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Old 01-09-2012, 11:56 AM   #1
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Unexplained coolant loss

I've got an 89 GT and I'm experiencing an odd loss of coolant. After a few days the radiator will be half empty (half full for you optimists) but I can't seem to locate where it's going. The engine is running good. There is nothing leaking on the engine that I can see and I'm not leaving any puddles on the ground.
There is no water in the oil either.

I'd appreciate any advice on where it might possibly be going or what to look for. Thanks in advance for any help.

Dan...
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Old 01-09-2012, 12:05 PM   #2
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Any puddles or dampness on the passenger floor? Any white smoke when the engine is running or under acceleration?
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Old 01-09-2012, 12:11 PM   #3
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Re: Unexplained coolant loss

have u checked the plugs? i bet you got a pinhole leak near an exhaust valve on one of your head gaskets
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Old 01-09-2012, 02:35 PM   #4
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Re: Unexplained coolant loss

Ive heard of it misting out of the exhaust...not sure if thats your issue.
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Old 01-09-2012, 04:20 PM   #5
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Re: Unexplained coolant loss

Quote:
Originally Posted by svtlx View Post
have u checked the plugs? i bet you got a pinhole leak near an exhaust valve on one of your head gaskets

Agreed.
If it is not showing up anywhere then it is likely that you are burning it.
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Old 01-09-2012, 08:07 PM   #6
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look at the condition of the block plugs to make sure they are not rusted through. Also make sure your oil looks normal and not like chocolate milk.
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Old 01-09-2012, 10:52 PM   #7
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Re: Unexplained coolant loss

Well, I already checked the floor to make sure it wasn't the heater core. I just replaced it 2 years ago so it should be good.

Oil is perfectly clean and I don't see any white smoke from the tailpipes. I'll definitely check the plugs though and see how they look.
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Old 01-10-2012, 05:19 AM   #8
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Re: Unexplained coolant loss

might be intake manifold failing.
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Old 01-10-2012, 05:54 AM   #9
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Make sure it ain't building up to much pressure while your driving it and pushing it out of the vent hole in your overflow tank if u have one. I've seen them do that before
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