I had driven for maybe 100 miles this morning, the last 20 or so on
the interstate.  I stopped at a rest area.  I usually let the engine
idle at least a minute in that situation because  I know it hates
that hard running then engine shut off scenario.  Well, I was in  a
hurry and shut off the engine.  I looked underneath to check for the
leaking ATF situation I've been having and to my horror there was
coolant dripping/running off of the oil filter and the oil
cooler.  It was probably a few ounces total.  I came back from the
restroom and set about finding what was up.  Looked from the top and
saw nothing.  Crawled under with flashlight and still could not see
anything in the way of a source of the leak.  started the engine and
revved it bit-  still nothing.  Coolant level was fine in both tanks
and the hose between them was secure.  I thought I heard what might
be water pump noise, but didn't take the belt off to check for play
in the shaft.

Drove the rest of the way (about 160 miles of interstate, including a
mtn climb) home with eagle eye on the gauge and light and frequent
stops to check for leaks.  Nothing.  I'm guessing that the temp
spiked when I didn't let it idle after the highway running and maybe
had a pressure spike.  What in the area above the oil cooler and
filter might cause this intermittent leak?  The weird part is that
after that one time it didn't continue leaking.

Edward