Originally Posted by oakley_xc
Its coming from the cap....I just got back from a 1500 mile trip towing the whole time & maybe only leaked down a 1/2''. I figured if it had a blown rad that it would leak out a little faster then that????? or am I just denying the obvious???
It may NOT be the radiator. There are quite a few people starting to comment on coolant overflow at the degas bottle, (referred to as "puking coolant"). Seems to be more common on tuned trucks than stock ones, but the same issue remains for both. More info in this thread:
Also, on The Diesel Garage. They have a couple of huge threads about it. Some guys that have sent their trucks to Elite for other work/mods are waiting to hear back on the source of the degas bottle overflow. Some say head gaskets (drawing from the 6.0 problems), and others, a flaw in the EGR system/coolers that is allowing exhaust gas to escape into the system, overpressurizing it. The deaeration line for the cooling system sits between the egr coolers and the degas bottle, so any exhaust leak into the coolant will head directly for the bottle in a hurry.