CVT Oil leak or normal venting
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Thread: CVT Oil leak or normal venting

  1. #1
    Greenhorn
    Join Date
    Aug 2014
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    CVT Oil leak or normal venting

    So, I was checking my engine bay the other day and I noticed a sizable oil stain around the CVT fill hole.

    The stain feels wet/fresh so it's not from the assembly line.

    I haven't had the CVT oil changed yet, so there is no reason for CVT oil to be on top of the transmission!

    Also, I don't think that the mount on this side of the engine is hydraulic, so it shouldn't be fluid from the mount, either.

    Could this be just oil venting/seeping out of the CVT plug ? Does anybody else have the same thing ?
    Attached Thumbnails Attached Thumbnails CVT Oil leak or normal venting-cvt_plug.jpg  

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  3. #2
    Greenhorn
    Join Date
    Aug 2019
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    Speaking from the point of view of my non-CVT automatic trans, I know my transmission vent tube has a black plastic cap that could easily fall off (and has when I was filling with ATF one time). You should check your parts diagram to see if you have a cap on yours from the factory. I doubt that would cause any major leaking if it was missing though. Your leak doesn't look huge, but I don't have a CVT so take that with a grain of salt.

    For the NON CVT it's part #3: hondapartsnow.com/parts-list/2012-honda-civic-4dr_dx-ka-5at/at-transmission-case.html
    Last edited by amodedude1; 08-25-2019 at 07:01 PM.

  4. #3
    Greenhorn
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    It actually does have a cap and you can see it in the photo. It has a 90 degree bent rubber nipple/handle.
    I pulled it out and it was very oily on the bottom, which I wouldn’t expect with the car sitting there for a day.
    I suspect there are oil fumes that creep out from the rubber cap and make the top of the transmission case look like something is leaking on it.
    Attached Thumbnails Attached Thumbnails CVT Oil leak or normal venting-6a851f68-62ab-4556-9e7f-7d1dce5e02c0_1567451711172.jpeg  
    Last edited by pilot; 09-02-2019 at 02:15 PM. Reason: Added photo

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  6. #4
    Greenhorn
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    Quote Originally Posted by pilot View Post
    It actually does have a cap and you can see it in the photo. It has a 90 degree bent rubber nipple/handle.
    I pulled it out and it was very oily on the bottom, which I wouldn’t expect with the car sitting there for a day.
    I suspect there are oil fumes that creep out from the rubber cap and make the top of the transmission case look like something is leaking on it.
    I've been through 3 CVT fluid changes on my two civics. I can't say I've noticed fluid on top my plugs, but
    definitely dirt.
    The fluid level is way below that plug. I guess I can't say for sure whats going on there, if anything.
    Just curious, what year and how many miles?

    jasper
    2015 Honda Civic Sedan LX Auto:
    1) Modern Steel Metallic ~48,000 miles
    2) Alabaster Silver Metallic ~15,000 miles

  7. #5
    Greenhorn
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    It’s a 2014 with 40k mi. Haven’t gotten the code to change the oil yet.
    The stain feels fresh/moist. I guess I can clean it up and see if it comes back.

  8. #6
    Platinum Member fear24's Avatar
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    as far as i'm concerned, it's normal dirt and grime on it. i've changed my fluid now 3 times and every time, i go to pull the plug, it looks just like yours, and i have had to replace my plug as well when it decided to jump out of the hole and leave me! it's a sealed system except for that plug. unless you have spots on the floor, don't worry about it. i have 120k on my '14. so, i can say with certainty, don't worry about it if no spots on the floor.
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