Re: A/C DIY? - Saab 9000 Bulletin Board - Saabnet.com
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Re: A/C DIY?
Posted by Abusot (more from Abusot) on Wed, 16 Apr 2008 06:01:01
In Reply to: A/C DIY?, tz, Mon, 14 Apr 2008 12:45:43
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If you take your old hose to any hydraulic supply shop, they can make you a new one for a fraction of the price of one from the dealer (or even Eeuro)
I have replaced hoses without vacumming. The idea is to leave the system open to the air for as little time as possible and if you are quick, it works. I'm not recommending this as its certainly not the best idea, and environmentally unsound, but I did it and the AC has been fine for over 2 years. All you need is a cheap combo hose/guage which is available at any ato parts.
Assuming r134 refig, bleed the refrig at the high side port with the car off and stone cold. This makes sure that the least amount of oil gets expelled. Once you hear no more hiss, carefully loosen the hose connections to relaese any trapped pressure. Take the hose off and quickly plug both the ends where the hose was connected to prevent any air getting into the system.
When you go to install the new hose, spray some freon into the hose and plug one end then quickly attach the end that is not plugged, then romove the plug and connect the second end.
Recharge the system up to about 25-30 psi on the guage, then bleed the refrig until it is empty and re-fill, repeat the bleed and fill one more time and you are done. While this is not as good as vacumming the system, you have evacuated almost all of the refrigerant in the system, so it should be ok.
posted by 74.229.5...
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