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|6.0L Power Stroke Engine and Drivetrain Discussion of the 6.0L Power Stroke diesel engine and drivetrain in the 2003-Up Super Duties and Excursions. No gas engine discussion allowed except on transmissions and drivetrain that pertain to all models. Please confine discussion of topics in this forum to those items that are specific to the 6.0L Power Stroke engine.|
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I too had that exact same problem with my 03 6.0l. When the engine temp. was normal and the truck was brought down to an idle, it was just like the a/c was turned on. Only noticed this problem during the cooler weather.
Truck was constantly using a small amount of antifreeze and would never stay at the "new" fullmark. Also appeared that the engine temperature would reach "normal operating" range a little faster than normal.
I bought a digital thermometer and kept track of the temperature coming out of the vents in the cab. Temperature would drop by 40 deg F when the truck was at an idle and temperature out of heater vents didn't seem to correlate with engine temp?
Ford did some "cooling system" tests which they determined that the head gaskets were in fact leaking (cooling system would overpressurize under acceleration). Ford had changed out the EGR cooler a few months previously to try to resolve this issue also.
Now with new head gaskets, problem is solved, I have heat in the cab at an idle once more!!!
Hope this helps,
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