Ambient Temp 22 in the garage. Nice day.
Testing at idle with a/c off.
After 6 minutes
Dash board Temp gauge at 9 o'clock
IPK reports 75 degrees
At 14 minutes
Temp hits 100
Fan starts
At 17 minutes
Temp hits 106
Fan increases speed
At 22 minute mark
Temp at 112
Fan increases speed
At 28 minutes
Temp 116
Dash gauge starts to move above 9 o'clock
Shutdown.
I have the front bumper off and the air box removed (I was getting ready to do the keyhole method of stat change) and with such good access I can see no leaks.
At least the thing isn't spraying water from around the cap. So that's a positive
The thermostat housing isn't leaking but it sure seems like a stuck thermostat.
Ah well...I was halfway done toward replacing it anyway.