hmm.. air pocket or worn impeller ?
Lester
On Jul 10, 2011, at 11:09 PM, Leo wrote:
> 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
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