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NEW! Technical Info: 4th Gen DRIVETRAIN Technical discussion of fourth generation (2007.5 and up) 6.7L engine and drivetrain questions, solutions and upgrades. For trucks with the 5.9L engine use the appropriate 3rd gen forums.
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  #21  
Old 3 Weeks Ago
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What about that water wetter stuff, supposed to cool yer system better?
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  #22  
Old 3 Weeks Ago
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I'm with BLRMKR27......new radiator cap
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  #23  
Old 3 Weeks Ago
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Definitely replace the radiator cap. The Cummins coolant fill procedure takes some time but it works good. Start with a cold engine, radiator cap off, run the engine until the thermostat opens and top off the coolant. Let it cool to ambient temp and top of the coolant again. Whenever I had our trucks in the shop I would take that plug out of the air bleed and install a petcock to make it easier to bleed the air out. If your truck has an EGR cooler on it you should be bleeding it at that plug.
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  #24  
Old 3 Weeks Ago
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Replaced radiator cap cause the gasket on the bottom was a little distorted.
Seems to have solved the collapsing hose issue and sucked another quart out of the overflow jug.

No EGR cooler, but I tried removing that bleeder plug the other morning and it's quite stubborn!!
That Cummins fill procedure sounds about like the standard for anything, start cold, fill and run till warm, recheck and top off, let cool and recheck.

I did push it pretty good the other day, made er stay 60-65 while hauling a 12x24 bout 50 miles and never passed 210 so maybe I did gain a little.
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