Originally Posted by
JKTex
....If it smells like exhaust, there's really only 1 way exhaust gets into the cooling system. Head gaskets.
Close....there are actually 2 ways on a 6.0, the other is the EGR cooler.
You can actually go to harbor freight and build yourself a gauge to test the pressure and easily determine what the problem is.
You'll need a T-fitting for 3/8 hose and of course a guage to monitor pressure.
Perform this test when the truck is fully warmed up btw...
-If the pressure rises quickly under hard acceleration, it's the EGR cooler leaking.
-If the pressure rises slowly under hard acceleration, you have blown Head Gaskets.