As some of you know, I have been fighting a leak that I have been unable to
find.  It appears to be somewhere around the #4 plug (possibly the head stud
cap nut) but the only time it seems to leak is when the engine is hot and I
am driving at 65-70mph.  The leak is intermittant.  Over 150 miles, it leaks
from the full mark in the overflow tank to the minimum mark.  I am still
getting 22+mpg and this includes driving up a 6 degree grade every day (home
to work and back is 150 miles).  The problem with this leak is that the
coolent is getting all over the idle stabelizer and the other wiring and
electronics at the front part of the engine compartment where the suspect
leak is at the back of the engine compartment.  I am guessing that the air
currents around the back of the engine are throwing the coolent to the front
of the engine compartment.  The engine cover is saturated in the driver side
front corner.  It does not appear to be any of the hoses.  The hoses are
getting wet from obvious dripping down.  One side of the spark plug wires
(the side toward the rear of the vehicle) is wet from the coolent.  Also,
the top of the engine (where the head gasket is) appears to be basically dry
so there is no indication of a gasket leak.

Those are the symptoms.  Right now I don't have any other way to test this
other than driving and then looking.  Has anyone had this type of problem
before?  I am looking for ways to localize this so I know if it is something
that I can repair or I will have to do the heads.

William