Increasing flow doesn't always decrease heat. If the coolant passes through too fast, it physically will not have enough time to dissipate heat from the coolant to the surrounding materials. It's the same concept as taking the thermostat out of the cooling system. A lot of times the thermostat not only serves the function of quicker warm-ups, but once it's open, the housing still limits flow, in order to allow the coolant to dissipate heat properly. If it runs through the radiator (or in this case the EGR cooler) too fast, it will just hold the heat.

As a note on the heads, new heads from Ford come in out of spec, so that doesn't mean they're right. They still need to be decked. Studs would have been nice to put in.

A lot of times if you have what looks like oil out of the downpipe, especially since you're having coolant issues, it is coolant mixing with soot and it looks/feels similar to oil.

 

This is my work truck and I couldn't wait to get the studs shipped in so i didn't go that root.

It ended up being the EGR cooler went bad. what I thought was oil was the fluid mixed with the carbon so it looked like oil but wasn't.

Thank you all who helped. You saved me alot of headache and time that I don't really have right now.

 

Glad to hear you got back on the road. Just so you know you can do the head studs once the cab is back down and the engine is back together. I have had to do a few of these weird jobs were a shop was not available and tools were limited.

You can jack the engine up a bit and undo the motor mounts once the motor mounts are loose you can then lower the engine down just enough to get the clearance needed to do the head studs.

 

yea, I was told you have to remove the cab to change the heads but we didn't. I guess I got lucky. We just removed the ac/heat box.