Thread: Coolant leak on 2002 Grand Prix GT 3800

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  1. #1 Coolant leak on 2002 Grand Prix GT 3800 
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    Hi there....my daughter emailed me about a coolant leak on her GP. Her boyfriends father says he thinks that a hose is "missing". He put some duct tape over the leak to keep it from spraying all over. Before I make the trip there to see if its something I can fix myself, I asked her to take a few pics so I could narrow it down. Can anyone tell me what I may be looking at here? Is it maybe a heater line connecting to the water pump housing?
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  2. #2 Re: Coolant leak on 2002 Grand Prix GT 3800 
    GrandPrix Junkie Bluemagic's Avatar
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    Coolant elbow. Be sure to replace them with the aluminum ones
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  3. #3 Re: Coolant leak on 2002 Grand Prix GT 3800 
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    THanks for the quick reply! I haven't changed one of these before, how much of a pain is it? THat piece with the duct tape on it, does that just pull out of that housing? I assume that there is a loose heater hose flapping around in there somewhere?
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  4. #4 Re: Coolant leak on 2002 Grand Prix GT 3800 
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    In order to get to that your gonna have to remove the alternator, the alternator bracket and the accessory belt I believe
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  5. #5 Re: Coolant leak on 2002 Grand Prix GT 3800 
    Killa Bee Scottydoggs's Avatar
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    http://www.grandprixforums.net/threa...coolant-elbows here ya go, full tool list and all.

    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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  6. #6 Re: Coolant leak on 2002 Grand Prix GT 3800 
    GTX Level Member SnowTh1ef's Avatar
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    Quote Originally Posted by whiteta View Post
    THanks for the quick reply! I haven't changed one of these before, how much of a pain is it? THat piece with the duct tape on it, does that just pull out of that housing? I assume that there is a loose heater hose flapping around in there somewhere?

    That is the heater hose. Remove alternator, remove alternator bracket. Pull and wiggle. there are 2 platic elbows like that that crack and leak. Replace with new style aluminum elbows. Do NOT use RTV or any other sealant. the orings seal just fine.
    04 GTP -HAI, 1.9 rockers.
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  7. #7 Re: Coolant leak on 2002 Grand Prix GT 3800 
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    04 GTP -HAI, 1.9 rockers.
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  8. #8 Re: Coolant leak on 2002 Grand Prix GT 3800 
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    THat is a lot of awesome information, thanks all! I will get the metal ones and get ready for some fun!
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  9. #9 Re: Coolant leak on 2002 Grand Prix GT 3800 
    Killa Bee Scottydoggs's Avatar
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    just make sure all 4 holes are cleaned out real good. you'll see a layer of crud thats filmed up inside the holes. i was albe to chip it off my holes with a pick.

    its a easy repair, 12 bucks for elbows and a jug of coolant. good time to flush the coolant if its not been done. being its 1/2 flushed already.

    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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