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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 07-10-2010   #1 (permalink)
snafu7x7 is offline Rookie

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Gainesvill   Florida
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Default AC recharging question

How much would you guys expect to pay to evacuate and recharge the AC? My 69 has been converted to r134, and when it was last charged it was done by a buddy of mine who only charged me for the coolant (which was about $30 if I recall correctly). The process seemed dead simple too, simply hook it up, evacuate it, then refill it. I recently had to get it charged up (I'm hoping I don't have a leak) and they charged me a small fortune for what seems like a very routine procedure. What would you expect to pay at a mechanics and is this something I can easily do myself by purchasing the coolant with a diy kit?

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Unread 07-10-2010   #2 (permalink)
texasvarmit54 is offline Rookie

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Default mustang a/c

my 66 mustang coupe 289 was 70.00 for verything.Then checked for leaks all is good. Good luck with yours
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Unread 07-10-2010   #3 (permalink)
Stevan26 is offline Made Member

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you dont need to evacuate it! thats only so the dealer knows how much freon they put in so they know how much to charge you! they put ur old freon back in with new stuff!

dealer wanted 100-160$ to do my 01 cobra. depending how much freon it needed. i went to car quest. bought a do it ur self kit for 30$ it came with one can of freon and the hose and gauge hook up. if you need 2 cans, it cos 50$

it is VERYY simple. idid mine and my buddys!

the hose and gauge and re-useable. so the next time u want to recharge urs or sumone elses you only have to buy the freon.which is 10-15$

now you can get these do it ur self kits at walmart or most any auto parts store. go to an auto parts store and ask for help and they will help you do it so u can it ur self next time! its VERY stupidly simple! a monkey could do it!
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Unread 07-11-2010   #4 (permalink)
andrewmp6 is offline Top Dog

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If they are charging it over and over there is a small leak somewhere.Your best bet is let them put the dye in it and charge it if it leaks they will find it with a vu light.The kits they sell are kinda crap the gauges are never right and you don't know really how much is there and how much to add.
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Unread 07-11-2010   #5 (permalink)
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It only needs to be evacuated, if it has been open to the atmosphere such as changing out a part, or if the leak was severe enough that it not only leaked out the freon but with pressure changes sucked air in. Generally with a leak (unless it is severe) some pressure remains in the system and air can't get in, in this case it only needs the freon, leaking systems also lose refrigerate oil which must be replaced, otherwise it is like running your car low on oil, eventually it will end in failure. If you are only adding 1 maybe 2 cns or lbs of freon a year, thats not too severe for such an old car, it may need to have the o-rings replaced unless someone did them when they converted to 134, they should have also added the oil compatible with 134 as that time. You can put in your own 134, you can buy it any auto parts store, even some W-marts carry it, you can also buy the adapter hose to add it, I would get at the auto parts store, they should have one with a metal end, the cheap ones have a plastic end and won't last. Freon needs to be added on the low side, this is the fitting on the compressor that leads from the firewall. If you are going to add the freon your self, let us know. We or I will provide additional instructions. It is not difficult. Post your results. Good Luck.
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