Anti-freeze life span? - JeepForum.com

 
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post #1 of 7 Old 01-02-2016, 10:22 AM Thread Starter
300cpilot
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Anti-freeze life span?

I had lots of fun this last summer and had to replace the anti-freeze twice. When I put it in there it was good to well over -40. However today I go out and start up the jeep, its currently 0 outside. Anyway when I got out I saw antifreeze everywhere...

Now the antifreeze tests to +10. WTF

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post #2 of 7 Old 01-02-2016, 11:38 AM
PimaXJ
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Depends on what you filled it with. Mopar makes a 3 year & a 5 year coolant, the longer interval is the Dex-Cool which is red in colour. Always replace like with like unless you do a compleat coolant system refurbishment. Also distilled H2O is recommended. Sounds to me that you have a possible leak if there is coolant on the ground. Do get that cleaned up so animals do not try to lick it- poisonous!
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post #3 of 7 Old 01-02-2016, 03:14 PM Thread Starter
300cpilot
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Yes there was a leak, the dam thing froze. Luckily it only split the bottom radiator hose. I replaced it with pure antifreeze, no water. I have run it for a couple of hours and seams fine now.
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post #4 of 7 Old 01-02-2016, 04:30 PM
bryanintowson
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Not sure that pure antifreeze is the way to go. There should be at least some water unless you're using waterless coolant.

1992 Cherokee Laredo - Current
2002 Wrangler Sport - SOLD
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post #5 of 7 Old 01-02-2016, 06:50 PM
Carves
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100% eth-gly has a freeze point of about 10*f.

A 70/30 ratio is about the max thats useful for cold weather,

... but not so useful in hot weather.

Thats why the typical ratio specced by carmakers is 50/50 ... Not the best ratio for all weather scenarios - but suitable for the majority of vehicle users.
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post #6 of 7 Old 01-02-2016, 07:43 PM
ECL
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Ditto the above. Check the temperature chart in the back of the antifreeze container. This is a case where too much is not better.
And it doesn't go bad for years...maybe never...
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post #7 of 7 Old 01-03-2016, 12:16 AM Thread Starter
300cpilot
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Sorry I should have clarified, that I did not drain the system completely. I put in about 7 quarts of what was sold as pure anti-freeze. There was still at least 3 quarts of coolant/water mix still in the system. The stuff I bought lists water on the label, but I have been unable to determine how much water is in it. The label on the jug goes to 75% / 25% which should yield -69 degrees. It tested to -22 tonight. Figure that one out?

Running pure anti-freeze in cold climates is more common than a lot of people think. When I lived in Montana it was the first hard lesson that place taught me. You cant buy antifreeze, as far as I could find, without some water already in it. So figuring out your ratio's is next to impossible.

Also some of the newer anti-freezes use Propylene Glycol and the pure stuff freezes at -74 and is way less toxic.
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