Thread: Common AC Leak Points or Failure Grand Prix

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  1. #1 Common AC Leak Points or Failure Grand Prix 
    GT Level Member mainecrab's Avatar
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    I have a 97 Grand Prix GT. I have an AC leak that I can hear is near the compressor area but cannot pinpoint where. Should I just replace the entire hose ac accumulator and compressor and that should fix it? well I mean as well as the orifice tube and vacuum check pressure and refill?

    Its weird ebcause when I put in the freon it will hold about a day but last night I could hear it coming out but it was cold so it seemed maybe a bad O ring or something? Would a bad compressor still get cold temps? it wasnt too loud either.
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  2. #2 Re: Common AC Leak Points or Failure Grand Prix 
    Killa Bee Scottydoggs's Avatar
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    you can use freon with leak detector die in it so where it turns red, you found your leak, then repair where the leak is and recharge it.

    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: Common AC Leak Points or Failure Grand Prix 
    GT Level Member mainecrab's Avatar
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    Yeah I used UV dye but I didnt see it anywhere that I could fit the UV lamp. I guess ill have to try it again.
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  4. #4 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    same thing happened to me...put die in let the a/c run for a while to circulate the die..never found a leak..but i always lose the freon...however once it gets down to like 15 psi it holds and doesnt go any lower..odd to me lol..im assuming its an o-ring that cant handle the high pressure but can handle the lower pressure.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  5. #5 Re: Common AC Leak Points or Failure Grand Prix 
    I AM PEWPIN! rynoman03's Avatar
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    I had a pin hole leak in my condensor coil when mine was leaking. Look there too!
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  6. #6 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    hmmm..im gonna take my UV light tomorrow night and check there too..thanks for the idea Rynoman
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  7. #7 Re: Common AC Leak Points or Failure Grand Prix 
    honda owner. jerZcavy4120's Avatar
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    so what does it mean when your car has a/c but absolutely zero heat?
    Jenny, The '99 Silvermist GTP. With the mod's that matter.
    I would rather lose by a mile because I built my own car, than lose by an inch, because someone else built it for me. Your car is your story, so don't let someone else write the book.
    http://www.grandprixforums.net/threads/76250-Jenny-(Picture-Heavy)/page2
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  8. #8 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    you have absolutely zero freon..or a bad compressor
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  9. #9 Re: Common AC Leak Points or Failure Grand Prix 
    honda owner. jerZcavy4120's Avatar
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    well on a lazy summer day i'll poke at it a lil bit and see what it is but at least i have a good idea now
    Jenny, The '99 Silvermist GTP. With the mod's that matter.
    I would rather lose by a mile because I built my own car, than lose by an inch, because someone else built it for me. Your car is your story, so don't let someone else write the book.
    http://www.grandprixforums.net/threads/76250-Jenny-(Picture-Heavy)/page2
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  10. #10 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    WAIT!!! i read that completely wrong. Your car has a/c but no heat? Correct? I thought i read it the other way.
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  11. #11 Re: Common AC Leak Points or Failure Grand Prix 
    honda owner. jerZcavy4120's Avatar
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    keep in mind i have dual zone, and i have almost heat on driver side and ice cube air on the other. BUT i have A/C. on both sides.
    Jenny, The '99 Silvermist GTP. With the mod's that matter.
    I would rather lose by a mile because I built my own car, than lose by an inch, because someone else built it for me. Your car is your story, so don't let someone else write the book.
    http://www.grandprixforums.net/threads/76250-Jenny-(Picture-Heavy)/page2
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  12. #12 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    i know absolutely nothing about the dual zone..im assuming its digital since your car is a 99
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  13. #13 Re: Common AC Leak Points or Failure Grand Prix 
    GXP Level Member Poil336's Avatar
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    probably a bad heater control valve, not letting coolant get into the heater core

    Quote Originally Posted by 4THGENCAMAROFAN View Post
    same thing happened to me...put die in let the a/c run for a while to circulate the die..never found a leak..but i always lose the freon...however once it gets down to like 15 psi it holds and doesnt go any lower..odd to me lol..im assuming its an o-ring that cant handle the high pressure but can handle the lower pressure.
    14.7psi is atmospheric pressure, it won't leak itself into a vacuum lol

    /threadjack.

