plate)

Click the image to open in full size.

Once the clutch plate is out, remove the snap ring that holds the A/C compressor pulley in place.

Click the image to open in full size.

Set the pulley puller up on the A/C compressor pulley and remove the pulley.

Click the image to open in full size.

Click the image to open in full size.

Click the image to open in full size.

Use a Press or Hammer and other appropriate tool to remove the bearing from the puller. I had two options, the first being a large socket and the other is my custom made crank pulley install tool. The bearing comes out the front of the pulley.

Click the image to open in full size.

Click the image to open in full size.

There are several tangs on the front of the pulley that are there to hold the bearing in, they will be flattened out by the removal process.

Click the image to open in full size.

Now use the press/BFH and appropriate tool to install the new bearing in the pulley. It should be pressed in until it bottoms out. The A/C compressor pulley can now be reinstalled on the compressor. Mine did not take much force to reinstall and I used a rubber mallet to tap it back onto the compressor. If yours does not go on freely, you could probably use the clutch plate install tool and large washer to press it on. Then reinstall the snap ring.

In order to proceed with installing the clutch plate, there is a key that needs to be removed from the clutch plate

Click the image to open in full size.

Use a hammer and punch (or durable screwdriver) to remove this key from the clutch plate.

Click the image to open in full size.

Install the key in the slot on the shaft of the compressor

Click the image to open in full size.

Make sure the threads on the end of the compressor shaft are clean. Set the clutch plate (old or new) on the shaft so the keyway lines up with the key on the shaft. Assemble the clutch plate install tool and thread it onto the shaft of the compressor.

Click the image to open in full size.

Tighten the clutch plate down onto the compressor until there is .020-.030 between the clutch plate and the AC compressor pulley. Less clearance may cause a dragging noise, more clearance may cause the clutch not to engage

Click the image to open in full size.

Here are the instructions included with the puller tool.

Click the image to open in full size.

I was able to get both these tools as rentals from Autozone. I tried to get them from AdvanceAuto first, but they did not have them available. I am getting my replacement parts form rockauto.
__________________

99 Z28. LS6 w/asa cam, Lid, Edelbrock SS LT's, Custom ORY w/ Flowmaster merge, Magnaflow, Ported TB & LS6 intake. Custom Tilton master. 18/19" c6 z06 machine face, CTS-V brakes, Harwood cowl hood. The carpet and dash have 180K
danbo313 is offline   Reply With Quote
Old 11-15-2009, 10:54 PM   #26
TECH Fanatic
Garage is empty, add now
 
eseibel67's Avatar
 
Trader Rating: 9
Join Date: Feb 2008
Location: Kitchener, ON
Posts: 1,671
Send a message via MSN to eseibel67
Default

Nice writeup, danbo.

OP: Your problem might only be rust between the clutch hub and plate. The car was sitting, and those 2 parts are just plain bare metal that rust easily. And now you are getting a hissing noise only when the compressor is disengaged.

I would try my luck at pulling the plate, cleaning the surfaces and resetting the air gap.
__________________
01 WS6
eseibel67 is offline   Reply With Quote
Old 11-21-2009, 01:23 PM   #27
On The Tree
Garage is empty, add now
 
Trader Rating: 8
Join Date: Jan 2005
Posts: 160
Default

Now that i think of it, A noisy clutch bearing will make noise all the time. The only thing that will make noise when the AC is off, and not when it is On is the clutch. If you look at wear the bearing is installed, it is on the housing of the compressor.

I believe the common thought is that the bearing is on the shaft which would turn the same speed as the pulley when the clutch was engaged, causing the bearing not to spin. However the bearing is always spinning regardless of the clutch being engaged or not.
__________________

99 Z28. LS6 w/asa cam, Lid, Edelbrock SS LT's, Custom ORY w/ Flowmaster merge, Magnaflow, Ported TB & LS6 intake. Custom Tilton master. 18/19" c6 z06 machine face, CTS-V brakes, Harwood cowl hood. The carpet and dash have 180K
danbo313 is offline   Reply With Quote
Old 11-21-2009, 01:23 PM
LS1Tech
Pontiac Firebird




Paid Advertisement
Reply

Tags
ac, bearing, clicks, clutch, clutches, engaged, fix, gm, hissing, lubrication, making, noise, noisey, noisy, sound


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 On
Refbacks are Off



All times are GMT -5. The time now is 04:52 AM.


Powered by vBulletin® Version 3.7.4
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.
Search Engine Optimization by vBSEO 3.5.2
Advertising - Terms of Service - Privacy Statement - JOBS
Emails & Contact Details