No, I actually saw it running off the oil filter and cooler and
forming the puddle on the ground.  I did just have a thought about
the idea of stopping the engine after highway driving and a coolant
temp spike occurring.  Where is it hottest?   In the heads.  Could
the heat and pressure buildup have cause a small stream to spray out
of a head gasket?  Seems like it would have been easier for the
pressure to come out the cap.  I do get some very small cold weather
drips from the head gaskets.
Edward

At 08:05 PM 4/7/2010, you wrote:
>Was the coolant maybe from someone else previously in the spot?
>
>Just guessing.
>
>Jim
>
>On Wed, Apr 7, 2010 at 6:58 PM, Edward Maglott <emaglott3@gmail.com> wrote:
> > I checked my van tonight and this one time leak remains
> > mysterious.  I took the belt off the water pump.  The pulley has very
> > little play in it.  Almost none in and out along the shaft axis and
> > just a little click moving the pulley up and down.  That doesn't
> > really mean anything in terms of measurement, I know.  I will try at
> > some point to rig up a dial indicator to measure it.  the shaft turns
> > smoothly by hand with a little resistance.  I pressurized my cold
> > cooling system and got no leaking anywhere near the location that the
> > roadside leak occurred.
> > Puzzled-- Edward
> >
> > At 07:39 AM 4/6/2010, Ken Wilford wrote:
> >>
> >> I concur with Dennis.  It sounds like a water pump starting to leak
> >> to me.  They can be intermittent some times.  You need to get this
> >> checked out and repaired very soon as the pump can lock up and fry
> >> your engine in less than a couple of minutes.  Let me know if you
> >> need any parts.
> >>
> >> Ken Wilford
> >> John 3:16
> >> www.vanagain.com
> >>
> >>
> >> Edward Maglott wrote:
> >>>
> >>> 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
> >