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Old 02-01-2014, 06:40 PM
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Antifreeze test

My 2013 Wrangler was manufactured right at the beginning of the model year production. My antifreeze overflow jar is very low so I want to add more. I've got a jug of the 10y/150k coolant from the dealer - but given the consequence of mixing HOAT with OAT I would like to confirm that I don't have left over 2012 antifreeze.

Does anyone know a non-color-based test to determine what is in my cooling system now? Alternative - does anyone know if 18mo old used HOAT mixed in an external glass with equal volume of new OAT will unambiguously gel without exposure to engine heat?

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Old 02-01-2014, 07:48 PM   #2
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The normal range for the coolant level is 2-3" above the "Min" line cold. If that's where yours is you don't have to add. You wouldn't have "left over" anti-freeze from the previous model year.

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Old 02-03-2014, 05:14 AM   #3
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You'd be surprised kik, there have been a few posting to the other thread about the color difference in there 2013.

I'd say pull some out with a turkey baster and look at it in a clean glass. Heck, post a photo here too. Mine is purple looking through the res from the side with a light but it looks like orange juice looking into the res from the top.
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Old 02-03-2014, 09:58 AM   #4
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A Cheap Simple Alternative

Unless your coolant recovery bottle is completely empty, just top off with distilled water. The coolant system holds 14 qtrs, so a few ounces of added distilled water won't make much of a difference in the total coolant % balance. My experience is the coolant recovery tank goes down almost 2 inches from summer to winter temps. You can either top off the coolant tank (half way between max/min when cold), or when the engine is cold, open the radiator cap and transfer coolant to the recovery tank and then top off the radiator. Ultimately, it all gets mixed after several engine heat/cool cycles.
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Old 02-03-2014, 01:28 PM
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My bottle is completely empty except for some kind of sediment at the bottom (I intend to get all of that out and check texture to see if it's slimey/gel [particulate/contimaintion?] or gritty [casting sand])
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Old 02-03-2014, 02:29 PM   #6
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If your overflow tank is completely empty, I would check the radiator to see if it is full. I too have a 2013 and when I first got it the fluid was very clearly a purple color. Now (a year later), it is starting to look more red/orange in color. Very odd. The only think that has been added to mine is about 1/2 the coolant recovery tank was topped off with distilled water.
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Old 02-03-2014, 03:51 PM
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Not full to the top, but doesn't seem very low - this IS why I want to get more fluid into the system, and why I don't want to just assume anything. Given that fluid can change color and given that the light you examine by and a judgement call are involved when comparing colors - this is why I wanted to know if anyone knows of a non-color based definite test.

I'll pick up a turkey baster - my wife wouldn't like me using our kitchen one to slurp up 'low toxicity' fluids.
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Old 02-03-2014, 03:54 PM   #8
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Have you considered using your warranty? I would have the dealer flush it, including the expansion tank, and go from there if it's under warranty. Being empty like that in a short period of time you might just have a minor leak, or, something else is going on that's more involved.
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Old 02-03-2014, 05:42 PM
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As seen in radiator, pulled from radiator, and a bit fresh from the jug. Very clear difference in color. What's in the radiator I would call red or red/pink, definitely not purple.
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Old 03-19-2014, 08:23 PM   #10
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i'll bet you have OAT. I believe the purple changes to a pinkish over time.
https://www.wranglerforum.com/f19/hyp...me-586274.html
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Old 03-19-2014, 09:07 PM   #11
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I sure hope it does because I have no idea what color mine was when I bought but now its like a magenta pink. Looks like the "after" pic here and my end of model year production 2013 10th Anniversary has 10K miles on it now.

This is the pic from the other thread, hope the photo owner doesn't mind repost for educational purposes here.
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Old 03-19-2014, 10:39 PM   #12
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photo owner is on challenger forum. It's a helpful pic. Mine looks like the pink; but I am pretty sure it was purple when new.

Do you have a STI? I just got to do a closed road course with a pre-production 2015 WRX. Super sweet ride!
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Old 03-20-2014, 01:18 AM   #13
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Originally Posted by 56cbr600rr View Post
photo owner is on challenger forum. It's a helpful pic. Mine looks like the pink; but I am pretty sure it was purple when new.

Do you have a STI? I just got to do a closed road course with a pre-production 2015 WRX. Super sweet ride!
I reposted the photo from that forum in two threads here because it's the best I've seen yet of the original purple color and the aged pink color change.

Sold the 2005 STI for the JKU and while the STI was a complete beast in all conditions it's not a convertible, doesn't hold 3 kids in car seats, can't drive on the beach, and I was ready for a change for now. I think the STI is one of, if not the best, all around sports sedan bargains of the last decade. VERY fast, very safe, excellent in all inclement weather and with very little modification spanks most vehicles this side of 100K. I would love to have a new 2015 STI but that's not in the cards right now but I'm OK with that.
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Old 03-20-2014, 06:19 PM
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I didn't update this thread (as I was participating in the other) - I took it to the dealer and they said "color change is normal due to heat" and "it's fine, just top it off as needed with the new purple". They gave me zero answer to the question: "What is the purpose of dying the coolant if the dye changes color over time?"

I am certain that Chrysler (FCA) corporate knows about this color change - so I'd really like to see an statement about the engineer goal of the color (since the color isn't an inherent feature of the coolant, it is added) and if color change is considered to be meeting this goal.
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Old 03-20-2014, 07:00 PM   #15
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Mine is a 2013. When looking into the top of the overflow bottle with the cap off, using a flashlight, it looks orange.
When viewing it from the side of the bottle with a flashlight, it looks purple.
I pulled some out with a baster, and it definitely is purple, and not pink, or orange!
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Old 03-20-2014, 09:39 PM
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Quote:
Originally Posted by Miser View Post
Mine is a 2013. When looking into the top of the overflow bottle with the cap off, using a flashlight, it looks orange.
When viewing it from the side of the bottle with a flashlight, it looks purple.
I pulled some out with a baster, and it definitely is purple, and not pink, or orange!
Miser, how old is your 2013? If you had it through last summer then I would expect (being in AZ) that your Jeep has experienced higher ambient temp than mine, which makes me question the idea of 'heat causes coolant dye to change color'.
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Old 04-08-2014, 10:19 AM
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Cross posting an update I found which addresses the COLOR of the coolant:

https://www.wranglerforum.com/f274/20...ml#post9710649

Specifically - the color of factory fill OAT in 2013 is very similar to the color of the parts department HOAT from 2000-2012. The color of parts department OAT 2013+ is distinctly purple, and not the same color as what would be in the Jeep from the factory.

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