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Old 11-25-2011, 08:47 PM
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Coolant Flush Question

Got a quick coolant flush question for ya:
After installing a Bulletproof EGR delete and new oil cooler, I flushed the coolant system with Fleetguard Restore and VC-9. Since then, I've flushed it 6 times with distilled water (approx 4 gals per flush, up to the full mark on the sticker) but when I drain it, the water is coming out foamy and slightly yellow. I remove both engine drain plugs each time I drain it , so I'm removing as much water as possible each flush. Once I'm done, I'm going to install a DieselSite coolant filter. Do you think I've flushed it enough, even though the water is coming out foamy and a little yellow, or should I keep flushing it? Will that coolant filter get rid of whatever's causing it to foam up? I haven't heard of anyone having to flush it this many times, but I could be wrong. Thanks for the help!
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Old 11-25-2011, 09:17 PM
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Well your first mistake was you did it after the new oil cooler. You probably just cloged it up again. You can test the PH to see if its at the correct balance. there are 1,0000 threads on this already.
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Old 11-25-2011, 09:29 PM
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Yeah, I figured that out after the fact, unfortunately. Hopefully the coolant filter will help with that...we'll see. Any ideas on the foam? It's heaviest when coming out of the radiator. When I drain the engine block from the two drain plugs, it's not that bad.
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Old 11-25-2011, 09:32 PM
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I would test the PH. The test strips you can get from a pool store.
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Old 11-25-2011, 10:30 PM
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Quote:
Originally Posted by m015004 View Post
Yeah, I figured that out after the fact, unfortunately. Hopefully the coolant filter will help with that...we'll see. Any ideas on the foam? It's heaviest when coming out of the radiator. When I drain the engine block from the two drain plugs, it's not that bad.
The distilled water should be about as clean coming out as going in, i used 48 gallons of distilled water and a 1/4 tank of fuel when i did mine and 12.5hrs of my time here is the flush i did.

Flushing and cleaning the 6.0

Restore is for cleaning out any silicate goo. VC-9 is for cleaning out iron and scale. Restore Plus is the same as VC-9 and cheaper.

To flush drain the coolant by removing the lower radiator hose from the radiator, and removing the drain plug from the driver side of the block. There is a drain plug on the passenger side also but you have to remove the starter to get to it. I don't bother with that one.
I also highly recommend you pull the thermostat out on your first drain and put the housing back without the thermostat. It only takes about 10 minutes and will save you 2.5 hrs or so in doing this whole procedure.

Ok now put the lower hose back on and the drain plug back in the block if you removed it. This is the procedure you will use each time to drain the system, except you will not touch the thermostat again until you're finished the whole procedure. Make sure that you set your heater to high while doing this to flush out the heater core as well.

Fill the cooling system with distilled water, start the truck and let the water circulate for 5 minutes. (if you did not remove the thermostat you must run the truck until the thermostat opens + 5 minutes to circulate. This takes 15 to 20 minutes each cycle and is why you should just remove the thermostat) Stop the engine. Drain the system and repeat the flush.

Now add at least 1/2 gallon of Restore and fill with distilled water. I used cardboard in front of the radiator because you have to get to 185* 190* for these products to work. Drive truck or run on high idle for 60-90 minutes just before you get back from your drive remove the cardboard this will help in the cool down same on the Restore+ flush. Drain and flush 3 or 4 times. or tell clean

Add 2qts VC-9 or 1/2gal of Restore Plus, top with distilled water, and drive the truck or run on high idle for 60-90 minutes. Now drain and flush until flush water comes out clear and clean. When you get clean flush water, flush 3 more times using distilled water while draining the block.

After your final distilled water drain it is time to put the thermostat back in. I recommend you install a new thermostat at this point. They are only $20 or so and it is good maintenance procedure to do so. Fill with 3.5 or 4 gals of ELC concentrated coolant and top off with distilled water. Drive the truck or let run for a while topping off with distilled water. Check the truck over the next few days and top up as required while any air left in the system works its way out.

Keep some 50/50 ELC on hand to use to top off the cooling system from here out and you are good to go.

new t/stat from Ford it should all come together (housing-t/stat-o-ring) in a box. The part number is RT-1169

Here is the Restore Product from Cummins dealer
http://www.fleetguard.com/pdfs/produ...LI33024-GB.pdf
2 stroker
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Old 11-25-2011, 10:34 PM
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The pH ended up being about 7.5. Nylon's Cooling System Flush guide said that a pH of 7.0 means that the Restore and VC-9 is out. With it being a 7.5, am I good, or should I continue flushing? Thanks again for the help.
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Old 11-25-2011, 10:59 PM
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I would do one more then check
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Old 11-26-2011, 12:03 AM
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Keep flushing until the yellow color is gone and the foam is gone. The different color is telling you junk is still in there. Clear = clean
I used about double the amount you have in it so far. Also be aware of the fact that when you stop flushing , and "call it a night" you go right back to square 1 because rust scale begins to form very quickly and will turn the water a rusty color by the morning.
Flush until it is done.
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Old 11-26-2011, 06:30 AM
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PH has to be @ 7. I think I had to flush about 15 time before mine was all clear. Used 1/2 a 40gal tank. Also I only used 3 gallons of Cat coolant.
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Old 11-26-2011, 07:46 PM
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So I flushed it about a dozen times today alone, putting more than 50 gallons of distilled water through the truck. The water is coming out clear now, but it still has a layer of foam on the top as it drains. After about 5 mins, the water goes away leaving clear water and a slight amount of sediment. Any idea what might still be causing the foam? The pH is right around 7.0. I've emptied 2 grocery stores of their distilled water today and half of a super walmart's supply. I'm starting to run out of water! Thanks again for your help!
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coolant filter, coolant flush, fleetguard restore, vc-9

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