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mytsharpgn
07-05-2008, 06:42 PM
OK. So with the thermostat changeout almost complete (turbo inlet gasket disintegrated, new one on order), I am now looking at trying to get the A/C working again. Last time it worked was about 7 years ago. I got ahold of some R12 and charged it back up. By the next summer, it had all leaked out, and I haven't done anything with it since. I do have a set of R134 gauges, but wanting to know how to find my leak, fix it, and recharge the system. I am assuming I need to vacuum out what may be left of the R12. I do not have a vacuum pump or an air compressor to run it with, although a friend of mine has an air compressor. No idea how long it would take to vacuum out the system, or what, if anything, would need to be changed out or replaced as a part of the conversion.

Under the resources tab on the GN website, several of the places that I thought there might be information on this come back with a 404 error: page not found. Been that way for several weeks. So I'm coming to you guys.

Thanks.

Kirk.

PaCemkr86
07-05-2008, 09:19 PM
just install the r134a conversion fittings, and recharged it with 134a
that has dye in it..

Then after enjoying the a/c in your GN for a few days look for the leak with a black light..

mytsharpgn
07-05-2008, 11:32 PM
Phil,

Are you telling me that I don't need to do ANYTHING but add fittings that will allow my gauges to hook up, and recharge the system with the dye you mention?!?!?! That seems awful easy.

Will the dye act as the oil that I should be using to lubricate the system, or will I need a can of oil, too?

Do I recall reading that the ratio of R134 compared to R12 that is necessary to fill the system is about 80%?

Kirk.

Keller
07-06-2008, 12:19 AM
Not sure what tabs are showing the 404's. Please message me with the ones that are troubled. Could not find any.

http://www.gnttype.org/techarea/airconditioning/R12toR134a.html has all the info you should need. A compressor-to-vacuum converter would be handy. They are pretty cheap, and very handy. Not very expensive. Using one of those, I was able to suck my system down in about 30 minutes.

PaCemkr86
07-06-2008, 11:18 AM
The dye is already in the cans of freon... and there should be plenty of oil in the system still.. i wouldn't add any..

But yes.. just add the fittings, hook up the gauges and add freon.


" i did this on my 86 Mustang and my and 86 GN" works fine, no problems.. been cooling like that several years already

Keller
07-06-2008, 12:46 PM
The dye is already in the cans of freon
The ones marked as having the dye. And I think just one can with the dye is necessary per fill. Not every can of R134a (which is technically not called 'Freon' but 'Suva') has the dye.

R-12, R-22, R-23 are "Freon", R-134a and many of the other "new" refrigerants are "Suva".

http://refrigerants.dupont.com/Suva/en_US/pdf/h96506.pdf (leak detection type)
http://refrigerants.dupont.com/Suva/en_US/products/suva134a.html

mytsharpgn
07-06-2008, 04:08 PM
Ok. I give it a whirl. I saw some cans of dye at the parts store today.

Scott, the links that were broken all seem to be fixed now. The majority of them were on the main page under the "Resources" dropdown menu. I can't remember which ones weren't working. If I see them again, I'll let you know.

Thanks.

Kirk.

Keller
07-06-2008, 07:30 PM
Scott, the links that were broken all seem to be fixed now.
Nothing has been changed. Perhaps a connectivity anomaly.

mytsharpgn
07-06-2008, 08:45 PM
By the way, what is a compressor-to-vacum converter, how does it work and where can they be found?

PaCemkr86
07-06-2008, 09:05 PM
http://cgi.ebay.com/A-C-VACUUM-PUMP-R134A-R12-CONNECTORS-AIR-CONDITIONER_W0QQitemZ190234905991QQihZ009QQcategor yZ66999QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

http://search.cartserver.com/search/search.cgi?cartid=a-6834&category=databaseDescript&maxhits=5&keywords=ROB34970



http://www.tptoolbox.com/System/CG/ROB-34970.jpg