Smoke test failure D13, smoke from the oil fill tube.

EGR motor?
Could be doubling back through the EGR. Or really bad piston rings.

 

Isn't this normal if the motor is running hard? I mean the little tube out along the radiator? The expansion tank saves coolant when hot, and goes back in when cools down and vacuum is created in cooling system.
I did compression test on my last truck @ aprox 1 mil miles, and came out worst than yours, I've been told to start saving for inframe. I drove and sold the truck at 1.8 mil, the buyer is still running over 2 mil. mil without inframe.
I don't know how accurate are this computer generated tests , i understand are done by shutting down each injector ? There 's no pressure sensor in each cylinder , it's just a calculation of other sensors data.
I studied transportation engineering 25-30 years ago back in Romania, we were a bit primitive less computers . I remember the compression test was done removing injectors one by.one for diesel or spark plug for gasoline motors , insert an air fitting with gauge and read one by one every cilinder. I would still trust that method more than a computer program , perhaps was designed to sell trucks ,make more $$$ on parts and services.

 

If the compression test is accurate , shows a drop in compression capabilities from cilinder 4 to 5 and worst 6, could be head gasket if cilinder close to each other are affected.