Here's a challenge......
06' 6.0L.....just did EGR delete. The first issue I come across is the fan clutch issue related to not pluging the EGR back in after its blocked off....read all about it on every forum on this site....so i plugged it back in and mounted it to the CAT tube, out of the way...the fan is still spinning at a higher rate. So I figure i better take it to my friend/ford diesel mechanic. He reflashes it. He does the in line test for head gaskets(never made more than 10) So he says thats fine. He also tests the variance between the oil and water temp. That was within spec. Then we figure that the coolant level ratio was off, beacuse i had to run straight water through it just to get it to my shop(loosing water due to the failing EGR cooler)...so we get that to 50/50. He drives is and it works for him, BUT as soon as i put my foot on the pedal the fan starts up again....So we figure that it has to be the fan clutch, the PCM or the harness. I agree. then i see my thermostat start to creep. He also said it ran a little hot for him as well(he had his pc hooked to it while he test drove it)...So i immediately think, thermostat! Nope...changed that with OEM parts. So here i am.....what is my issue. My dad immediately grabbed the lower radiator hose and said "cold as ice"! Your radiator is blocked!....could that be? You would think that if it were blocked it would run hot and over heat, right? Then i think the only other thing it could be is my water pump? Also while you pros are helping me figure this out, i turned on my heat to help cool the truck down while it was running hot, and nothing but cold air(even at 90 deg).....a little help before i go dump some more $$$ into this da_n truck. Thanks