C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

coolant leak

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Old Mar 28, 2014 | 05:59 PM
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90 l98 surge tank level drops coolant overflow tank level does not change no vacuum pressure tested 16# held all night dropped hush panel no sign of coolant no coolant smell out of exhaust no warter on oil dipstick no fogging window no leaks on floor thank you for any help will pressure test again #7 plug fouled bad head gasket

Last edited by amowry; Apr 9, 2014 at 05:38 PM. Reason: update
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Old Mar 28, 2014 | 09:26 PM
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How much are you loosing ? Could go out exhaust and not smell if small amount. I had a leak on rad and didnt know it till i pulled it out, so small it never hit ground.
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Old Mar 29, 2014 | 05:05 AM
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Originally Posted by Loopidoo
How much are you loosing ? Could go out exhaust and not smell if small amount. I had a leak on rad and didnt know it till i pulled it out, so small it never hit ground.
thanks for reply I am starting to think pinhole leak under pressure loss depends on miles but the coolant overflow tank never changes level
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