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'91 Mustang Coming Out of Storage

fastsvo on Wed September 09, 2009 1:50 PM User is offline

Year: 1991
Make: Ford
Model: Mustang
Engine Size: 302
Country of Origin: United States

Hi Guys,

I have a 1991 Mustang GT with only 58k miles and is no longer blowing cold. Before the car went into storage, everything worked great.

I also have 3 cans of R12 left....I am sure you know where I am going with this one.

But before I simply recharge the system, I am concerned about leaks and loosing my valuable R12.

I have been trying to learn more about replacing the O-rings (with the Green ones and Nylog), but now it seems if I open the system, I will be forced to replace the dryer as well. I am assuming I have a leak somewhere since the car no longer blows cold.

Of course, converting to 134a is still an option.

What would you guys recommend here? I am new to servicing A/C....are there any documents that pertain specifically to this car that I can grab off the internet?

Thanks,

Eric

robs on Wed September 09, 2009 1:58 PM User is offlineView users profile

That's a big problem with not running an a/c system for a long period of time, it will create leaks after a while. I suggest repairing the leak, or even better, replacing all the o-rings in the system, keeping it R12 and replacing the drier/expansion device while you have the system open.. Those two items are fairly inexpensive.

Cussboy on Wed September 09, 2009 2:52 PM User is offline

Quote
Originally posted by: fastsvo

I have a 1991 Mustang GT with only 58k miles and is no longer blowing cold.


Is the compressor actually engaging? If so, then maybe it's only a little low on refrigerant. However, I tend to agree with every word of Robs response, like keeping it R-12.

fastsvo on Wed September 09, 2009 2:57 PM User is offline

From what I can tell, when driving in the car, the compressor is engaging and disengaging, but I will have to test it in the driveway and try jumping the switch.

I do have two older mustangs (86 and 67) that I can save the R12 for as well....I am assuming those compressors are even worse at handling the 134a conversion.

-Eric

mk378 on Wed September 09, 2009 3:55 PM User is offline

Don't jump the switch without checking the pressure first, don't want to run with zero pressure. If there is some R-12 left, but not enough, go over it with a leak detector and try to find the leak.

fastsvo on Thu September 10, 2009 5:06 PM User is offline

Where can I get the proper gauges in order to help me out here? Harbor Freight?

HVargas on Thu September 10, 2009 6:01 PM User is offlineView users profile

Right here of course
Mastercool DIY Gauge Set

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When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: Arizona Mobile Air


Edited: Thu September 10, 2009 at 6:07 PM by HVargas

fastsvo on Thu September 10, 2009 6:30 PM User is offline

Awesome.

Do these connectors matter for R12 and 134a cans?

TRB on Thu September 10, 2009 6:38 PM User is offlineView users profile

You will need a can tap aslo.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: ACKits.com

HVargas on Thu September 10, 2009 6:39 PM User is offlineView users profile

They do but our gauge sets work with both R12 and 134a.

-------------------------

When considering your next auto A/C purchase, please consider the site that supports you: ACkits.com
Contact: Arizona Mobile Air

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