LLY: Worried.. Coolant Question

[ShredLordXx]

Yeah I was going to get the big jugs of distilled water from the grocery store 3 gallon ones, and empty the junk thats in there now, fill it up drive around, empty, fill it up and empty, and then add the concentrate mix, but yes you can buy both premix and concentrate, the system doesnt look muddy yet, and they probably added universal coolant to it, so it probably wont mud, but I'm not going to take any chances.

 

[ShredLordXx]

I've seen some post that people use De-ionized water, if that's the case i could make my own, i have a massive RO/DI unit 300 gal per day. I would think de-ionized would be terrible in a aluminum system

 

[07keo02]

I personally think dexcool is fine in a properly maintained system but it leaves little room for user error or neglect. I'm running with no thermostats (just the seals in place) and driving around with cascade in the system, but I had a major mixture and possibly an oil mixing problem.


http://www.duramaxdiesels.com/forum/showthread.php?t=63693

 

[Huffy67]

Don't buy anything 50/50 whatever you do. If you flush with water or distilled water and don't drain the block, just fill with straight antifreeze. If you do drain the block completely you should still use straight antifreeze, just mix it with water or distilled water about 60% antifreeze 40% water. That 50/50 crap they sell you is a complete rip off!!!!!


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[ShredLordXx]

So with the water in the block still, I should just pour the pure Dex-cool concentrate right in and call it a day?

 

[ShredLordXx]

I'm just trying to figure out how much the remaining block water will dilute the solution, and how to mix it going in, I really don't want it to freeze when it hits -45 for a a couple of months straight.

 

[07keo02]

I get this much every time I drain from the drain plug, not removing the block plugs. Once I get the system clean I will probably put straight coolant in until I'm full. The total capacity is right at six gallons so I'm hoping to get most of the 3 gallons of straight coolant I have to fit in.

 

[ShredLordXx]

I see, so don't even bother mixing, just dump in pure concentrate dex, and the water remaining in the block will be enough for the mix?

 

[OregonDMAX]

Go buy a cheap antifreeze hydrometer it will tell you everything. But if it were me I would do half Dex and half water to start, the block doesn't hold much compared to the radiator.

 

[DAVe3283]

When I drain mine, I get closer to 5 gallons out by pulling the lower radiator hose after the radiator drain stops working.

If you want to flush it with distilled water to get residue out, you will need more than 3 gallons. I'd pick up ~10 gallons, so you have a few flushes worth of water. It is less than $1/gallon where I live.

I have run nothing but DexCool in my Duramax, and several other GM motors, for their whole lives. Never had any problems. If you are worried about the water left in the block, after the last flush with distilled water, fill the motor with 60% DexCool instead of 50%.

 

[Huffy67]

X2 what Dave said. He is better with words than I. Lol


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[ShredLordXx]

hahah, I just went out tonight and bought 4 bottles of Prestone Dex-Cool, I'll probably go pickup some of those big 3 gallon jugs to do a few flushes tomorrow! I will flush it on the weekend though.

 

[ShredLordXx]

Well Thank god I flushed it, first bit came out orange, 2nd flush was opaque, then third flush was pure green, i kept flushing till clear, and then ran the hose on it for a long time, I blew all the water out of the block with the bleed screw open, just kept pouring in new dex until it ran pure orange out of the bleed screw! My temps are even better now, amazing Thanks for the help guys.

 

[Huffy67]

Nice!!


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[Awenta]

Good thing it's done now and not later when it's too late!

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