    OP, if it's coming out to the point where you can hear it, i would imagine you could see the UV dye or notice a pretty big hole. a bad compressor would lead to no cold air, and it would also sound like sh!t. if you charge it and it blows cold, you probably just have a major leak instead of a broken part. you could try replacing the lines going in to and coming out of the compressor and then pulling a vacuum/charging/see if it works. just check all of your parts really well to make sure the leak isn't in the condenser, etc. i'd hate to do the same job twice
    Last edited by Poil336; 04-18-2011 at 11:43 PM.
    99 GT - top swapped, S2X cam. - sadly, sold
    96 Firebird Formula - T-tops and exhaust leak. 14.26 @ 97.8 - sold
    2008 Chevrolet Cobalt SS - stock, in all of it's turbocharged awesomeness
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  14. #14 Re: Common AC Leak Points or Failure Grand Prix 
    I AM PEWPIN! rynoman03's Avatar
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    Quote Originally Posted by 4THGENCAMAROFAN View Post
    hmmm..im gonna take my UV light tomorrow night and check there too..thanks for the idea Rynoman
    No Prob basically just follow the lines with a uv light and glasses wherever it goes you look. I hate HVAC BS. Mines not working again. Last time i had issues with it, it took me 600 bux to get it right again.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  15. #15 Re: Common AC Leak Points or Failure Grand Prix 
    GXP Level Member Poil336's Avatar
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    keep in mind that gauge pressures don't tell you a whole lot about the amount of refrigerant in a system just because of the nature of gases. if you really wanna test to see if you're low on refrigerant, open all the doors to give the system an infinate cooling load and listen to the compressor. if it cycles on and off quickly, you're low on refrigerant.
    Last edited by Poil336; 04-19-2011 at 12:09 AM. Reason: refrigerant is not equal to coolant
    99 GT - top swapped, S2X cam. - sadly, sold
    96 Firebird Formula - T-tops and exhaust leak. 14.26 @ 97.8 - sold
    2008 Chevrolet Cobalt SS - stock, in all of it's turbocharged awesomeness
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  16. #16 Re: Common AC Leak Points or Failure Grand Prix 
    GrandPrix Junkie PurpleGuy's Avatar
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    Quote Originally Posted by Poil336 View Post
    probably a bad heater control valve, not letting coolant get into the heater core



    14.7psi is atmospheric pressure, it won't leak itself into a vacuum lol
    HAHAAHAHAH WOOOOOWWWWW...no wonder, thats makes perfect sense..i NEVER thought of that...so long story short..im loosing ALL my freon lol..im soo dumb for not rememerbing that atmospheric pressure is 14.7
    2001 Regal GS, PLOG, 3" DP, 1.9's/L76 springs. 21* of timing on a 3.4"
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  17. #17 Re: Common AC Leak Points or Failure Grand Prix 
    I AM PEWPIN! rynoman03's Avatar
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    Quote Originally Posted by Poil336 View Post
    keep in mind that gauge pressures don't tell you a whole lot about the amount of refrigerant in a system just because of the nature of gases. if you really wanna test to see if you're low on coolant, open all the doors to give the system an infinate cooling load and listen to the compressor. if it cycles on and off quickly, you're low on refrigerant.
    Sh!t my compressor won't even turn on right now lol. But i'm not gonna hi-jack your thread man. Good luck!
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  18. #18 Re: Common AC Leak Points or Failure Grand Prix 
    GXP Level Member Poil336's Avatar
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    if you paid 600 bucks to get it fixed and it's not fixed, they owe you lol
    99 GT - top swapped, S2X cam. - sadly, sold
    96 Firebird Formula - T-tops and exhaust leak. 14.26 @ 97.8 - sold
    2008 Chevrolet Cobalt SS - stock, in all of it's turbocharged awesomeness
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  19. #19 Re: Common AC Leak Points or Failure Grand Prix 
    I AM PEWPIN! rynoman03's Avatar
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    Quote Originally Posted by Poil336 View Post
    if you paid 600 bucks to get it fixed and it's not fixed, they owe you lol
    This was done 5 years ago man. When i bought the car in 05 the a\c didn't work. I got it going later that year.
    1999 GTPHP Tuned, Ported SC/TB, 42#'s, SSAC's, ZZP Modded 1.9's/LS6 Springs/Manley's, TransGo Shift Kit, Poly Uppers, KYB GR2's/Springtech's. - 231k and traded it in. - Gone
    2000 GTP: XP, P&P'd Heads, N*\Lq4 MAF, GenV, 42#'s, PRJ Rails\FPR, Racetronix, TEP w/ 3.29 Gears, 300m, 7/8" chain, SSAC's. - Collecting dust in my garage.
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  20. #20 Re: Common AC Leak Points or Failure Grand Prix 
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    Quote Originally Posted by jerZcavy4120 View Post
    so what does it mean when your car has a/c but absolutely zero heat?
    Does the heat come on when you have it turned all the way up and does the DIC work? I had this same problem. My heater only worked when it was turned to the highest setting and my DIC didn't work. I replaced the ignition switch and it fixed both problems
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