Thread: Coolant Leak, Not LIM

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  1. #1 Coolant Leak, Not LIM 
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    Ok so im becoming very frustrated. After changing the lim, and waterpump, along with various other random things, youd think id be leak free for the most part. Nope. Getting big piles of coolant seemingly randomly.

    I spy coolant on the power steering cap. I was almost certain it was the waterpump, but apparently not because its still happening even after that has been changed. Any ideas?
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  2. #2 Re: Coolant Leak, Not LIM 
    GTP Level Member BlackGT97's Avatar
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    is it weeping out of one of the Timing cover bolt holes possibly?
    1997 Grand prix GT Black Coupe- The beater
    1998 Grand prix GT Black coupe- Top swapped, XP cam
    2008 Grand prix Midnight blue- The slow but nice car
    1999 Chevrolet Silverado red ext. Cab
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  3. #3 Re: Coolant Leak, Not LIM 
    GrandPrix Junkie
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    Are one of the heater hoses leaking? Those are back there above the power steering res.
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  4. #4 Re: Coolant Leak, Not LIM 
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    No idea about the bolt. And i dont think any hoses are leaking...

    But to add, it only happens every once in a while. When it does, itll just be like a pint of coolant on the ground.
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  5. #5 Re: Coolant Leak, Not LIM 
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    Anyone else feel free to chime in.
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  6. #6 Re: Coolant Leak, Not LIM 
    I live here. TLSheff's Avatar
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    Quote Originally Posted by PioneerGTP View Post
    After changing the lim, and waterpump, along with various other random things, youd think id be leak free for the most part. Nope.
    Among the "various other random things" did you replace the 2 90* elbows? I'd imagine you would have while doing the LIM, but if not... could be.

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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  7. #7 Re: Coolant Leak, Not LIM 
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    Yep. Replaced the elbows, waterpump, sealed the gaskets, hoses dont seem to be wet.
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  8. #8 Re: Coolant Leak, Not LIM 
    I live here. TLSheff's Avatar
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    Is there a chance its leaking out at the over-flow container? or is it wet on the motor?

    The level sensor in the container has a rubber grommet that could have worn out and be leaking, or a crack causing a drip. Worth a check just to rule it out.

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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  9. #9 Re: Coolant Leak, Not LIM 
    Killa Bee Scottydoggs's Avatar
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    im with the heater core hoses where they mount at the alt bracket, take a paper towel, and test for wetness when the car is good and hot. because thats when hoses leak most often, when under pressure.


    if thats dry. id drop some dye in the rad and then hunt for the source.

    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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  10. #10 Re: Coolant Leak, Not LIM 
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    Maybe have the system pressure tested at a shop. It may make the leak show up then.
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  11. #11 Re: Coolant Leak, Not LIM 
    GTX Level Member dbextreme's Avatar
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    I went through 3 sets of elbows in 2 months. They would work for a while then leak a bit, stop then start again. Sometimes the coolant would just burn on the motor and I never saw it hit the ground, other times it would leave little puddles. Come to find out it was me doing a poor install job regarding the elbows. take your finger and rub all over both elbows to see if they are wet. Finally I used 2000 grit sandpaper and cleaned the holes the elbows go into the best I could then I rubbed a little 3in1 oil in the holes before I reinstalled them so the oring would not shift. Never leaked again.
    1999 GPGT - L26, Ported Top Swap, XP Cam, 3.2 MPS, 42.5#, N*, LQ4, SD Headers, Double Roller, TEP Race Trans w/Stand alone Cooler, Precision Industries 3000RPM Stall, 75 Shot Nitrous Express Proton Kit w/Purge, 3" Dual Borla Pro XS, Corsa Dual 3.5 Tips, 5% Tint
    1995 Firebird Formula - Under the Knife
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  12. #12 Re: Coolant Leak, Not LIM 
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    Same issue as dbextreme here. My final solution was ponying up for the stock ones from the dealer and RTV silicone. No leaks since. Those elbows can be a frustrating pain in the a$$.
    2004 GT2 Leather, Sunroof, heated seats, other stuff, but only a little DIC. Also, Kawi Vulcan 2000 http://tinyurl.com/ophidia
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  13. #13 Re: Coolant Leak, Not LIM 
    I live here. TLSheff's Avatar
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    A little KY goes along way.

    Quote Originally Posted by AmericanSoldier View Post
    ...not scanning/monitoring your motor is like bangin a hooker and you just HOPE your not infected.
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  14. #14 Re: Coolant Leak, Not LIM 
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    Ill check the elbows again and more thoroughly. Ill report back too.
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  15. #15 Re: Coolant Leak, Not LIM 
    Turbo is the way to go. BillBoost37's Avatar
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    To the guys that went through a few. Dorman did have a bad batch. Maybe that was your issue?
    I drink..so consider that when reading my posts.

    2010 Audi A6 Dual IC's
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  16. #16 Re: Coolant Leak, Not LIM 
    GTX Level Member dbextreme's Avatar
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    Aluminum now!! don't want no stinkin plastic ones.... LOL
    1999 GPGT - L26, Ported Top Swap, XP Cam, 3.2 MPS, 42.5#, N*, LQ4, SD Headers, Double Roller, TEP Race Trans w/Stand alone Cooler, Precision Industries 3000RPM Stall, 75 Shot Nitrous Express Proton Kit w/Purge, 3" Dual Borla Pro XS, Corsa Dual 3.5 Tips, 5% Tint
    1995 Firebird Formula - Under the Knife
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  17. #17 Re: Coolant Leak, Not LIM 
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    Is it possible it's the O rings inside the hoses by the power steering? lol. The elbows werent leaking.
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  18. #18 Re: Coolant Leak, Not LIM 
    Killa Bee Scottydoggs's Avatar
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    you can check the heater hoses off the back of the alt bracket, thats where the coolant flows to via them dumb elbows.

    a soggy hose end will leak, seen it first hand. some times you can cut the hose a bit shorter and put it back on. if its all swollen at the end.

    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: Coolant Leak, Not LIM 
    GTX Level Member dbextreme's Avatar
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    When you changed your waterpump, did you put thread sealant on the bolts?
    1999 GPGT - L26, Ported Top Swap, XP Cam, 3.2 MPS, 42.5#, N*, LQ4, SD Headers, Double Roller, TEP Race Trans w/Stand alone Cooler, Precision Industries 3000RPM Stall, 75 Shot Nitrous Express Proton Kit w/Purge, 3" Dual Borla Pro XS, Corsa Dual 3.5 Tips, 5% Tint
    1995 Firebird Formula - Under the Knife
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