4th Gen Engine and Drivetrain-2010 and Up 6.7 liter Engine and Drivetrain discussion only. PLEASE, NO HIGH PERFORMANCE DISCUSSION!

Thermostat ? If heat and friction are the major problems with IC engine...

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Old 11-21-2012, 10:40 PM
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Thermostat ? If heat and friction are the major problems with IC engine...

If heat and friction are the major problems with an internal combustion engine why are the theromstats at 195 degrees.
Would putting in a 185 or even a 160 degree thermostat give a longer life to your engine
I own a 2010 6.7 cummins
Old 11-26-2012, 05:25 PM
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Well you have to maintain a certain temp while operating. If you run too cool then fuel burn efficiency will be lost. Now exactly how cool is too cool, Im not sure.

I did go from a 200 to a 190 when I did the work on my truck.
Old 02-19-2014, 10:20 PM
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When you changed to the 190 did you temps drop a bit. My 2010 runs at 204 to 210 after the deletes. Thinking I may want to lower the temps a bit before I start race season and start towing. Your thoughts Blake?
Old 02-20-2014, 04:57 PM
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mine is 185 going down the road. I have noticed that since I did the manual trans swap the engine temps are cooler by not having the tranny cooler up front pre heating the radiator. 10-12 degrees cooler. also killing the post injection event cooled her down a lot also. stock tstat on mine still also
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