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Old 10-27-2020, 03:14 PM   #1
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Valve core

Hey all. Got a leaky valve core on the passenger tire of my 2020 Bambi 22FB. It just bleeds air. Anyone knows if the Goodyear Endurance ST225/75R15 stock tires require a special valve core or any from your average parts place will do? Thanks in advance.
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Old 10-27-2020, 03:50 PM   #2
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Any from the same size stem will do
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Old 10-27-2020, 04:06 PM   #3
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Any from the same size stem will do
Thanks. Am a novice on cores. Do you know what size that would be for those tires? In a perfect world, I'd like to buy them before pulling out the current ones.
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Old 10-27-2020, 04:46 PM   #4
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I would just buy a stem that looks like what you have in your wheel and take the core out of it....I know there are different size cores for different applications, however I dont recall ever finding different ones for automotive wheels.
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Old 10-27-2020, 07:01 PM   #5
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I would just buy a stem that looks like what you have in your wheel and take the core out of it....I know there are different size cores for different applications, however I dont recall ever finding different ones for automotive wheels.
Has the valve in the stem been tightened?


If so, replace it. take it out and take the valve to a tire shop and ask for a replacement. maybe auto stores have em
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Old 10-27-2020, 08:13 PM   #6
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No, not any will do, it must be rated for 80psi minimum. The most common are rated for 50psi.
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Old 10-27-2020, 08:48 PM   #7
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I know the valve stems have different ratings, but am not sure the cores are different. The difference in the bodies of the stems is what I figured made the different rating.
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Old 10-27-2020, 08:56 PM   #8
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Has the valve in the stem been tightened?


If so, replace it. take it out and take the valve to a tire shop and ask for a replacement. maybe auto stores have em
Not tightened yet. We were about to leave a campground and I decided to top off the tires as the temperature had dropped significantly overnight.

Things were fine when I took the valve cap off but I think I damaged the core when plugging in the Viair in as it leaked right after. I didn’t take any chance and put on the spare before we left.

Left the trailer at our storage place and haven’t had a chance to return with my core tool to try and tighten it.

To avoid doing a bunch of trips back and forth to the trailer, I was hoping to buy the core before getting there if I can figure out which one to get.
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Old 10-27-2020, 08:59 PM   #9
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No, not any will do, it must be rated for 80psi minimum. The most common are rated for 50psi.
That’s why I’m asking. The ones I found to be readily available at a nearby auto place are rated 60 psi. Those seem to have a black rubber band. Online, I’ve seen ones rated at 200 with a red rubber band. Not sure if the colour is a standard to indicate rating.

Beyond psi rating, are they all the same size?
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Old 10-27-2020, 09:05 PM   #10
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I do some of my tire changes at home using a manual changer. I have worked on motorcycle, car, truck, trailer tires, ect. I have never ran into a different size core in any of them.

I just had to replace a couple of TPMS sensors. They were the red cores.
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Old 10-27-2020, 09:09 PM   #11
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Quote:
Originally Posted by CRH View Post
I do some of my tire changes at home using a manual changer. I have worked on motorcycle, car, truck, trailer tires, ect. I have never ran into a different size core in any of them.

I just had to replace a couple of TPMS sensors. They were the red cores.
Thatís helpful. Thank you.
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Old 10-27-2020, 09:13 PM   #12
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I know the valve stems have different ratings, but am not sure the cores are different. The difference in the bodies of the stems is what I figured made the different rating.
Good point, I suspect you may be correct. The cores may be the same until you get to 100 psi. I will do some looking.

Edit: Oh I see from an earlier post they are not. Okay then.
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Old 10-27-2020, 09:22 PM   #13
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I have a drawer full of standard rubber valve stems, brass and rubber HP, and HP bolt in. If I was home, I'd pull apart one of each and look at the color of the cores.
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Old 10-28-2020, 10:24 AM   #14
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oh yes thats why I hate portable mini air compressor. never liked the inflator. it seems it is always so hard to flip the lid, then pull the inflator so hard out of the valve. I dont understand why the inflator has to be locked on valve.

why use this... https://th.bing.com/th/id/OIP.2pB69X...r=1.25&pid=1.7

why not use this...
https://th.bing.com/th?q=Air+Compres...ate&t=1&mw=247
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Old 10-28-2020, 12:05 PM   #15
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Valve cores are good for about 300 psi. It's the valve body that has pressure limitations.
Shorter length core is better than longer. Longer can have a tendency to let air escape due to rotational forces on the longer core spring, especially when the core extends beyond the stem tube.
Read about half way down the article here>
https://www.tirerack.com/tires/tiret...jsp?techid=208
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Old 10-28-2020, 02:20 PM   #16
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Not a special valve core.
But first, check that the valve core is secure in the stem. There is a handy tool for that or make your own using an old stem and a core cap.
I'll bet any tire store would give you an old rubber stem.
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Old 10-28-2020, 08:14 PM   #17
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Quote:
Originally Posted by CRH View Post
I do some of my tire changes at home using a manual changer. I have worked on motorcycle, car, truck, trailer tires, ect. I have never ran into a different size core in any of them.

I just had to replace a couple of TPMS sensors. They were the red cores.
I went ahead and bought red cores. Also bought a handy tool thatís got a preset torque just for valve cores. Very handy. Took out the old, it was indeed a red one. Exactly like the one I bought. I replaced it, and all is now good.

Now, I did encounter a new problem! I used my Viair compressor hooked up to the RV batteries (two Interstate 12V led acid and AS to shore power). I was able to fill the full tire I just replaced the core on (it was empty). However, I tried to top up my other tire (like 6 PSIs missing) and blew through 4 fuses. I tested back home on a jump pack, no problem. Is it because the AS batteries were too low? Any ideas as to what went wrong my helpful forum friends?!
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