how much antifreeze? 50/50? - JeepForum.com
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post #1 of 35 Old 10-11-2009, 11:27 PM Thread Starter
shok47
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how much antifreeze? 50/50?

when I did the timing chain on my 83 cj7 258, I drained the radiator and did not keep the stuff. I realized this stuff is more complicated than just filling it up. I bought some peak 50/50 antifreeze and coolant and put in about 16 cups of 50/50. should I keep doing that till it fills?? I should be checking the temps too but my gauge is not working.

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post #2 of 35 Old 10-12-2009, 07:17 PM
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Haynes says that it holds 10.5 quarts - at 50/50 that would be about a gallon and a half and then the rest de-ionized water.

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post #3 of 35 Old 10-12-2009, 07:22 PM
WayneMeuir
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I thought it was supposed to be mixed straight 50/50. If that is corect, why would you add anything except more of the 50/50 Premix?

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post #4 of 35 Old 10-12-2009, 07:26 PM
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why would you add anything except more of the 50/50 Premix?

I think 50/50 is more expensive per ounce than straigth coolant. and if your in a climate that never sees cold weather, a higher water content will be more effective. the ethylene glycol reduces corrosion, and prevents freezing so many people will run 70/30 or something.
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post #5 of 35 Old 10-12-2009, 08:03 PM Thread Starter
shok47
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Im in MA so I see some cold, nothing much below 0. I been putting 50/50 peak mix. I my heater is not working right now. should run it??
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post #6 of 35 Old 10-13-2009, 06:27 AM
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Quote:
Originally Posted by Killian View Post
Haynes says that it holds 10.5 quarts - at 50/50 that would be about a gallon and a half and then the rest de-ionized water.
No. I meant it to be that if you mix your own 50/50 blend, you would need to have a gallon and a half of antifreeze with as much de-ionized water (~12quarts).
If you buy 50/50 premixed, then obviously you need 3 gallons to make sure you have enough to fill the radiator (with some left over for the neighbors loud dog). I would recommend a 50/50 blend either way.

btw... I love dogs

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post #7 of 35 Old 07-04-2020, 06:18 AM
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Don’t use Deionized water even if the bottle on coolant or antifreeze says to do so. Always use distilled water.


Deionized water is water that is acidic from the H+ ions. The PH acidic and as a result attempts to correct this by pulling metal from the radiator (it will corrode the water blocks to get

its ions back) to correct the imbalance. While the significance of the PH isn't anything to be concerned with right away, over time this can have an effect on a radiator. Using deionized water a few times really isn't a big deal, but being left in for an extended period of time can have harmful effects.

Distilled water is distilled water. Neutral PH and no mater how many times it is steamed, it is still distilled water. This is why all race orgs say to use "distilled" water only vice deionized OR distilled water.
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post #8 of 35 Old 07-04-2020, 06:48 AM
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Originally Posted by ksheffer08 View Post
why would you add anything except more of the 50/50 Premix?

I think 50/50 is more expensive per ounce than straigth coolant. and if your in a climate that never sees cold weather, a higher water content will be more effective. the ethylene glycol reduces corrosion, and prevents freezing so many people will run 70/30 or something.
50/50 is slightly more expensive (won't break the bank) but eliminates all need to calculate when adding, and all need to find properly purified water. Modern antifreeze is also anti-boil so it's really advisable to stay around 50/50 even in warm climates

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post #9 of 35 Old 07-04-2020, 06:56 AM
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Originally Posted by Raleighwood007 View Post

Deionized water is water that is acidic from the H+ ions. The PH acidic and as a result attempts to co.
Yes this is correct. Requote for emphasis.

I worked in engineering for a valve manufacturer. Valves for DI water were typically nonmetallic. Even stainless steel was attacked.
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post #10 of 35 Old 07-04-2020, 01:21 PM
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I use the concentrate because it is cheaper. I buy the distilled water at Walmart or some other discount place for about 89 cents per gallon. I mix up 2 gallons of 50/50 and start with that. I then use a red Solo cup (that is marked antifreeze with a Sharpie) and add 1 cup of antifreeze and then one cup of distilled water until the system is topped off.

50/50 is generally what is recommended for most applications. Pure water cools better than water with antifreeze in it. The heat is able to transfer to the radiator better from pure water than a water antifreeze mix. If you live in a really hot climate, and never go to a cold climate, you can run less antifreeze in the mix. Antifreeze has some lubricating properties for the water pump and it also prevents corrosion in the cooling system.
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post #11 of 35 Old 07-04-2020, 08:17 PM
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I use premix to prevent corrosion and because it is easy to top up. We do not have cold here and the exact ratio is not important to me rather than stopping the Jeep from rusting from the inside out through the core plugs.

As antifreeze tends to leak out of Jeeps I do not buy the epensive ones, the OATs and hybrids, just old fashioned IAT is fine. They get checked every few weeks for colour changes and level.

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post #12 of 35 Old 07-04-2020, 10:51 PM
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What is the cause of the leak? The cooling system is one of the fluid systems that does not leak on my Jeep. The antifreeze stays in until I decide to drain it.

With the "Solo cup method" you can mix as much or as little as you need. If you only need a little, you use a 1/4 cup of antifreeze and a 1/4 cup distilled water.

FYT...distilled water is what your wife is suppose to use in the steam iron. We always have some around. When I flush my 7.3 diesel in my truck, I buy 15 gallons at a time.

Quote:
Originally Posted by BagusJeep View Post
I use premix to prevent corrosion and because it is easy to top up. We do not have cold here and the exact ratio is not important to me rather than stopping the Jeep from rusting from the inside out through the core plugs.

As antifreeze tends to leak out of Jeeps I do not buy the epensive ones, the OATs and hybrids, just old fashioned IAT is fine. They get checked every few weeks for colour changes and level.
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post #13 of 35 Old 07-05-2020, 07:29 AM
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Mixing your own AF is not only cheaper, but gives you the chance to change you mixture.


Easiest way is to dump half a gallon of AF into the radiator, then refill the other half with water and continue filling the cooling system (50/50). Once you empty the first jug, you can use it for mixing the next batch.


Don't mix heavier than 50/50 if you live in hot weather.
You can go 70/30 in extreme cold temps.

You can monitor your mix with a cheap tester.


Don't forget there are numerous additives that will increase heat transfer and reduce deposits and cavitation.

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post #14 of 35 Old 07-05-2020, 07:48 AM
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In this corner of God's green earth we don't use antifreeze. We use coolant!

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post #15 of 35 Old 07-05-2020, 07:57 AM
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Quote:
Originally Posted by shok47 View Post
when I did the timing chain on my 83 cj7 258, I drained the radiator and did not keep the stuff. I realized this stuff is more complicated than just filling it up. I bought some peak 50/50 antifreeze and coolant and put in about 16 cups of 50/50. should I keep doing that till it fills?? I should be checking the temps too but my gauge is not working.

You need to fill your system with the MIX. Do not add water. It already has water added for your convenience.


Something to think about in the future. When buying 50/50 mix, you are buying WATER. Hmmmm.

Buy regular antifreeze is the stuff you add water to to make sure you have the correct amount. Get the little guage/meter/tool to check the level of antifreeze you have in your rig and adjust it to your needs. use something like this, ABN Deluxe Antifreeze and Coolant Tester Hydrometer Tester Automotive Antifreeze Tester for Ethylene Glycol Coolant

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