I changed the CVT fluid on my son's car, and I was surprised that the Honda washers I bought do not fit the fill plug bolt. The ones I bought fit the drain plug, but the fill plus is about 2mm larger. Since Honda doesn't seem to offer one, the solution would be to enlarge the opening in the drain plug washer.

Search Results | Honda Car Parts Direct

 

I wonder if the one you bought was for the engine oil? The one for the trans is bigger.

I bought a bulk pack of 50 for my engine oil (from Amazon) but when I needed one for the trans I just went to the dealer since I wasn't certain exactly what size it needed to be.

 

I bought a pack for the engine, and the others are marked for the CVT. I doubt I'll need 50, though. 😳

The CVT is filled to the bottom of the fill hole, but the fluid is still going to be sloshing around in there, so it needs a good seal. I'll put a rat tail file in a drill and enlarge the opening.

 

You can always do what many do -- reuse the old washer. If there's no visible damage and it's flat, it's almost certainly fine. Since it's the fill hole, you can easily replace with the correct washer at any time in the future if you want.

I reused the oil drain plug washer over-and-over for years and never had a drip on the garage floor.

 

Yes, I used the old one.

 

My notes with Honda numbers.: I bought these in bulk from Amazon.

Oil Drain Plug Washer 94109-140-00 14 mm 29 FT-LB
CVT Fill plug/washer 94109-20000 20 mm 32 FT-LB
CVT Check plug/washer 94109-20000 20 mm 32 FT-LB
CVT Drain bolt washer 90471-PX4-000 18 mm 32 FT-LB

 

+2

Even if there's a little bit of a lip pressed into it around the hole, it can be made flat again with a file. It's aluminum so it's very easy to do.

Unlike my Subaru crush washers which are kind of U-shaped in cross section and they do get deformed when the drain plug is tightened. I wouldn't try reusing one of those.

 

It's good you got them when you did because neither Amazon nor Honda seems to have them.

They list this, but I'm not going to take a chance.

 

Do an Amazon search for "Honda washers" and lots should come up from 3rd party sellers. For genuine Honda washers you'd have to go to the dealership ($$).

 

Seems like if you're going "take a chance" on any generic automotive part, a simple flat metal ring would be the place to do it. If it's the correct thickness (or reasonably close) with the correct I.D. and O.D. what can go wrong?

I'm going to wager that most manufacturers, including Honda, are buying these things in bulk from whatever supplier can give them the best deal. Then each adds a massive markup relative to their brand prestige when they sell them on to you.

 

What do you mean Honda doesn't offer one? 94109-20000 , 20mm

https://www.hondapartsnow.com/genuin...109-20000.html

You fill through the rubber plug on top of the trans.

 

The problem with crush washers is that they get crushed, and that can't be repeated.

 

Apparently they do - maybe, Is that for the 2015 0 2020? Those cars have a bolt on the side of the CVT. Dong a search on three different Honda sites showed nothing - only for the drain plug. And $1.03 plus tax for one small washer? Honda sells ten for $6.46 delivered.

 

That's for 2020, your son's. I've seen your posts enough to know that your son has the 2020 model. But that washer plug the drain plug washer sizes are the same across 2015 to 2020

That plug is not a fill plug, that's more like a gauge hole to see the fluid come out when the fluid is filled to the right level. High shipping price is the unfortunate rreality these days and it's even higher because fuel price is high thanks to our commander in chief.

 

As some people like to say, "You get what you pay for." The current gasoline must be much better than what we were buying last year. 😂

 

I went by the dealership to buy the washers, and they gave me two of each for free. The one for the fill hole was fiber rather than aluminum, like the original. My guess is that the dealership is buying a non-Honda washer. Strangely, the fill-hole washer would not go onto the plug bolt, even though it looked like the exact same I.D. I could have reamed it a bit, but the mechanic at the dealership said it was fine to reuse the old one if it was undamaged.

 

The next time I change the fluid, I'll have those larger washers.

 

Reusing the washer a few times is fine, but they do "wear out" eventually. They work as a s gasket because the metal deforms a bit when squeezed - it's relatively soft. When a metal is deformed, it goes through a process called work-hardening, where it gradually loses its softness and then begins to crack. This is the same process that makes a paperclip break when it's bent back and forth enough times.

So replacing it every time is for sure overkill, but it will start to leak eventually. Maybe when the washer is visibly squeezing out past the bolt head flange, and requires pliers and a wrench to unthread it from the drain bolt?

 

My old Toyota Camry used a fiber oil drain plug washer. I've seen fiber (Toyota), copper (VW) and now aluminum (Honda). It seems that just about any material can be used for this purpose as long as it can be compressed just a little bit and isn't vulnerable to oils.

 

I have lots of oil drain washers, and I use a new one every time. However, I'll never replace another washer. I got a pair of those quick-drain plugs. Flip a lever, and the oil drains out through a tube.