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Thread: Mishimoto radiator

  1. #1
    Fresh Catch hyvltge's Avatar
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    Mishimoto radiator

    I recently decided to upgrade to the Mishimoto JK radiator. What is the absolute best coolant I can use? 2009 JKU 3.8IMG_8698.JPG


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  2. #2
    Meme King WJCO's Avatar
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    Quote Originally Posted by hyvltge View Post
    I recently decided to upgrade to the Mishimoto JK radiator. What is the absolute best coolant I can use? 2009 JKU 3.8


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    Whatever the manufacturer recommends.
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  3. #3
    Fresh Catch hyvltge's Avatar
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    Just found this great install video. I will be following it within the next coulple days to make sure I don’t forget anything.

    https://youtu.be/VBH-97P6m0E



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  4. #4
    Addict Ddays's Avatar
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    There's been several guys that had fitment issues with Mishimoto in the past. Please be sure to report back how your install goes. Pics would be cool too!

  5. #5
    Hooked PATRIOTKJM's Avatar
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    Quote Originally Posted by WJCO View Post
    Whatever the manufacturer recommends.
    What WJCO said, just remember to read the HOAT/OAT thread. Contrary to most beliefs coolant technology isn't magic. OEM's know this because if there was some magic serum they would be the first to adopt it as they could save on reduced material costs from a smaller radiator per say.

  6. #6
    Addict jeeeep's Avatar
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    since you're draining the system you should be able to use any anti-freeze brand you like that has aluminum protection.

    I've been using Prestone 50/50 for the last 3 years no issues- -after a full system flush.

    what you don't want to do is mix HOAT and OAT with each other or any non-compatible antifreeze.

    I think manufacturers moved to OAT to extend the life of the antifreeze.

    Since I drive my Jeep as a DD, wheel it and it's much heavier than stock now, I prefer to change the antifreeze more often just to satisfy my OCD.
    Last edited by jeeeep; 10-24-2017 at 09:41 PM.

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    It would be nice to know the before/after running temps of the engine. Possible on same route under similar conditions. Please let us know.

  8. #8
    Nothing but a Thing 2Cross's Avatar
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    My next door neighbor is on his 3rd radiator from them. They keep leaking. Hasn’t helped his overheating problems either.


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  9. #9
    Knows a Thing or Two
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    Quote Originally Posted by 2Cross View Post
    My next door neighbor is on his 3rd radiator from them. They keep leaking. Hasn’t helped his overheating problems either.


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    Sold one to another Jeeper because I decided to use the money for something else and just had to send him the original receipt due to a leak. I read something that its getting better (who knows how they knew it was getting better haha) and that there was quality issues for a while but I guess its trying to be lucky not to get a bad one from the past.

  10. #10
    Nothing but a Thing tdougherty81's Avatar
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    Quote Originally Posted by mastrcruse View Post
    Sold one to another Jeeper because I decided to use the money for something else and just had to send him the original receipt due to a leak. I read something that its getting better (who knows how they knew it was getting better haha) and that there was quality issues for a while but I guess its trying to be lucky not to get a bad one from the past.
    Yep that was me. lol

    I have yet to receive the replacement and its pissing coolant. Didn't make a year on that one. Was able to trace the leak to the upper driverside core/tank.
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