| can I just put Duracool into an R12 system thats still sealed? [message #88983] |
Thu, 17 June 2010 11:05  |
Rusty
Messages: 197
Registered: October 2005
Location: Philadelphia Pa
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My wifes 93 Corolla has always had great a/c until last summer, then this summer its completely gone. Its always been an original system and it has the R12 nipple. I suspect after 17 yrs although the system is still 'sealed', and its a low miles vehicle only 115k, that the original charge eventually just leaked out.
My question is - can I just try loading HC12 in? Without a flush? I can evacuate it and even flush it I have to, but I think the system is still intact and sealed and would respond to a can or 2 or duracool, as long as it will not react negatively to such an R12 environment with no flush
?
Rusty
75 Glenbrook
Philadelphia Pa
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| Re: [GMCnet] can I just put Duracool into an R12 system thats still sealed? [message #88999 is a reply to message #88995] |
Thu, 17 June 2010 13:19  |
Chr$
Messages: 2690
Registered: January 2004
Location: Scottsdale, AZ
Karma: 1
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That is one reason why US made cars engage the AC compressor in Defrost and other modes.
Of course, the AC helps remove condensation in the car in winter too.
| k2gkk wrote on Thu, 17 June 2010 10:30 |
Years ago, folks stated that you needed to run your A/C
occasionally (once a week?) even in winter so that the
lubricating "oil" would keep your compressor seals tight.
If you didn't, it was likely that you'd have to add more
refrigerant to make it work correctly.
* Mac Macdonald *
* Oklahoma City *
** "Money Pit" **
* '76 ex - P.B. *
Date: Thu, 17 Jun 2010 10:25:12 -0700
From: bowks43@rogers.com
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] can I just put Duracool into an R12 system thats still sealed?
My 93 Yukon did exactly the same thing a year ago. I happen to have a cyl. of R-12 with about 27 lbs. left in it. I topped it up to 25- 30 p.s.i on the low side & this spring it's still fine.
Norm, Bowmanville, On.
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I suspect after 17 yrs although the system is still 'sealed', and its a low miles vehicle only 115k, that the original charge eventually just leaked out.
--
Rusty
75 Glenbrook
Philadelphia Pa
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-Chr$: Perpetual SmartAss
Scottsdale, AZ
77 Ex-Kingsley 455 SOLD!
2010 Nomad 24 Ft TT 390W PV W/MPPT, EV4010 and custom cargo door.
Photosite: Chrisc GMC:"It has Begun" TT: "The Other Woman"
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| Re: can I just put Duracool into an R12 system thats still sealed? [message #89014 is a reply to message #88983] |
Thu, 17 June 2010 14:55 |
Rusty
Messages: 197
Registered: October 2005
Location: Philadelphia Pa
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R12 when available, is upwards of $120 a pound now, if you can find it. My mechanic saved it for years, doing retrofits, he finally used up his last stuff. So the longer you hold on to it, the more it will be worth, but you can definitly unload it for a couple grand I bet just by tossing it into the back of your car and paying visits to a/c places, they will take that stuff off your hands for sure.
Rusty
75 Glenbrook
Philadelphia Pa
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| Re: can I just put Duracool into an R12 system thats still sealed? [message #89052 is a reply to message #88983] |
Thu, 17 June 2010 20:10 |
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mike miller
Messages: 3576
Registered: February 2004
Location: Hillsboro, Oregon
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| Rusty wrote on Thu, 17 June 2010 09:05 |
... My question is - can I just try loading HC12 in? Without a flush? ...?
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Seems the discussion drifted and did not answer your question.
From what I understand, as long as the system still has something in it (has SOME pressure) you can put HC12 (or equivalent) with the left over refrigerant. you will have to experiment to get the correct pressure as you will not know exactly what your mix is.
Also, with any unknown mix, do not expect any "professional" to touch this AC in the future. (For many reasons.) But they, in the US, will not touch any system with a KNOWN Hydrocarbon based refrigerant. So this might not be an issue.
If your system has leaked all the way down, it will have moisture inside. It should get more than a "topping off."
Mike Miller -- Hillsboro, OR -- on the Black list
(#2)`78 23' Birchaven Rear Bath -- (#3)`77 23' Birchaven Side Bath
More Sidekicks than GMC's and a late model Malibu called 'Boo'
http://m000035.blogspot.com
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| Re: can I just put Duracool into an R12 system thats still sealed? [message #89063 is a reply to message #88983] |
Thu, 17 June 2010 21:42 |
Rusty
Messages: 197
Registered: October 2005
Location: Philadelphia Pa
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Theres still some pressure. I'll try a can of HC12, I ordered 3 today. I should probably put some oil in too. Mineral oil I guess? Just a little shot? I wonder what Toyota used. Its still sealed from when it was new. The car was taken care of and driven soft.
Far as any shop not touching it, I have no problem with that. I will probably end up retrofitting it myself in the fall. I just want to get her thru the summer.
Thanks all
Rusty
75 Glenbrook
Philadelphia Pa
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| Re: can I just put Duracool into an R12 system thats still sealed? [message #89066 is a reply to message #89063] |
Thu, 17 June 2010 22:23 |
roy1
Messages: 2126
Registered: July 2004
Location: Minden nevada
Karma: 6
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It would be best if you can leak check it before you try to charge it ,my 1990 4 runner had a leak from the discharge line rubbing on the brake line. If you feel confident that it is not leaking just add the duracool to the existing charge of 12. You will probably end up with around 25 lb suction when it is full. When the suction line gets cold and wet you should be about charged the Toyota most likely has an expansion valve in it.
I charged a Chevy Tahoe today after replacing the compressor and it was full at a little more then 20 lbs.of 134. My Toyota was full at a little more then 25 lbs. of Duracool an a Scotch of 134.
Roy
Roy Keen
Minden,NV
76 X Glenbrook
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