A/C Compressor horrible Squeal - Team Camaro Tech
Heating & Cooling Heating, cooling and air conditioning

 1Likes
  • 1 Post By parkbrau
 
LinkBack Thread Tools Display Modes
post #1 of 8 (permalink) Old Sep 18th, 18, 09:06 AM Thread Starter
Senior Tech
Dave
 
Join Date: May 2001
Location: Frisco, TX
Posts: 385
A/C Compressor horrible Squeal

I rebuilt the factory A/C in my 68 a few years ago, and it recently started having a problem. It started only occasionally but is now constant. The A/C would be running for some time, then the A/C compressor would stop turning and make a loud squealing sound as the belt is slipping. Now it is very constant. I start the A/C, the compressor engages and runs normally for a couple minutes and the vents blow cold air then the compressor locks up. It has been suggested that the expansion valve is stuck open and liquid refrigerant is getting to the compressor, which obviously will not compress and causing the compressor to stop turning. Any way to prove this theory? The valve is cheap so I guess I could try it, but losing $100 of R12 on a blind test concerns me. The compressor, expansion valve, dryer, condeser and hoses were all replaced when I rebuilt it. The evaporator is original but I pressure tested it. It also has the original POA valve.

Dave

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

68RS/SS Convertible L48 (350/295 Powerglide)
daverichard is offline  
Sponsored Links
Advertisement
 
post #2 of 8 (permalink) Old Sep 20th, 18, 06:33 AM Thread Starter
Senior Tech
Dave
 
Join Date: May 2001
Location: Frisco, TX
Posts: 385
Re: A/C Compressor horrible Squeal

No A/C gurus out there? I am sure someone has an opinion!

Dave

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

68RS/SS Convertible L48 (350/295 Powerglide)
daverichard is offline  
post #3 of 8 (permalink) Old Sep 26th, 18, 12:42 PM Thread Starter
Senior Tech
Dave
 
Join Date: May 2001
Location: Frisco, TX
Posts: 385
Re: A/C Compressor horrible Squeal

bump...

Dave

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

68RS/SS Convertible L48 (350/295 Powerglide)
daverichard is offline  
 
post #4 of 8 (permalink) Old Sep 26th, 18, 01:15 PM
Moderator
John
 
Vega$69's Avatar
 
Join Date: Sep 2010
Location: Vegas NV/Wesley Chapel FL
Posts: 13,293
Garage
Re: A/C Compressor horrible Squeal

When the system is serviced the R12 should be recovered for reuse?
Vega$69 is offline  
post #5 of 8 (permalink) Old Sep 26th, 18, 01:59 PM
Gold Lifetime Member
Tom
 
Join Date: Mar 2008
Location: the 02176
Posts: 5,987
Re: A/C Compressor horrible Squeal

Remove the belt and check the movement of the bearing itself on the clutch. Mine went on the daily driver this summer and you would have thought the engine was coming apart by the sound of it, awful squealing and grinding noises. If it is just the bearing, it's easily replaced.

'67 rs - ordered new by my Grandfather
327 L30, K-K, Deluxe int, tach & gauges, 12 bolt posi, 4 speed.

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
-
To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.
Melrose RS is offline  
post #6 of 8 (permalink) Old Sep 27th, 18, 08:32 AM Thread Starter
Senior Tech
Dave
 
Join Date: May 2001
Location: Frisco, TX
Posts: 385
Re: A/C Compressor horrible Squeal

Clutch spins free. Also only squeals when the clutch is engaged and it takes a couple minutes after turning on the A/C for it to start making noise.

On the R12 issue, you can get a shop to recover the R12, but they cannot reinstall it. They are required to recycle it. I would rather not change to 134 if I don't have to as these old systems just don't cool as well when updated.

Dave

To view links or images in signatures your post count must be 10 or greater. You currently have 0 posts.

68RS/SS Convertible L48 (350/295 Powerglide)
daverichard is offline  
post #7 of 8 (permalink) Old Sep 27th, 18, 08:36 AM
Senior Tech
John
 
parkbrau's Avatar
 
Join Date: Sep 2004
Location: Stuttgart
Posts: 7,930
Re: A/C Compressor horrible Squeal

Quote:
Originally Posted by daverichard View Post
Clutch spins free. Also only squeals when the clutch is engaged and it takes a couple minutes after turning on the A/C for it to start making noise.

On the R12 issue, you can get a shop to recover the R12, but they cannot reinstall it. They are required to recycle it. I would rather not change to 134 if I don't have to as these old systems just don't cool as well when updated.
Try another clutch. The clutch will spin free until energized.
Petes L48 likes this.
parkbrau is offline  
post #8 of 8 (permalink) Old Sep 27th, 18, 08:46 AM
Senior Tech
Ed
 
Join Date: Feb 2018
Location: Pittsburgh, PA
Posts: 399
Re: A/C Compressor horrible Squeal

Sounds like maybe a bad clutch or bearing once it gets hot.
ZEN357 is offline  
Sponsored Links
Advertisement
 
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Team Camaro Tech forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address.
NOTE we receive a lot of registrations with bad email addresses. IF you do not receive your confirmation email you will not be able to post. contact support and we will try and help.
Be sure you enter a valid email address and check your spam folder as well.



Email Address:
OR

Log-in










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



Posting Rules  
You may post new threads
You may 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

 
For the best viewing experience please update your browser to Google Chrome