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if the coolant is disappearing but there is not external leak, then the ONLY possibility is an internal leak. 99.9999% of the time it is a head gasket.
by the way, the EGR (exhaust gas recirculation) valve has nothing to do with engine coolant.
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He's the best, of course, of all the worst.
Some wrong been done, he done it first. -fz
I jus' want ta thank you...falettinme...be mice elf...agin...
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