I'm stumped....any thoughts?

[snailexpress]

(01-19-2018 )Beaver Wrote:  Yes still mandated. So 40°difference between oil and coolant temp is normal? Dang crazy. I wonder why my jakes and manifold pressure goes to crap as it heats up. Also, I don't think ita the turbo helping warm up the motor, it happens when I stop too.

You didn't mention how many miles on the engine. Oil pressure. Oil change intervals, was DPF cleaned or never. SCR system inspected. DEF filter replaced. NOx sensors replaced or checked at least. I'll bet it packed with soot every oil passage. Some of passages on my engine rockers were plugged completely.
ECM is in control of emission and if it need to run hotter to lower emission it will do it. In idle too.