Originally Posted by KneeGrinder
I flushed my 2k F350 in 2004 5 times with distilled water, then added 4 gallons of Delo ELC. I have changed the coolant only 2 times since. The system holds 8 gallons of fluid. To get a near complete flush you must remove the coolant plugs on the very bottom of the motor, one each side near middle of motor. If you don't get near complete flushes, your ELC will be contaminated and it won't be ELC. Once you have flushed it though, you will never have to do it again, and you never have to check PH on ELC, that's one more benefit of ELC. Change it and don't look back!
Exactly! I did a very thorough flush on my 05 PSD back years ago when I changed the oil cooler. Got that ford Gold junk out and put the Rotella ELC in. I haven't touched it in years and tow all over Florida and the south and my temps stay perfect, my hoses are all OEM and the coolant stays a nice, bright pink all the time.
We have many guys on the 6.0 PSD forums talking about the ELC coolants ruining hoses and causing corrosion and other issues but I sure as heck haven't seen it.