Join Date: Oct 2012
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I started this process because I had a leaking radiator hose. I replaced all three radiator hoses. I then flushed the gold coolant out with tap water. Once it was out (about 20 gallons of water flushed through), I added 3/4 gallon Restore and tap water. I drove it for two solid hours and then returned to the shop to drain - tap water fill - repeat. I did this for a couple of hours. I never got any muck out. It was a little yellow in color. I am positive my ECT and EOT were at NOT (normal operating temperature) - 194F or so for the duration of the drive.
I only drained using the lower radiator hose and pet****. I was unable to get the block drain out and didn't want to press my luck with it.
Then, I put in 3/4 gallon Restore+ and tap water. Same as above - over 2 hours driving, normal temperatures the whole time, drain-fill-repeat. I flushed over 100 gallons of tap water through the truck trying to get the Restore+ rinsed out. I am still getting the bubbles. The pH, measured using swimming pool pH strips is around 7. I am most probably over thinking this to death. Needless to say, I used up my 20 gallons of DI water and went back to tap water because it didn't seem rinsed enough.
It is in the shop (50F) full of tap water right now. I have my Sinister coolant filter kit on the bench ready to install.
Every time I fill I am only able to add 4.5-5 gallons. Is that ok? Between the drain-fill cycles I have been driving the truck to get temperatures up to 180+ and then repeating.
Is there a way to totally drain the system? Am I missing something? If so, I could go buy more DI water, drain it completely, fill with DI, drain completely again and then final fill. I looked at the thermostat housing. I have to say I do not see how to get it off without removing the upper EGR heat exchanger.
It is worth noting nothing came out of my engine in the flushes. I mean nothing. It had the old design (one o-ring) radiator hoses. Updated hoses on now.
Anyway, I would greatly appreciate any input. It sits in the shop until I figure out what to do next. I have another rig to get me to and from work in the mean time.