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6.0L Power Stroke Diesel 2003 - 2007 F250, F350 pickup and F350+ Cab Chassis, 2003 - 2005 Excursion and 2003 - 2009 van

Are my temps high?

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Old May 25, 2016 | 03:42 PM
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Are my temps high?

I recently replaced my thermostat with one from Ford and my coolant temp gets up to 208 and oil temp gets up to 211. Are these temps normal for being unloaded?
 
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Old May 25, 2016 | 04:00 PM
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What is your ambient temp outside? Are you driving on flat roads? Is your oil system stock? Seems high if your just cruising on flat roads and it's not blazing outside.
 
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Old May 25, 2016 | 05:26 PM
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85 plus degrees outside running 60 mph up and down some small hills
 
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Old May 25, 2016 | 05:33 PM
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My OEM t-stat ran 204 consistently for 10 years. That's a very good area to run for efficiency.
 
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Old May 25, 2016 | 06:15 PM
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Starting to think the Napa thermostat I installed years back wasn't allowing temps to warn up to efficient temps
 
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Old May 25, 2016 | 06:18 PM
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Needs to be more than 185 to allow closed loop fueling. 200 is good for fuel efficiency, closer to 210 perfect.
 
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Old May 25, 2016 | 06:58 PM
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I run 190-192 empty with ac on, 196-200 pulling the 5th wheel ac on. Been that way for 4 yrs and 2 oem stats.
 
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Old May 25, 2016 | 07:10 PM
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I run 190 - 192 also with a Ford t-stat. I plan on trying the Mishimoto 200 stat one of these days. Probably when I install a coolant filter as I have to drain the coolant a bit anyway.
 
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Old May 25, 2016 | 07:26 PM
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Originally Posted by cory5517
I recently replaced my thermostat with one from Ford and my coolant temp gets up to 208 and oil temp gets up to 211. Are these temps normal for being unloaded?
Those temps seem pretty high for a stock stat with no load and average ambient temps. Should be in the low to mid 190's for ECT
 
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Old May 25, 2016 | 07:39 PM
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at any given time, Scangauge II claims 6-7 degrees cooler than analog Autometer.
 
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Old May 25, 2016 | 10:20 PM
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When was the last time the radiator, intercooler have been cleaned, dirt and dust and dead bugs are going to reduce cooling capacity significantly, sounds like you are running slightly high but only marginal. If you are cleaning it, it has to be back flushed with low pressure water so the fins are not bent, and you need to be careful not to pry or poke any holes in the rad. It might be worthwhile to test a different thermostat. After that, I would be thinking water pump. What are your oil and water temps after an overnight cold soak,do they match?
 
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