need some ac ?'s answered - The 1947 - Present Chevrolet & GMC Truck Message Board Network

justtime520 · 09-28-2010, 06:13 PM

So iam looking at buying a 72 chevy c20. it is ac cab but the guy who is selling it says that has a leak and has not been converted to 134. so whats the process in replacing the hoses and converting it over. how much doe will i be looking at. I gonna test drive it tomorrow and i will get some pics up.

69sixpackbee · 09-28-2010, 06:25 PM

Fix the leak and stick with R12. Much easier and cheaper in the long run.

justtime520 · 09-28-2010, 06:32 PM

so the r12 is cheaper. so about about the leaks how to check for them.

MVHandy · 09-28-2010, 06:36 PM

I will be doing my AC in the spring and have to leak check it, hope it is tight.

When the US signed the Kyoto accords one of the issues was use of Chloro-Fluorocarbon refrigerants so R 12 was phased out in the early 90's and is no longer manufactured.

Anyway, I took my truck in for inspection and talked to the guy there about converting and he said don't bother. There is a substitute called Freeze 12 that is compatible with R12 and R134 and available on e-bay or by internet. I also saw another refrigerant manufactured for R-12 systems at the swap meet in Englishtown last week.

69sixpackbee · 09-28-2010, 06:41 PM

Freeze12 is s**t!
R12 is still available and any more for about the same cost as R134 which, BTW, is just as harmful as HFC's...it took the feds THIS long to figure it out

Back to the question at hand. Get a vacuum pump, manifold gauge set and HFC-CFC leak detector. All of these can be had at even Harbor Fruit tools. You need these three items before you can begin to diagnose any problems.

Bud

cparman · 09-28-2010, 08:40 PM

I have done all of the above. I do think that you can still buy R-12 . I have a few customer that have bought it on EBAY. 30 LB cylinders. A life time supply for one vehicle.

I have a 63 Caddy that had R-12 in it. Long story, but evacuated it and undercharged it 20 %. Cold as ice!

I charged a 67 Chevelle today with freeze-12. Cold as well.

Sometimes we will use Freeze12 to charge a system that is know to have a leak. Use a flourescent dye, and ask customer to come back when it looses its cool. Look for the dye trail and repair. recharge with R134, with good results.

IMO, R-12 STILL gets colder that all of the above!

What is the 2nd largest illegal substance imported from Mexico? - - - - - R-12

justtime520 · 09-29-2010, 03:31 PM

ok got some pics this guy is selling for $2200 1972 c20 350/350 ac

justtime520 · 09-29-2010, 09:56 PM

emailed a service shop out here and this was the reply.

Hi there, We do service R-12 systems if its just a top off or refill of a small system. The issue is with larger systems like your truck. It holds 200.00 worth the r-12. Its no longer cost effective or wise to use r-12. With some upgrades we can build a really good-cold system on the 68-72 Chev trucks. Look at our website for some examples of what we do. If you would like to come down to the shop I will spend some time going over your options. If you want to save labor and do some of it yourself thats fine as well. Just give me a call so I have time to spend with you. We are going to slow down soon and that the perfect time to do the classic vehicles.

69 1/2 Sixpack Bee · 09-29-2010, 10:56 PM

Quote:

Originally Posted by justtime520

emailed a service shop out here and this was the reply.

Hi there, We do service R-12 systems if its just a top off or refill of a small system. The issue is with larger systems like your truck. It holds 200.00 worth the r-12. Its no longer cost effective or wise to use r-12. With some upgrades we can build a really good-cold system on the 68-72 Chev trucks. Look at our website for some examples of what we do. If you would like to come down to the shop I will spend some time going over your options. If you want to save labor and do some of it yourself thats fine as well. Just give me a call so I have time to spend with you. We are going to slow down soon and that the perfect time to do the classic vehicles.

Get another quote!

