drip drip drip

[Taylor Clark <taylor@domain.elided>]

My 1974 Spider is exhibiting an interesting symptom in the cooling system.  
 When it gets hot, water seems to drip out from somewhere under the front 
center of the engine.  When it cools down it stops dripping.  It does not 
take long for the dripping to stop, maybe an hour or two. 

But even if I fill the radiator to the top, nothing much ever seems to flow 
to the expansion tank.  The inlet hole is exposed at the bottom.  

If I drive for a couple of days, I end up a quart or more down on 
antifreeze, and the car starts to run way to hot.  It usually runs under 
180F, with low water, it runs to almost 212F. 

My theory is that some seal is letting water out at a lower preasure than 
the preasure cap opens at and lets things into the expansion tank.  The cap 
mechanism seems to move ok, but my queston is - do I simply have a cap 
problem, or a water pump seal problem or what?

-Taylor Clark
 74 Spider Iniezione (can't be a Veloce, no carbs)
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