Coolant flush with surprise - Page 2 - Ford Powerstroke Diesel Forum
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post #11 of 15 Old 12-24-2019, 06:21 AM
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Originally Posted by Cpgottabuh View Post
I decided to just flush it by opening the bottom valve on the driver side of the radiator then choosing and filling up with water and running to temp with the heater on to them repeat until clear. T
You are essentially only draining the radiator each time. The engine still has a LOT of coolant in it.


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post #12 of 15 Old 12-24-2019, 11:51 AM
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Contrary to the warning labels, you arenít going to suffer any negative consequences. Do the tongue test. Itís good for more than just finding voltage.

6.0 flush pdf
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post #13 of 15 Old 12-25-2019, 06:14 PM
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After determining if the "red" is truly transmission fluid or rust, after letting a sample sit, highly recommend reviewing NYLYONS write-up on various flush methods to meet your needs. Additionally, I followed ZMANN's suggestion of using liquid Cascade dishwasher detergent with Dawn, a couple years ago in my 6.0 nearing 195K (orig EGR cooler and OEM headstuds) and running the truck for a week, then dropping and flushing with about 24 gallons of distilled water (avg 3+ gallons each flush cycle). High idle mod speeds flush cycles vice driving, only needing about 10 mins each time. As stated earlier, drop the lower radiator hose and at least a block drain on driver side. NYLONS writeup also highlights reverse flushing the heater core, EGR cooler, and radiator - important steps prior to using cascade blend to push any sediments out that have collected in system. Maintained a 7-9 degree delta from initial flush converting to ELC-1 around 150K and as mentioned, for preventive maintenance and peace of mind.

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post #14 of 15 Old 12-26-2019, 09:51 AM
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It's a pain, but you should put in Fumoto valves on both the driver's side and passenger side to make this flushing process easier. The passenger side requires that you remove the starter. It's not hard but it is tight. I put in clear plastic hoses from the Fumoto valves to not get coolant/water all over me when flushing.
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post #15 of 15 Old 01-08-2020, 10:18 PM Thread Starter
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Thank you guys for all of your input. I'm ordering the funoto valves and will be installing then soon. I also purchased an coolant filter. And I believe I'll be buying an oem oil cooler as well due to the result after my finish.

So finally, I was starting to get clear water coming out with some (what appeared to be) rust or small particles of gunk. I kept flushing and then did about 5 flushes with distilled water. I ended up changing out the thermostat and I'm now getting about a 25-30 degree delta. From what I've read, outed definitely time for a new oil cooler. Anyone have any input with this?
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