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Help. C5 leaking coolant in big amounts.

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Old 09-07-2015, 06:34 PM
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Logiieee
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Default Help. C5 leaking coolant in big amounts.

My 100,XXX mile Vette is leaking coolant from the right passenger side tire towards the bumper. I can't exactly tell where from because it drips down. Any ideas where it could be coming from? If so, how can I fix this problem? I'd say about a small cup full leaks everytime I refill the coolant.
Old 09-07-2015, 06:55 PM
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minitech
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There is a cold coolent level mark on the overflow bottle. Can see it on the bottle itself. Check the level when it is stone cold. Maybe it is just over filled and leaking the excess out when it is warm.
Old 09-07-2015, 07:08 PM
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c4cruiser
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It might be a leak in the expansion tank itself. Also check the hoses under the tank; possibly a split hose or loose clamp.
Old 09-07-2015, 07:13 PM
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Vetteman Jack
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The coolant tank has a plastic nipple that has been known to become brittle, crack and leak coolant. It is located on the underside of the tank. I would check that place as well as the hoses that run in that area - there are several.
Old 09-07-2015, 07:18 PM
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stu12dozen
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It isn't easy to determine where a coolant leak is coming from. The only way to know for sure is by doing a pressure test.

Last edited by stu12dozen; 09-07-2015 at 07:24 PM.
Old 09-07-2015, 07:40 PM
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JR-01
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Originally Posted by stu12dozen
It isn't easy to determine where a coolant leak is coming from. The only way to know for sure is by doing a pressure test.
Yes. My GMC pickup had a leak and I would be dammed if I could find it. Took it to the shop, they pressurized the system and found it in a minute. It was the radiator, itself.
Old 09-08-2015, 11:29 AM
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side tanks on the radiator are plastic. they crack. had mine replaced once...at a lot fewer miles than 100k

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