Green coolant or red coolant?

Discussion in 'Heavy Duty Diesel Truck Mechanics Forum' started by Vio, Dec 3, 2017.

  1. lilillill

    lilillill Sarcasm... it's not just for breakfast

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    I run Cat EC1 spec (spec... not brand) coolant in everything I own that requires coolant. Not a lick of trouble out of anything.

    I was at O’Reilly’s the other day, picking up a set of batteries for my truck. An older woman was getting a water pump and some other crap for a farm truck. She asked the guy behind counter if he thought it was cold enough to start using antifreeze. (I live in the south)... I wanted to beat my head on the floor.

    Southern vehicles look nice because there’s no salt to eat them up but I can’t count the number of used vehicles I’ve looked at that have goopy, rusty water under the cap. Blown head gaskets are epidemic down here because of the widespread misconception that you only need coolant in the winter.
     
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  3. Volvo8873

    Volvo8873 Light Load Member

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    Well I guess I have never ran into the problem of having goop like that in your coolant from mixing. Do not know what to say. I’m sure one of the “experts” on here will chime in! LOL
     
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  4. aussiejosh

    aussiejosh Road Train Member

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    What ever is your favorite colour
     
  5. GrapeApe

    GrapeApe Road Train Member

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    There are 2 basic bases (there are others, but 99.9% are one of the two), ethylene glycol and propylene glycol. Propylene glycol is less toxic, ethylene glycol is a little better for freezing and boiling, but that advantage is pretty insignificant. The main reason for the change was how toxic ethylene glycol is, there is no valid argument over which one works better, they both work. Dyes are just dyes, there's many colors, there is no valid argument over which color is better. The main difference is in the additive packages, some mix and some don't get along so well. Color is not a clear way to tell what is really compatible with another, you an have many colors totally compatible with each other and you can have 2 of the same color that are not. The only really safe way is to look at the spec and don't mix different specs.

    Years ago, red was red and green was green. Now we have red, green, purple, blue, orange and I even seen yellow recently. Every brand wants to make there own trademark color, but there is no standard as to what spec the colors are.
     
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  6. Oxbow

    Oxbow Road Train Member

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    Question for you. Is the universal "safe for all engines" coolant indeed safe to use as add coolant?
     
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  7. NightWind

    NightWind Road Train Member

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  8. GrapeApe

    GrapeApe Road Train Member

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    I cannot guarantee that, I don't know of any that could be 100% safe for every brand/type of coolant. They are probably OK for most in small amounts, but I wouldn't risk it based on those claims. In a pinch, I'd use water, then adjust with straight anti-freeze of the correct spec as soon as I could.
     
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  9. Oxbow

    Oxbow Road Train Member

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    Thanks.
     
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  10. OneTwentyOne

    OneTwentyOne Light Load Member

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    Good day. I did a search on the forum becuase in a pinch I had to use two gallons of Fleet Charge SCA Precharged antifreeze (pink—ish in color).

    I normally use Final Charge Global 50/50 Prediluted antifreeze (red).

    They are both made by Peak.

    My question is to the forum - should I flush or does it matter that I combined both and only two gallons?

    My concern is I didn’t read the instructions and dillute like instructions state!!!!

    Thanks.
     
  11. KB3MMX

    KB3MMX Road Train Member

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    That's from people that refuse to service their coolant at all. OACs are far superior to Green old school coolant, also in the performance dept too .... Expect 10-15% better hear transfer with OAC than green.

    Emissions systems put more heat loading on cooling systems is the big reason why all the MFGs changed away from green.

    There are other benefits too
     
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