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Thread: Amsoil ATF: thread sealant?

  1. #1
    Registered Member Belair-o's Avatar
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    Amsoil ATF: thread sealant?

    I plumbed in a remote transmission fluid cooler for the TH350 in my 57. There is a brass thermostatic sensor for the fan, which threads into a fitting in the fluid flow. I just used standard white thread sealant tape on the sensor threads. Looks like that was a bad choice, as I am getting some weeping of ATF from the sensor threads. Is there a better sealant I should be using on the sensor threads?
    Thanks, Doug

  2. #2
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    If it is a pipe thread, then yes you used the correct sealant. Have you tried tightening it more?

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    https://www.permatex.com/products/th...hread-sealant/

    edited the post with the higher temp sealant..

  4. #4
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    I've usually seem to have the best luck with Loctite 567 thread sealant for metal fittings. I've been using it for at least 30 years, after working in maintenance in a diesel engine factory, that's all we used, except for when tape is a better choice for like plastic fittings, etc.
    Last edited by 55 Rescue Dog; 01-07-2020 at 09:45 AM.

  5. #5
    Registered Member Belair-o's Avatar
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    Thanks for the replies! I will tweak the tightness on the fitting if possible, and if that fails, I have some Loctite 567 on hand that I will substitute. Thanks, Doug

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