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Fixing AC to work on new juice

Posted By: MrSixpack

Fixing AC to work on new juice - 11/02/13 07:00 PM

My 66 Chrysler 300 has a none working AC system.
And my goal is to fix it during this winter.
Is it possible to make it work with the new type of freon?
Where can I get a rebuild kit for the system.

Thanks
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/03/13 02:54 PM

You might see if you can retrieve some past threads regarding this. From what I've gathered R12 is no longer being manufactured tho there are tons left. As you know it (the single cans) is available on eBay/CL tho it is pricey. To changeover I think you need the new type "barrier" hoses, the reciever/drier needs to be changed to the new type, the valve at the firewall needs to be changed, the oil in the compressor needs to be changed to the new type, new type of O rings in the hoses/fittings then vac pump the system empty which is std procedure then add the new stuff & I think you go by weight & use less of the new type of freon. Some say it dont cool as well as R12 & others are happy with it. dont remember if a larger evaporator (next to rad) is needed (or recommended). I'd wanna check the system for leaks in the process so I dont have to mess with it again. Might be more to it than this but here's a BTT for ya. EDIT A '66 "300" would have a monstrous condensor so you're good there
Posted By: fourgearsavoy

Re: Fixing AC to work on new juice - 11/03/13 03:44 PM

I have converted quite a few cars to 134 and all I have done is changed the fittings and evacuate then charge with 134.
All the hype about changing O-rings and special hoses and receiver/drier replacement is not necessary.
Some of the newer kits come with improved oil in the can so it is added during the recharge.
Just my after 30 years in the dealership
Gus

Attached picture 7910262-frontveiwsavoy.jpg
Posted By: Barnstorm

Re: Fixing AC to work on new juice - 11/03/13 05:53 PM

Quote:

I have converted quite a few cars to 134 and all I have done is changed the fittings and evacuate then charge with 134.
All the hype about changing O-rings and special hoses and receiver/drier replacement is not necessary.
Some of the newer kits come with improved oil in the can so it is added during the recharge.
Just my after 30 years in the dealership
Gus

x2
Posted By: MrSixpack

Re: Fixing AC to work on new juice - 11/03/13 08:24 PM

A BIG thank you
Posted By: Supercuda

Re: Fixing AC to work on new juice - 11/04/13 12:12 AM

I converted my 87 Diplomat over, with the C171 compressor. I was not real impressed with it's ability to handle the Texas heat.
Posted By: shanker

Re: Fixing AC to work on new juice - 11/05/13 12:10 AM

Quote:

You might see if you can retrieve some past threads regarding this. From what I've gathered R12 is no longer being manufactured tho there are tons left.




you're right about tons of it....but it's still being made by Dupont down in Ingleside, Texas. I see rail cars full of R12 every day I drive over there leaving the plant.

R12 is still used, just not in Automotive Cooling systems.
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/05/13 01:50 AM

Quote:

R12 is still used, just not in Automotive Cooling systems.

Alright, OK if R12 cools the best & it is still available & will be for quite awhile would it not be a smart move to keep a system on R12 rather than converting?
Posted By: astrobuf

Re: Fixing AC to work on new juice - 11/05/13 04:29 AM

Well, a charge of R12 for your car will run >$ 500 if it leaks, you get to do it again. I too have changed many system's over. Fix the leaks, new orings, Fittings,new receiver/dryer and evac and fill. Need to replace the receiver to avoid contaminants that will coorode your compressor.

Astrobuf
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/05/13 02:52 PM

Quote:

Well, a charge of R12 for your car will run >$ 500

that answers that Q
Posted By: shanker

Re: Fixing AC to work on new juice - 11/05/13 07:59 PM

Quote:

Quote:

Well, a charge of R12 for your car will run >$ 500

that answers that Q



I guess someone hasn't checked prices of R12 on ebay...it's gone down ALOT in pricing in the past several years.
Posted By: John_Kunkel

Re: Fixing AC to work on new juice - 11/05/13 08:57 PM

Quote:

Alright, OK if R12 cools the best & it is still available & will be for quite awhile would it not be a smart move to keep a system on R12 rather than converting?



