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  #31  
Old 08-05-2011, 10:25 PM
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Re: Charging A/C System

On one of my previous SVXS, the A/C didn't work when I bought the car. I discovered one of the o-rings where one of the hoses connects to the compressor on the top was cracked and leaking. I replaced the o-ring, and charged it was 134a (it was a 92 svx), and it worked great and was ice cold for several years. It was still working when I sold the car.

Half-assed, yes. But, it worked perfectly.

Knock on wood, my current SVX is still working great on its original R12 charge.
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  #32  
Old 08-05-2011, 11:30 PM
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Re: Charging A/C System

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Originally Posted by SVXMAN2001 View Post
... my questions concerns are:

1) The manual states to initially charge through the high side (with engine OFF) while in liquid form? I am not all too familiar with this but my can of freon seems to be in liquid form?

Freon is in liquid form when under pressure. As the pressure is decreased, freon boils and makes a vapor just like water does when you boil water... you get steam, or a vapor. However, Freon boils at a much lower temperature than water does. Depending on the chemical composition, it varies somewhere below zero, but all refrigerants boil quite a bit below zero. The cold vapor from the boiling is what makes the refrigeration system cool.

When the system is properly evacuated with a vacuum pump, the proper way would be to pull down the system into a vacuum condition, seal off the vacuum in the system with the valves connect the hose from the can of refrigerant to the hi pressure side, open the valves, on the can and on the compressor with the can inverted, and let the liquid refrigerant flow in.

As the system begins taking in the liquid freon, at some point the pressure in the system and the pressure in the can of freon will become the same, so there will be a portion of freon liquid that will remain in the can.

...the only reason I bring this up is because once a can is used up on the high side, the manual states to finish charging on the low side with remaining freon in vapor form???

There is your answer. The suction side will be enough difference in pressure to allow remaining in the can of freon to get the majority of it into the system through the lo side, as the compressor is operating.

From what I've read a lot of systems charge only on the low side, why is this different on the svx?

Charging on the hi side would be a safer way to charge the system without risking damage to the compressor.

Thanks in advance for any help/suggestions, thanks Chris
When charging on the hi side the freon can must be inverted to get the liquid out.

Hope this helps.

Keith
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  #33  
Old 08-05-2011, 11:53 PM
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Re: Charging A/C System

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Originally Posted by Green1995SVX View Post
I've actually got a little stockpile of R12 in case mine ever needs to be recharged. Still on the original charge, and working great!
I know a few collectors of vintage muscle cars from the 60's and 70s that have the original R12 air conditioning systems.

Almost all of them are now using the R12 substitute which they say works wonderfully (and keeps their classics authentic and correct for the period when entering concours)

FREEZE12

.
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  #34  
Old 08-06-2011, 06:44 AM
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Re: Charging A/C System

Quote:
Originally Posted by svxcess View Post
I know a few collectors of vintage muscle cars from the 60's and 70s that have the original R12 air conditioning systems.

Almost all of them are now using the R12 substitute which they say works wonderfully (and keeps their classics authentic and correct for the period when entering concours)

FREEZE12

.
Description reads the same as R12a mentioned earlier. Wonder if it's the same stuff?
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  #35  
Old 08-06-2011, 12:49 PM
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Re: Charging A/C System

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Originally Posted by SVX_MY_BABY View Post
Description reads the same as R12a mentioned earlier. Wonder if it's the same stuff?
The feds, (Gestapo), would never allow this to happen. Trust me, it isn't.

Keith
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  #36  
Old 08-06-2011, 02:23 PM
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Re: Charging A/C System

whatever it is wow is it expensive.
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  #37  
Old 08-06-2011, 04:23 PM
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Re: Charging A/C System

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Originally Posted by 92 SVX View Post
whatever it is wow is it expensive.
Before the Gestapo got involved with that environmental hoax, you could buy a 30 lb pf r-12 anywhere for $20. Now it is $3000.00 and you can't buy it

Like Reagan said... The government is the problem.

Keith
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  #38  
Old 08-06-2011, 06:44 PM
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Re: Charging A/C System

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Originally Posted by kwren View Post
Before the Gestapo got involved with that environmental hoax, you could buy a 30 lb pf r-12 anywhere for $20. Now it is $3000.00 and you can't buy it

Like Reagan said... The government is the problem.

Keith
I know it.

A older guy I knew as a kid who worked in A/C business told me the entire switch to 134a was a hoax, bs, or what ever you want to call it.
He said look at the money, the patent on the freon was expired and thus the big companies needed something else they could patent and so they created the scare tactic on the old stuff to keep it from use.
Did I believe him, mostly yes I did.
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  #39  
Old 08-06-2011, 07:45 PM
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Re: Charging A/C System

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Originally Posted by kwren View Post
Like Reagan said... The government is the problem.
Amen brother.
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  #40  
Old 08-06-2011, 08:13 PM
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Re: Charging A/C System

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Originally Posted by kwren View Post
The feds, (Gestapo), would never allow this to happen. Trust me, it isn't.

Keith
I mean R12a not R12. And the R12a is quite cheap.
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  #41  
Old 08-06-2011, 08:39 PM
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Re: Charging A/C System

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Originally Posted by SVX_MY_BABY View Post
I mean R12a not R12. And the R12a is quite cheap.
Sorry, missed the "a"

Don't know about that one...

Keith
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  #42  
Old 08-06-2011, 08:45 PM
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Re: Charging A/C System

Where can you get R12a? Do you need A/C creds to buy?
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  #43  
Old 08-07-2011, 07:56 AM
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Re: Charging A/C System

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Originally Posted by 92 SVX View Post
Where can you get R12a? Do you need A/C creds to buy?
http://www.duracool.com/
http://www.redtek.com/home.html
As far as credentials, I guess that depends on local regulations.
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