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#1099933 - 03/06/08 08:26 AM 96-98 chevy lumina coolant leak question
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
hey guys my lil brother who is going to school up in Buffalo, NY has a coolant leak and cant figure out what is going on. here is the story..

he is adding a resevoir's worth of anitfreeze (dexcool) every 3-5 days.. here in NC the leak was much less but up there since (what he thinks) is since he has to run the heat so much he is noticing it leaking more. he doesnt know squat about cars... i told him to look for it leaking on the ground and let me know something...

he says it really leaks when the defrost is on (when thermo is on hot) to me that doesnt make sense.. can anyone chime in on this? he is 12 hours away and he doesnt have time nor the $ to have someone look at it. thanks guys
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02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
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#1099934 - 03/06/08 08:27 AM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
btw he just had (before he left NC back in july of 2007) his radiator flushed and etc.. i double checked it when he left and all was well.
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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#1099967 - 03/06/08 09:09 AM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
WishIhadatruck Offline


Registered: 05/09/06
Posts: 1249
Loc: Grand Rapids, MI
If it isn't leaking on the ground, it could be leaking internally. Is there a white cloud from the exhaust or is the oil way over full? That is a large leak if he is losing that much.
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#1099976 - 03/06/08 09:24 AM Re: 96-98 chevy lumina coolant leak question [Re: WishIhadatruck]
Drew99GT Offline


Registered: 10/11/02
Posts: 20514
Loc: Colorado Springs
96-98 Lumina? 3.1L?

INTAKE MANIFOLD GASKETs!

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#1099978 - 03/06/08 09:27 AM Re: 96-98 chevy lumina coolant leak question [Re: Drew99GT]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
i was afaid of the intake manifold gaskets.. how much is that to fix??

he is going to get back to me about finding leaks under the car, there is snow on the ground so it should be obvious if it is leaking externally.
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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#1100063 - 03/06/08 11:44 AM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
Drew99GT Offline


Registered: 10/11/02
Posts: 20514
Loc: Colorado Springs
It'll cost between $500 to $800 depending. Make sure you purchase problem solver gaskets by fel pro.

Things to check: look under the oil cap fore signs of moisture - a white pinkish milky glop. Also, shine a flashlight into the oil filler and look at the oil on top of the head - it'll likely have that same moisture/antifreeze laden look (a reservoir's worth of coolant loss every week is a ton!). Also, they leak externally - shine a flashlight around the area under the thermostat housing - you'll likely see antifreeze.

Get it done ASAP! In fact, I wouldn't drive the car. That's a big leak and is likely to do damage to the motor.

Good luck!

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#1100064 - 03/06/08 11:44 AM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
Squishy Offline


Registered: 04/05/07
Posts: 287
Loc: Orillia, Ontario
If it really is related to heat and not just in his head, you could be looking at a leaking heater core. Usually accompanied by a wet carpet.
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#1100076 - 03/06/08 12:10 PM Re: 96-98 chevy lumina coolant leak question [Re: Squishy]
Drew99GT Offline


Registered: 10/11/02
Posts: 20514
Loc: Colorado Springs
If it was leaking a couple pints a week through the heater core, it would stink of antifreeze in the cabin and the windows would be foggy I think.

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#1100275 - 03/06/08 04:56 PM Re: 96-98 chevy lumina coolant leak question [Re: Drew99GT]
onion Offline


Registered: 02/04/07
Posts: 2097
Loc: kansastan
Likely it's intake gaskets. +1 on everything Drew said.

Have him check for coolant in the oil. If there's any sign, he'd better quit driving it NOW. Coolant in the oil can take out bearings real quick.
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#1100605 - 03/07/08 07:58 AM Re: 96-98 chevy lumina coolant leak question [Re: Squishy]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
 Originally Posted By: Squishy
If it really is related to heat and not just in his head, you could be looking at a leaking heater core. Usually accompanied by a wet carpet.


thats not it, you would smell it too and i asked him about that and he said no
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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#1100617 - 03/07/08 08:08 AM Re: 96-98 chevy lumina coolant leak question [Re: Drew99GT]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
 Originally Posted By: Drew99GT
It'll cost between $500 to $800 depending. Make sure you purchase problem solver gaskets by fel pro.

Things to check: look under the oil cap fore signs of moisture - a white pinkish milky glop. Also, shine a flashlight into the oil filler and look at the oil on top of the head - it'll likely have that same moisture/antifreeze laden look (a reservoir's worth of coolant loss every week is a ton!). Also, they leak externally - shine a flashlight around the area under the thermostat housing - you'll likely see antifreeze.

Get it done ASAP! In fact, I wouldn't drive the car. That's a big leak and is likely to do damage to the motor.

Good luck!


thanks man i relayed the message to him but he is flying back here (NC) this evening and wont have time to check he car till next week when he goes back to Buffalo... ill get back to this when i find out more... here i thought that car was a good one.. leave it to american made vehicles to be [censored]. argh
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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#1100645 - 03/07/08 08:54 AM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
Chris142 Offline


Registered: 06/05/03
Posts: 11052
Loc: apple valley, ca
I have never seen an intake manifold leak that much coolant. Usually it's just a small seep. I'm betting on a hose, water pump or worse.
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#1100724 - 03/07/08 11:08 AM Re: 96-98 chevy lumina coolant leak question [Re: Chris142]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
chris, this is what i am hoping on. the upper and lower hose were supposed to have been replaced before leaving. along with the water pump. as a matter of fact ill call the chevy place that my parents used to work on his car before he left.

OH btw he said he knew when his coolant was geting low bc his gas mileage would start to suck.. if that helps any
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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#1100753 - 03/07/08 12:05 PM Re: 96-98 chevy lumina coolant leak question [Re: mikeg5]
dwendt44 Offline


Registered: 05/17/06
Posts: 3571
Loc: Central Wisconsin
Some GMs have three other hoses coming off the engine.
Heater hoses of course, but I've got a small hose as well
(bleed) that I replaced a while back.
The radiator itself could have a small leakage as well; only leaking when at speed. BTDT too.
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#1100801 - 03/07/08 01:12 PM Re: 96-98 chevy lumina coolant leak question [Re: dwendt44]
mikeg5 Offline


Registered: 06/18/07
Posts: 1754
Loc: north carolina
the only thing that was done at the shop before he went to buffalo was a coolant flush and the upper and lower radiator hose replaced. thats it
_________________________
02 Toyota Tacoma 4 door 3.4 v6 4X4
150k miles. Amsoil in the diffies and tranny
05 Corrola LE 145k miles auto

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