If you are near Phoenix check out ackits.com

justtime520 · 09-29-2010, 10:58 PM

yeah i thought so. i still need the leak fixed so would it cost 200 to replace the r12

69 1/2 Sixpack Bee · 09-29-2010, 11:37 PM

Quote:

Originally Posted by justtime520

yeah i thought so. i still need the leak fixed so would it cost 200 to replace the r12

If they are charging you $60.00 bucks a pound!

justtime520 · 09-30-2010, 12:03 AM

yeah the dude said 40 bucks a pound

09-28-2010, 06:13 PM	#1
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	need some ac ?'s answered So iam looking at buying a 72 chevy c20. it is ac cab but the guy who is selling it says that has a leak and has not been converted to 134. so whats the process in replacing the hoses and converting it over. how much doe will i be looking at. I gonna test drive it tomorrow and i will get some pics up.

09-28-2010, 06:25 PM	#2
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	Re: need some ac ?'s answered Fix the leak and stick with R12. Much easier and cheaper in the long run.

09-28-2010, 06:32 PM	#3
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	Re: need some ac ?'s answered so the r12 is cheaper. so about about the leaks how to check for them.

09-28-2010, 06:36 PM	#4
MVHandy Registered User Join Date: Jun 2009 Location: East Brunswick, NJ Posts: 70	Re: need some ac ?'s answered I will be doing my AC in the spring and have to leak check it, hope it is tight. When the US signed the Kyoto accords one of the issues was use of Chloro-Fluorocarbon refrigerants so R 12 was phased out in the early 90's and is no longer manufactured. Anyway, I took my truck in for inspection and talked to the guy there about converting and he said don't bother. There is a substitute called Freeze 12 that is compatible with R12 and R134 and available on e-bay or by internet. I also saw another refrigerant manufactured for R-12 systems at the swap meet in Englishtown last week.

09-28-2010, 06:41 PM	#5
69sixpackbee Registered User Join Date: Jan 2001 Location: Sabinal, Texas Posts: 1,706	Re: need some ac ?'s answered Freeze12 is s*t! R12 is still available and any more for about the same cost as R134 which, BTW, is just as harmful as HFC's...it took the feds THIS long to figure it out Back to the question at hand. Get a vacuum pump, manifold gauge set and HFC-CFC leak detector. All of these can be had at even Harbor Fruit tools. You need these three items before you can begin to diagnose any problems. Bud Last edited by 69sixpackbee; 09-28-2010 at 06:41 PM.*

09-28-2010, 08:40 PM	#6
cparman sharp as a marble Join Date: Jan 2007 Location: atlantic beach,florida Posts: 1,082	Re: need some ac ?'s answered I have done all of the above. I do think that you can still buy R-12 . I have a few customer that have bought it on EBAY. 30 LB cylinders. A life time supply for one vehicle. I have a 63 Caddy that had R-12 in it. Long story, but evacuated it and undercharged it 20 %. Cold as ice! I charged a 67 Chevelle today with freeze-12. Cold as well. Sometimes we will use Freeze12 to charge a system that is know to have a leak. Use a flourescent dye, and ask customer to come back when it looses its cool. Look for the dye trail and repair. recharge with R134, with good results. IMO, R-12 STILL gets colder that all of the above! What is the 2nd largest illegal substance imported from Mexico? - - - - - R-12 Last edited by cparman; 09-28-2010 at 08:41 PM.

09-29-2010, 03:31 PM	#7
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	Re: need some ac ?'s answered ok got some pics this guy is selling for $2200 1972 c20 350/350 ac

09-29-2010, 09:56 PM	#8
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	Re: need some ac ?'s answered emailed a service shop out here and this was the reply. Hi there, We do service R-12 systems if its just a top off or refill of a small system. The issue is with larger systems like your truck. It holds 200.00 worth the r-12. Its no longer cost effective or wise to use r-12. With some upgrades we can build a really good-cold system on the 68-72 Chev trucks. Look at our website for some examples of what we do. If you would like to come down to the shop I will spend some time going over your options. If you want to save labor and do some of it yourself thats fine as well. Just give me a call so I have time to spend with you. We are going to slow down soon and that the perfect time to do the classic vehicles.

09-29-2010, 10:58 PM	#10
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	Re: need some ac ?'s answered yeah i thought so. i still need the leak fixed so would it cost 200 to replace the r12

09-30-2010, 12:03 AM	#12
justtime520 Registered User Join Date: Mar 2009 Location: Tucson AZ Posts: 187	Re: need some ac ?'s answered yeah the dude said 40 bucks a pound



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