Thread: whats causing this coolant leak?

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  1. #1 whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Today i look under my car on the driveway and see i lost a nice batch of coolant. Cant quite pinpoint exactly where its coming from but i see a couple of hanging drips right at the rear of thesubframe on passenger side like to the left and behind the Trans pan. My first thought was lower coolant elbow or heater core lines but idk. Any ideas?
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  2. #2 Re: whats causing this coolant leak? 
    I live here. stealthee's Avatar
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    Sounds like coolant elbow to me. Probably want to wipe everything off, then start the car and looking for leakage/seepage.


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  3. #3 Re: whats causing this coolant leak? 
    Killa Bee Scottydoggs's Avatar
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    or the water pump.

    you can grab the pulley with 2 hands and rock it back and fourth, if it moves thats the leak.

    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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  4. #4 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Well if it was the water pump wouldn't i have squeeky belt?
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  5. #5 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    I have somehwhat of an idea,i believe it may be the lower elbow. I have the car on ramps and went under,cant see the lower elbow but the leak is coming from somewhere next to and a lil above the oil filter area.
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  6. #6 Re: whats causing this coolant leak? 
    Killa Bee Scottydoggs's Avatar
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    car off, you can stick your fingers in where the lower elbow meets the engine. just follow the heater hose tube down the alt bracket, follow it in. if its leaking it will be wet back there.

    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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  7. #7 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Well checked all in there with the coolant res. out the way and its neither wp nor lower elbow. This is weird now.
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  8. #8 Re: whats causing this coolant leak? 
    I live here. 02NavyBlue's Avatar
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    I was having the same issue, WP and both elbows were dry, yet coolant was directly under that spot. I just let it leak until i wasn't allowed to park in the drive anymore..lol. Then took it to work and all of a sudden my upper coolant elbow started leaking and my boss was like, thats it right there. (even though it was bone dry when it was leaking before, so i had 2 coolant leaks then) We replace the elbows and I tell my parents we fixed a leak, there are still puddles on the driveway appearing, I'm assuming my car is still leaking. oh well, I'll look into it when the weather isn't so brutal. It doesn't always leak, just sometimes. Cannot find the source though.
    2006 Grand Prix GT S/C 109k - Modded Transgo Shift Kit, Gutted Airbox, Dash Cam, and Inlays. Retros soon to come.
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  9. #9 Re: whats causing this coolant leak? 
    GTP Level Member buck531's Avatar
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    Check the two heater hoes that go into the tensioner. I replaced my sons tensioner for the 3rd time last weekend and he was still dripping coolant. One of the o-rings were seeping. Cheap easy fix. I did it in 20 degree weather while it was snowing in shorts .
    03 GS - SSAC, AEM wb, PT,SR rockers, Gen 3, 3.4, dynotech trans w/ 3.29's.

    87 Fiero GT. L67 Swap. XP, ported heads/sc. N* TB, FSIC, 2.8, 12.018 @ 113 1.71 60'.
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  10. #10 Re: whats causing this coolant leak? 
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    Get the car up to operating temp. It might only leak when your thermostat is open. Get the car warmed up and the thermostat open then check for leaks. From the amount you're talking about it should be easy to find.
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  11. #11 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Apparently its the wp weephole,mechanic checked it. But.this leak has a mind of its own. Barely anything now in 2 days although i did take stuff apart yesterday.
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  12. #12 Re: whats causing this coolant leak? 
    SE Level Member FASGP's Avatar
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    Waterpump is done then...if it is intermittent, it may leave you stranded one of these times...

    Vtec...All the lag and none the turbo...it's like waiting for bad sex
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  13. #13 Re: whats causing this coolant leak? 
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    ^X2
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  14. #14 Re: whats causing this coolant leak? 
    I live here. stealthee's Avatar
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    My water pump leak was random too. Then one day started leaking like a sieve. Do it now. Its not all that hard and not all that expensive.


    2011 Mitsubishi Lancer GTS - DD mode
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  15. #15 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Can anyone explain this to me, since that leak 2days ago my AC/heat has been on and off not working.?
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  16. #16 Re: whats causing this coolant leak? 
    Killa Bee Scottydoggs's Avatar
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    Quote Originally Posted by dmahlikGT View Post
    Can anyone explain this to me, since that leak 2days ago my AC/heat has been on and off not working.?


    in what way does it not work? no blower fan?


    and sounds like the water pump. they do leak when they feel like it, off and on for some time till they let go all the way.

    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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  17. #17 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    I flick the heat or AC on high and i hear the condenser click on but nothing blows out at all right away. Takes a few minutes sometimes or a couple tries turning it on or off.
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  18. #18 Re: whats causing this coolant leak? 
    Killa Bee Scottydoggs's Avatar
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    thats the compressor you hear clicking on. and it sounds like your fan is crapping out. unrelated to the coolant leak for sure.

    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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  19. #19 Re: whats causing this coolant leak? 
    GTP Level Member dmahlikGT's Avatar
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    Ok yea i meant compressor,well damn i just got too many problems at hand lol.
    04 GTP-3.6 pulley, custom tuned, Intake, headers,thrush exhaust, al104 plugs, 180* stat, shift kit, flipped mounts

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  20. #20 Re: whats causing this coolant leak? 
    Killa Bee Scottydoggs's Avatar
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    you just need to hold on and wait for the 3 rd thing to go bad soon, this crap happens in lots of 3 most of the time lol

    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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