94 Z28 AC leaking

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  #1  
Old 09-20-2010, 09:21 AM
pcarollo's Avatar
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Default 94 Z28 AC leaking

Ok so I put 2 cans of AC juice in the system, and they both leaked out. I don't know where it is leaking, though I did do a quick check on the lines and found where it may be leaking out, I just don't know what to expect. Can someone give me a 'worst case' scenario for getting this repaired? Any advice on what not to do would be helpful...as well as anything else. Good thing the temps in AR have cooled a bit and I can remove the T Tops!!
thanks!
 
  #2  
Old 09-20-2010, 09:42 AM
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look for oil. the ac has oil in it as well and thats what you will see if its leaking. i would take it to an ac shop. they have the specialized tools for leak testing
 
  #3  
Old 09-20-2010, 11:41 AM
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Worst case, as far as I'm concerned, would be a leaking evaporator due to the labor involved in replacing it. Ugly, ugly job. A bad compressor would be an expensive part to replace but a leaking front seal isn't the usual failure. A leaking condenser is also a nasty labor job since the cooling system has to be drained and the radiator removed.
Craby is right, though, the AC system contains several ounces of oil and when the refrigerant leaks out, so does the oil. The oil is visible and attracts dirt so follow the pipes and hoses, looking for that. Hopefully you'll find a simple problem.
My 94 was losing refrigerant due to a failed high-side pressure sensor. The design changed a bunch of times and now there's an improved part.
 
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  #4  
Old 09-20-2010, 05:58 PM
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Take it to an AC shop and ask them to perform a vacuum leak check. If it passes that, have it recharged and ask them to add the dye to the system. Run the AC for a couple of days and take it back. They have a UV light that the dye lights up like an X-mas tree under. That will pinpoint the source of the leak, and quick. It will be cheaper than shotgun replacing parts until the leak is fixed.

But, if I had to guess, I would look at the compressor. The front seal is a very common failure point on cars over ten years old. Not hard to replace, but the compressor is a couple hundred bucks.
 
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