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  1. #1
    Member
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    Aug 2005
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    Eastpointe, MI
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    Pewter Metallic
    2001 Trans Am WS.6

    strange coolant leak

    I have a feeling its the water pump, but I am hoping not since I just replaced it like 2-3 years ago. Basically, it leaks a little or a lot, and not all the time. Its the puddle mainly forms from around under the thermostat housing. This is some evidence of coolant up top, just beneath the throttle body as well. Dried coolant, and wet as well, depending. But for all i know its being flung up there. The leak is large enough to cause a decent sized puddle, yet small enough that I can't really tell where its dripping from. Any ideas? I'm going to borrow a pressure tester from a coworker when i go back after the new year, if I still havent figure it out. Its a 01 WS6, water pump was replaced within the last 2-3 years, same with t-stat.

  2. #2
    11 years of bangin gears cammed goat's Avatar
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    11,496

    Phantom Black Metallic
    2004 GTO M6

    Test the system and let us know what you find. Could be the thermostat gasket, loose thermostat housing or hose. Start small but be prepared for something big.

  3. #3
    Veteran pajeff02's Avatar
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    Black & Blue
    '02 WS.6 / '07 Suburban

    How about a leaking thermostat housing?

  4. #4
    Retired NOT tired SteveC's Avatar
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    SOM
    2001 Z28 (Sara)

    I am pushing at straws here, is there not a line or hose that carries coolant through the throttle body? Is it possible that it can be loose causing the leak?

    I would appreciate it if anyone can comment on this.

    SteveC

  5. #5
    Former Mopar Man 2002ssslp's Avatar
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    Silver & Blue
    02 Camaro SS, 04 GTO

    Pressure test the system and stop guessing. Water will always follow a path downward so you need to see where it begins. Good luck.
    My ride is a 2002 Camaro SS SLP #3296 with 30k, LTH, 3" Y, CME, Frost tune, K&N, ported TB, Blackwing lid, Bellows, MSD, Denso Iridium, and 85mm MAF, Bilsteins, Eibach springs, SLP strut brace, Adj. Panhard, TA Girdle, UMI, Pro 5.0, Nitto NT555
    My wife has a 2004 GTO with the rare SAP, 18" wheels, K&N Cold Air System, MSD, Ported TB, Frost tune, Denso Iridium, Flowmaster cat-back, 3200 Yank, 75k

  6. #6
    Junior Member chevuman260's Avatar
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    Nov 2011
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    fort wayne indiana
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    white
    2001 Z28

    Quote Originally Posted by SteveC View Post
    I am pushing at straws here, is there not a line or hose that carries coolant through the throttle body? Is it possible that it can be loose causing the leak?

    I would appreciate it if anyone can comment on this.

    SteveC
    You are correct. This can be bypassed but it is there to prevent the throttle blade from freezing during winter.

    I am with everyone else. Pressure test it to see where the leak is coming from before throwing parts at it.
    2001 Camaro Z28 - AFR210 V2 Heads, JPH Cam, Fast 102mm intake, TS 100mm MAF, NW 102 TB, FTP 104mm lid, kooks 1 3/4 Long tubes, custom Y pipe w/dump, BMR LCA,TQ. Arm,PH bar, lca bracket,k member, Upper/Lower A arms, AFCO shocks
    11.20@120MPH
    459 RWHP and 410 RWTQ

    2009 Stryker Blue Pontiac G8 GT

  7. #7
    Member
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    Pewter Metallic
    2001 Trans Am WS.6

    I'm going to pick up the pressure tester next week when I go back to work. Its cold and snowing here now so I'm not driving it anyway.

  8. #8
    Veteran pajeff02's Avatar
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    Black & Blue
    '02 WS.6 / '07 Suburban

    Don't go overboard with the pressure tester -- you don't want to rupture something. Run it up to 10-12 lbs and see what happens. If you don't find anything after a bit, increase the pressure, but don't exceed 16 psi for the test.

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