>I'd still like an answer to this question.  Does anyone have an opinion here?
>I took the heater core in the house -- it was dry.  Hooked it up to a 
>faucet and kept everything dry.  I ran hot water through it until it was 
>good and hot and then plugged up the outlet.  There was no air or water 
>coming from the core.  Is this a good enough test?  Was that enough 
>pressure?  House water temperature is probably 120F.

Another way to check for leaks is to plug the inlet and outlet holes and 
drop the core in a bowl of hot water. Air will bubble out of any small holes 
that you wouldn't otherwise notice.

Andy E.

A.C.Erskine@lut.ac.uk