Coolant problem on 6.0

[fx4f150]

I have a 06 that when I'm running it down the road my gage on my cts shows its getting hot and the stock gage is nom and I have coolant coming out around the cap we have done a pressure test and it holds and I've put a new cap on and it still dose it any ideas what's going on


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[BeXtreme04]

What do you mean by hot? Stock gauges are garbage.. Min line on the degas bottle is the max fill line, if it is over that it will overflow out of the cap


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[fx4f150]

Like on the cts it will run from 190 to 210 and then go back down and if I run it hard it will jump up to 220 and then go down it never stays hot and if I sit at idol it will go down to 188 to 190


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[cptn25]

Sounds like your coolant system is building pressure....egr cooler or headgaskets maybe? I'd do those tests next, check out bulletproof diesel.com they have some pretty good videos on how to do it. Powerstrokehelp.com also has a lot of good info as well. Whats your oil temp read? need to check the delta between eot and ect, that will give you a good idea if your oil cooler is clogged up.

[JPSBOOSTED]

Is the Egr unplugged? Your SCT tune might have something to do with it. It's a common issue

[BeXtreme04]

Might have a bad thermostat too... 188-190 is normal temp... Do you have a motorcraft thermostat or did you replace it with an aftermarket one? Motorcraft fails open aftermarket doesn't. Also you might have a slipping water pump... I think i've seen some threads on that but I can't remember off the top of my head


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[2006PSDSD]

What is your EOT/ECT delta? The stock gauge is just an idiot light, telling you that you smoked the motor, more or less, LOL

[Term3]

Yes once you get a set of real gauges you will see how utterly useless ALL the so called "gauges" in the dash are.