Quote:
Originally Posted by teoman
Why would it fill up with water?
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For the same reason that it's possible to boil water in a paper cup.
That piping you're using is not going to be at a uniform temperature. At the very least, due to the constant flow of air past your EGR entry point, that is going to be at intake air temperature. The steam you create is going to condense downstream of the boiling point where the copper pipe is wrapped around your exhaust manifold, and unless you managed to place your exhaust above your intake, your piping will eventually fill up with hot water.
But, hey, I could be wrong.