I had an idea the other day when replacing the EGR cooler hose on my 6.0, why not put in two elbows and route the coolant in parallel to the EGR cooler.

External coolant filters tap the supply from water pump and return to degas. Why not also tap this supply and send coolant to the EGR. Take the Oil cooler exit and return it to the degas bottle instead.

I've been searching and searching and can't find why this wouldn't work.

Seems someone else has also had the idea but no one ever answered him:
Rerouting coolant flow to route oil and egr coolers separately - Ford Powerstroke Diesel Forum

I could only think of two problems, 1st being that the hose is very short. Would be tough to get two elbows in that space. 2nd, maybe the coolant to the EGR cooler needs warmed up first or it could overcool the exhaust gasses?

 

I have wondered this same thing. try it, what's the worst that could happen?

 

What would be the benefit of doing this?

 

Reinventing the wheel again are we? Not that Fords wheel does not a good bit of work.
I think it would need a lot more than 1 little bypass.

 

The benefit is when your oil cooler ages and the flow gets reduced it won't affect the egr cooler and blow your head gasket... Sort of a poor man's bullet proofing.

It's an 07 van I'm working in so egr delete will cost double because need a tinner or codes get thrown. Plus it's a van and if you've ever worked on a can you know you'll never want to touch it again

 

The coolant flow comes out of the block and thru the oil cooler but not all of the coolant flow. A blocked oil cooler the rest of the system will still get it's coolant.
I have replaced many a oilcooler and egr cooler that the engine never had any major over heat issues simply because the delta indicated cooler blockage or failure of the egr cooler.

Head gaskets are more often damaged by excessive boost than by overheat issues.