Yes, yes, yes. R-12 isn't that expensive and no conversion is necessary. If it leaks with R-12 it'll leak faster with R-134.
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/05/13 09:53 PM

John you are the man & alright I will stay with R12 when I get to that point (adding AC to my 65 dart)
Posted By: BDW

Re: Fixing AC to work on new juice - 11/05/13 10:06 PM

Why, although it might not be as expensive as you thought it will still be at least 5x more.
You want to bid on freon on eBay for $25 a can or go to local store for $5?
Posted By: John_Kunkel

Re: Fixing AC to work on new juice - 11/06/13 12:43 AM


The R-134 molecule is considerably smaller than the R-12 molecule which simply means it will leak out faster and most R-12 systems are defunct because the refrigerant leaked out. In the long run the cheaper R-134 might wind up costing as much as the R-12 for the same length of service.
Posted By: astrobuf

Re: Fixing AC to work on new juice - 11/06/13 06:45 AM

Quote:

John you are the man & alright I will stay with R12 when I get to that point (adding AC to my 65 dart)



It is illegal for you to purchase and install R12.

It is a federal offense for an unlicensed individual to do so.

I see folks are selling on ebay and using an illegal dodge to do so for now. Doubtful this will be an option in a few years when you need to reload.

If you dont know what you are doing, it is doubtful you will be able to correctly load the 12oz cans of r12 you buy illegally. You will end up paying someone to do the job right sooner or later.
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/06/13 06:49 AM

Yeah I definitely dont know my way around AC systems. I'd (likely) have my maintenence man buddy do it with his R12 gauge set
Posted By: John_Kunkel

Re: Fixing AC to work on new juice - 11/06/13 08:07 PM

Quote:



It is illegal for you to purchase and install R12.






No it isn't, I have a 509 license and they're easy to get online. BTW, it's also illegal to go 66 mph in a 65 zone....how many here are guilty?



Quote:

If you dont know what you are doing, it is doubtful you will be able to correctly load the 12oz cans of r12 you buy illegally. You will end up paying someone to do the job right sooner or later.




"Shunt's Law" applies here (If you don't know what you're doing you shunt mess with it), same applies to all automotive operations.

"Loading" cans of R-12 is no different than "loading" cans of R-134 and take notice of the DIY charging kits available in every box store.
Posted By: MrSixpack

Re: Fixing AC to work on new juice - 11/06/13 08:57 PM

We pressure tested the system to day and it's leaking from the input shaft on the compressor.
So I need to rebuild the compressor, but who has parts for it?

Thanks
Posted By: RapidRobert

Re: Fixing AC to work on new juice - 11/07/13 06:16 AM

Quote:

So I need to rebuild the compressor, but who has parts for it?

X2, If I have any leaks (at $25 a can) I want the system confirmed sealed up tight before I proceed
Posted By: John_Kunkel

Re: Fixing AC to work on new juice - 11/07/13 07:31 PM

Quote:

We pressure tested the system to day and it's leaking from the input shaft on the compressor.
So I need to rebuild the compressor, but who has parts for it?



No need to rebuild the compressor, just install a new seal. Seal kits are readily available.

Attached picture 7915546-Compseal.jpg
Posted By: stockerbill

Re: Fixing AC to work on new juice - 11/08/13 05:34 AM

John is 100% correct on everything he told you ! If you have a r12 system,leave it a r12 system Much cooler and longer lasting than any converted system and these days not any more money if you do it correct. I have been doing ac from 1968 to present and in my opinion, if you have a fact unit.. use it as intended
Posted By: BDW

Re: Fixing AC to work on new juice - 11/08/13 11:54 AM

I don't buy into it's not as cold hype, my system is colder.
And there's really no way to argue it costs the same. Simple math

Posted By: 70Duster

Re: Fixing AC to work on new juice - 11/08/13 12:11 PM

Quote:





No it isn't, I have a 509 license and they're easy to get online. BTW, it's also illegal to go 66 mph in a 65 zone....how many here are guilty?






OP means an EPA section 609 license and yes, very easy to get online.
Posted By: John_Kunkel

Re: Fixing AC to work on new juice - 11/09/13 12:02 AM

Quote:

I don't buy into it's not as cold hype, my system is colder.




How long does it take to reach that temperature after soaking in the sun all day with the windows closed and an interior temp of 130?
Posted By: 383man

Re: Fixing AC to work on new juice - 11/09/13 12:47 AM

Here in Md I had to take a course in 1992 to get my certfied license for R12. Course anyone can buy the 134. I have been around and working on AC systems since about 1974. To me the 134 gets almost as cold as the R12 but I agree it takes longer to get that cold. I have done many conversions like Gus has done converting an R12 system to 134 because most people dont want to pay what the R12 is and they dont want to shop Ebay for it. I did not know you could get the R12 much cheaper on Ebay as thats nice. And to think of how many cans of R12 I used to have around my garage since most of the time under warranty we could get an extra can of R12 when we worked on it and I must have had 2 cases of R12 at one time but not anymore. Ron
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