Thread: Coolant Leak Please help!!!

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  1. #1 Coolant Leak Please help!!! 
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    I have a 2001 Grand Prix GTP 3.8l SCI have a coolant leak between the engine and transmission could anyone point out to me what it could be? I am new to this engine and have no clue? Intake gasket?, Crank seal? frost plug? There is no sign of a leak on the top of the engine. I have changed the elbows on the tensioner. Please if anyone could help!
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  2. #2 Re: Coolant Leak Please help!!! 
    WHERES THE LAMB SAUCE?!?! Matt Palm's Avatar
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    most likley the lim gasket
    dhp tune, sd lip, shiny stuffs, retros, gen 2 spoiler, gpo's, pregens
    http://www.grandprixforums.net/showthread.php?t=75198
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  3. #3 Re: Coolant Leak Please help!!! 
    Moderator dsmuts's Avatar
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    thermostat housing maybe. Take a pic of where it's leaking.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  4. #4 Re: Coolant Leak Please help!!! 
    GTX Level Member mofford12's Avatar
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    i bet its the lim gasket.. mine also leaked on that side
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  5. #5 Re: Coolant Leak Please help!!! 
    GrandPrix Junkie NegativeOne13's Avatar
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    Step one... clean area.

    Step two... inspect and give us a better idea.... or even better pictures!

    LIM gaskets, t-stat housing, LIM coolant passage gasket.... take your pick.

    And smile it's Blacktooth Grin!
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  6. #6 Re: Coolant Leak Please help!!! 
    Killa Bee Scottydoggs's Avatar
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    are you sure its coming from between the engine and trans? if so that would be a freeze plug, and your either pulling the engine or tranny to change it.

    or it could be a heater core hose leaking, but that would leak down the fire wall behind the tranny and hit the down pipe.

    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: Coolant Leak Please help!!! 
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    It's the lim/uim gasket.
    Thats what I have right now caused my car hydrolock

    u better fix it ASAP
    Grand Prix gt 1999 v6 3.8L coupe.
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  8. #8 Re: Coolant Leak Please help!!! 
    Moderator dsmuts's Avatar
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    Uim you mean sc?
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  9. #9 Re: Coolant Leak Please help!!! 
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    Where is this lim gasket does anyone have a picture? Is that a lower intake gasket?
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  10. #10 Re: Coolant Leak Please help!!! 
    Moderator dsmuts's Avatar
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    Lower intake manifold gasket. Take a pic of where it's leaking.
    98 GTP modded 1.9's, sd headers, 3.4", zzp 1.0 230K miles scrapped.
    04 Comp G zzp stb's, UMI ta's, Speedbuilt sways, bully flo heads, XP, zzp headers, fsic, thrasher shift kit, 60#, 2.6" corsa 2.5", Inferno hood
    01 gt z7 turbo tep trans zzp motor
    08 g8 gt cam exhaust 11.87@118
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  11. #11 Re: Coolant Leak Please help!!! 
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    There is no sign of coolant on the top of the engine when I pressure test it the Coolant system the coolant leaks out from the bottom of the engine where the engine and trans join.
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