This is long winded but necessary..
A little water is one thing, coolant is another whole ball game. One might get away with flushing it if it was just water, but, I have never had any luck or seen anybody have any luck with coolant contamination.
A lot of people just bypass the heat exchanger and add a Derale cooler under the bed with a fan. It is definitely not as efficient as the heat exchanger and you loose the ability to warm the fluid when in cold temps but it is an option depending on your location and use.
These coolers have been pretty solid as they have been used since Dodge started using the Cummins in these trucks. Occasional failures happen and it is no consolation when one is the target of chance.
Referring to OEM replacement parts did not include the exchanger, I was referring to replacing the radiator and trans cooler with new ones. I'm not wasting time
trying to clean either one. As for the a remote exchanger, I've already received the new OEM one.
As for the "lines", I was referring to custom SS braided ones the could be routed in such a way as to not contact any other hoses and such. Trying to put this thing back together again avoiding the crappy OEM designed to fail.
Getting back to the engine flushing which I think needs to be done ASAP unless the internals of the engine are not at risk like the trans. My thought is to start removing parts: lines, trans cooler, radiator & exchanger and flushing the engine directly with warm or hot soapy solution
somehow . Or, leaving all intact and somehow get the cleaning solution into the system whether by: 1- filling the radiator directly, 2- through the overflow recovery tank or 3- through the T-stat port ?
Should I run the engine for a while in a closed system up to temp OR do the flushing in a purge with a hose disconnected and adding water as it flushes ?
Using diesel fuel as the solvent better ? Safer ? or does it really matter ? As it is right now, I have 10+ gallons of nasty milky trans & water fluid to dispose of. Using the diesel mixture I may well be able to throw it on my brush piles to burn or take it to the oil recyclers at my local refuse station.
What about the water pump and possible damage to it ? I suppose at this point I might be better off with a new and better one
if there is such or rebuild it ?
I always leave my block heater on if under 50 deg. so also wondering if the element is now encrusted from heating goo vs coolant ?
If I'm taking the trans cooler and radiator off that would give me direct access to swapping a better harmonic balancer as well.
BTW, I do have the entire 105 Mb shop manual on my computer.
Thanks again for taking the time to read this guys and provide recommendations based on real life experience, I really do appreciate everyone's input.
Rob
BTW, it was discovered that my failure started over 90 miles from home where I had left a nice deposit of pink **** in several locations I was at. So, I had driven all the way home for over an hour on the freeway without any indications of overheating or driveability problems. .