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So I did an oil change yesterday and I noticed my fill plug was on top of the CVT... Kinda scared so I got some HCF-2 to change it out today and it has popped out again after 100 miles?

I've searched and found a few people that mentioned the same issue but no solution.

Anyone have some insight?
 

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mine popped out...it was on the garage floor. i didn't realize what it was....held on to it for a bit. finally, gave up, threw it out. 2 weeks ago, i was making sure they changed the brake fluid as i paid for that as well as the tire rotation and such. next thing on the my list to do was change the transmission fluid, so i looked down there and no plug. i was like, wtf! i immediately thought the dealer had forgotten to put it back on when they did the comprehensive multiple point inspection few months back. i couldn't prove it, so i had to buy it myself. i got on line, looked up the part and then i realized that was what i threw out in the trash. it had popped out in my garage. i called to get a new one...it ranged from $17 to $26 at various dealerships. the parts lady asked my name and noticed i had just been in there recently, a few times. i said, yes, and the next thing i was going to do was the fluid change. she told me she's order it and no charge for me and to have me come pick it up. how nice of her. that's how you keep customers, in my mind.

anyways, this seems to be an issue. i'm thinking of rigging a safety wire to the new one so if it does pop out, it won't be lost.

but first, i have to get the front end repaired...got tagged Sunday morning. 17 yr old kid in '06 civic going way too fast in the snow and lost control and slammed into me. he was trying to turn right, as i was leaving the neighborhood. dash cam proved to be useful to the police!
 

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I just checked if mine was still there since I did a fluid change about 30k miles ago and it is. I wonder why they are popping out? I'm glad you're okay. Kids need to slow down!
 

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Mines been popping out too....

it's really loose in the hole.

I'm gonna try doing this.... I put a thin layer of Permatex grey around the plug hoping that it will "fill up" the space.. waiting for it to dry now.

(Hopefully I will remember to report back)
 

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save anyone future trouble....

here is the OEM part number if you ever find yourself needing one.

25615-5T0-004
 

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Mines been popping out too....

it's really loose in the hole.

I'm gonna try doing this.... I put a thin layer of Permatex grey around the plug hoping that it will "fill up" the space.. waiting for it to dry now.

(Hopefully I will remember to report back)
3 days of 60+ miles commute each way... and still holding in place.... I'll update in a week or so.
 

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I just found mine missing and assumed the tech at the dealership forgot to reinstall it (6 months ago). Called them and they are replacing it and doing another flush tomorrow, no charge. Should be a recall on this. I'll contact Honda North America Customer Service for good measure.
 

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Mines been popping out too....

it's really loose in the hole.

I'm gonna try doing this.... I put a thin layer of Permatex grey around the plug hoping that it will "fill up" the space.. waiting for it to dry now.

(Hopefully I will remember to report back)
I wouldn't want even a tiny piece of that to break off and end up in my transmission.
 

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What year(s) are these vehicles? Im curious if it is happening across the board or only certain years.

The fill plug will typically pop out if the fluid is over filled or the breather/vent tube is plugged.

However it could also simply be a crappy design. Not the first time.

ATF dipsticks on late 90s to mid 2000 Civics also would pop out as the dipsticks started to age.
 

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I have (2) 2015 Civics Lx.
I owned one since new.
Fortunately, I have not seen this problem.
I would not add any sort of sealer to the plug though.
 

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it's models with the CVT transmissions.

i have begun checking mine every month when i check the oil, refill the tires, etc.
 
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