Thread: How to find leaky A/C line?

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  1. #1 How to find leaky A/C line? 
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    My A/C won't blow cold air. I checked the low pressure side was near zero so I recharged it to about 30. The next day it was back at zero so it seems I have leak but how do I find it? What are the most likely source of leak?

    2005 GP, NA
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  2. #2 Re: How to find leaky A/C line? 
    Killa Bee Scottydoggs's Avatar
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    best way ive found to find them by eye is to look over all the lines and where they connect to each other. being it leaked out over night there will be a greasy/oily mess at the leak point.

    if you have extra r- what every. clean the pipe off good should you find a messy area, then re fill and see if its dirty the next day.

    the compressor can also leak so look at that close too.

    they do sell a dye kit for the a/c it will leave a red stain from the leak area. its a recharge kit with leak detector in it already.

    98 Buick Regal GS, F body brakes, Caddy STS wheels, tinted tails L36 bottom end, lightly ported heads, 1.95 roller rockers, headers, gen 5 N* 3.0 pulley, FSIC, 42 lb injectors, a BrandonHall rebuilt trans, DHP tuned and AEM water/Meth injection https://goo.gl/gpV5kW
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  3. #3 Re: How to find leaky A/C line? 
    GT Level Member lewis1952's Avatar
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    the usual source for an a/c leak is the compressor shaft seal, it's right behind the pulley.
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  4. #4 Re: How to find leaky A/C line? 
    GrandPrix Junkie
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    Check both the schrader valves for leaks. Remove the plastic caps and see if one of them leaks. I just replaced the high side schrader on my 00 GT today and held 30 Hg just fine after that. Now it's nice and cold after the recharge.
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