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Thread: ATTENTION: Know Your Jeep JK Wrangler Coolants and Save Your Engine!

  1. #261
    Nothing but a Thing MSJKU11's Avatar
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    Quote Originally Posted by BeRoyalKC View Post
    I didn't take the reservoir out and shine a light through it, but I'll do that next. My issue is when I replace the coolant thermostat I'll need to top the coolant off and I want to be sure I'm using what's in there. I'm assuming it's OAT since that's what it should've come with from the factory and I haven't noticed any issues (it either hasn't been topped off or it has been with the correct stuff). Outside of color there's no way for me to know if it had previously been flushed and incorrectly filled with HOAT, though.

    Might just have to consider a full flush to be completely sure.

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    I've never tried it but I wonder if you could mix some of oat that you purchase with a small sample from your reservoir to see if it reacts. Otherwise I'd probably do what you suggest to be on the safe side and do a full flush since it's realtivley easy.

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  2. #262
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    Quote Originally Posted by MSJKU11 View Post
    I've never tried it but I wonder if you could mix some of oat that you purchase with a small sample from your reservoir to see if it reacts. Otherwise I'd probably do what you suggest to be on the safe side and do a full flush since it's realtivley easy.

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    I think it takes a long time to react but I'm not sure. And yeah just need to start searching for the steps to complete a full flush. I'd imagine there's a video out there somewhere.

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    Last edited by BeRoyalKC; 01-12-2019 at 11:46 PM.

  3. #263
    Caught the Bug dotnetrob's Avatar
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    Question

    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.

  4. #264
    Old Timer HighwayTrout's Avatar
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    Quote Originally Posted by dotnetrob View Post
    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.
    Id go and ask them.
    en hopup veritas

  5. #265
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    Quote Originally Posted by dotnetrob View Post
    I recently got my coolant in my 2015 JKU changed at a Valvoline. They did a full flush and fill. I am assuming they use OAT but not 100% sure. Anybody know what coolant they use, obviously a Valvoline brand. Asking because I like to keep some on hand to top up as needed.
    Most Valvoline stores carry the MaxLife Antifreeze Coolant, it is a HOAT base formula with a special chemical called Alugard which makes it able to mix with any of the other coolant formulations, i.e OAT, HOAT, P-HOAT, so you are good to go. (FYI some franchise Valvoline stores carry different Manufacture of coolant besides the MaxLife, so you could call the store or stop by just to verify what they did use for piece of mind)

  6. #266
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    Excellent info sir , I have a 2014 Jku and my wife has a 2016 Fiat . I've never seen two coolants be so incompatible ,good job.

  7. #267
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    Part number mapping?

    Quote Originally Posted by NFRs2000NYC View Post
    The part number for OAT is 68163849AA

    I just spoke to my worthless Chrysler dealership (is there any other kind?) and the part counter told me that part # 68163849AA maps to 68175338AC but I can't find anything online that proves this. Canada thing? Anyone else confirm this?

    Thanks

  8. #268
    Nothing but a Thing boardsurfer's Avatar
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    Quote Originally Posted by awparker74 View Post
    I just spoke to my worthless Chrysler dealership (is there any other kind?) and the part counter told me that part # 68163849AA maps to 68175338AC but I can't find anything online that proves this. Canada thing? Anyone else confirm this?

    Thanks
    The AC designation is the formula that is not pre-diluted, meaning you have to dilute 1:1 with water before using. I just had this argument a few months ago with my local dealer. Note in the photos in the original post, the bottles say specifically that it is pre-diluted where this one (AC) doesnt say that. Also, the 5 year vs 10 year will designate if you have the right one.

    IMG_20190501_144450.jpg

  9. #269
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    coolant question

    question. bought a 2015 with 12000 miles on it the coolant looks orange, did the factory or dealer put the wrong coolant in?
    Attached Images Attached Images

  10. #270
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    Cooling System Cleaners

    Is the Mopar Cooling System Cleaner (part numbers 4856977AB and 4856977AC) compatible with OAT and HOAT?

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