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Charging the Air Conditioner

 
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Old 08 Feb 2010, 09:51 pm
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Default Charging the Air Conditioner

I had to take my A/C hoses off to rebuild the engine.
What steps do I need to take to recharge it after reassembly? I was told that I need to replace the evaporator. Is this true?
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Old 09 Feb 2010, 06:31 pm
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Default Re: Charging the Air Conditioner

In a perfect world you would replace the accumulator, evacuate the system, meaning pull a vacuum on it for 30 minutes or so and then add freon. I don't always do things this way with my car and haven't had any issues over 20 years or so ... My 2
John but I did build this
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Old 09 Feb 2010, 09:58 pm
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Default Re: Charging the Air Conditioner

Quote:
Originally Posted by driveability View Post
In a perfect world you would replace the accumulator, evacuate the system, meaning pull a vacuum on it for 30 minutes or so and then add freon. I don't always do things this way with my car and haven't had any issues over 20 years or so ... My 2
John but I did build this
Are you saying I might get away with just replaceing the "o" rings that I took apart, reconnect everything and charge it?

PS- The Porsche is awesome!!

Last edited by chuck2112; 09 Feb 2010 at 10:01 pm. Reason: Added a note
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Old 10 Feb 2010, 10:29 am
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Default Re: Charging the Air Conditioner

well,
You can but you risk having water in the system which can rust things. How often does this happen in modern systems I don't think much. If you have the extra cash to spend do it . I on the other hand the system is made much of aluminum mixed with oil not much of a rust friendly environment.
I am sure the manual will state otherwise, again its your call ...
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Old 14 Feb 2010, 01:12 pm
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Default Re: Charging the Air Conditioner

Quote:
Originally Posted by chuck2112 View Post
I had to take my A/C hoses off to rebuild the engine.
What steps do I need to take to recharge it after reassembly? I was told that I need to replace the evaporator. Is this true?
You don't need to replace the evaporator. It's a good idea to replace the accumulator, sometimes known as the receiver-drier. Where are you? Some list members have A/C vacuums and can help.
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Old 16 Feb 2010, 09:54 pm
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Default Re: Charging the Air Conditioner

Quote:
You don't need to replace the evaporator. It's a good idea to replace the accumulator, sometimes known as the receiver-drier. Where are you? Some list members have A/C vacuums and can help.
I am still in the process of putting this together but I am in Red Oak, TX.
Thanks alot!!
Chuck
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Old 17 Feb 2010, 09:49 pm
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Default Re: Charging the Air Conditioner

I'm not sure about Texas, but in California, Autozone will rent the pump for free. (They just take a deposit)
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Old 19 Feb 2010, 09:19 pm
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Default Re: Charging the Air Conditioner

Well, Autozone don't loan them out in Texas but I will check everywhere around until I find someone who does. I have used quite a few loaner tools but I had no idea that you could get a loaner A/C vacuum. Thanks for the info!
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Old 19 Feb 2010, 09:59 pm
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Default Re: Charging the Air Conditioner

I know this may sound odd but if you find an old refrigerator around the pump inside the unit makes a great evacuator. Takes a little work to remove, wire and fit the hose fitting but it's cheep..
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Old 20 Feb 2010, 11:05 am
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Default Re: Charging the Air Conditioner

Quote:
Originally Posted by driveability View Post
I know this may sound odd but if you find an old refrigerator around the pump inside the unit makes a great evacuator. Takes a little work to remove, wire and fit the hose fitting but it's cheep..
D'Oh. That should work, maybe a little slow, but certainly cheap. A key to it working is that the compressor can't be seized up, though.
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