BTW.. Yhis is a big truck, F700, and I also replaced the top tank on (made
of plastic) as it has some small cracks in it. The two other tanks (center
and the lower cooler tank show no signs of leaks and I am not loosing any
coolant even thru the overflow hose which it would do if the cap was weak.
Later today the mech guage should give a clearer pic. And the UPPER range
of Normal isn't normal:) L is the step before it pegs
Leo
-----Original Message-----
From: spridgets-bounces@autox.team.net
[mailto:spridgets-bounces@autox.team.net] On Behalf Of Jim Johnson
Sent: Sunday, July 10, 2011 11:55 PM
Cc: Spridgets
Subject: Re: [Spridgets] High engine temp NON Spridget
Leo...
Check the radiator cap. Is it sealing properly? Could there be a pin hole
leak somewhere in the hoses or radiator? These are pressurized systems. If
the pressure is too low (leak somewhere), they will overheat. Especially
under load.
Cheers!!
Jim
On Sun, Jul 10, 2011 at 11:09 PM, Leo <60bugeye@cebridge.net> 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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--
Cheers!!
Jim Johnson
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