[Spridgets] High engine temp NON Spridget

[Leo]

In between dr visits and stuff I am trying to fix a problem on a 1998 F700
Box truck with a 7.0 (429) MFI engine.  The truch as set for 6 months before
I got it and had to do a major tune up, new in tank fuel pump and I nstalled
new thermostats (has two, 165 degree and 180 degree.  Truck runs great now
except for one isse.  It cam idle for hours and the temp never gets above O
on the normal on the guage.  Drive it 2 or 3 miles and the reading gets up
to the A on normal.  Radiator was clean inside, no crud flushed out of the
block, and has 50/50 antifreexe mix in it.  Soooo.. Where would all of you
start on trying to isolate the problem.  Tomorrow I am going to install an
aftermarket temp guage to get an exat temperature reading.  If it is high
then what next?  If it had a blown headgasket wouldn't I see water in the
oil or oil in the radiator?  It never makes the 13lb cap spew wter and I
haven't pushed it that far anyways.  Ideas and possible causes and trouble
shooting ideas would be appreciated greatly

 

Leo