Valve core that won't accept or expell air?

We'll never know what the real problem was. She took it to tire place, $39.00 for new valve stem.

Our Motorhome came with the screw on valve extensions. For the most part they work fine. A few years ago, I had a problem where one of the inner tires won't take air and if I tried to check the pressure the pressure would be 0. Like you, I took the extension off and blew air into it and it worked fine. Put it back on and it still did not work.

Our valve extensions have a jam nut which increases or reduces the amount of thread on the extension on both ends. On the end that attaches to the valve stem, I tightened the jam nut about 2 complete revolutions and then they worked much better. I haven't had a problem since.

It is possible there could be a problem with the valve core or the valve stem. I had a valve stem on a previous vehicle where the valve core would rattle loose. You can buy a valve core removal tool at any auto parts store for a buck or two. Remove the valve core and re-seat it.

-Michael

Use the little straw thing and shoot some WD-40 or penetrating fluid into the valve and let it set for awhile. Might free it up if it is frozen.

If you can't DIY, goeth to a tire shop and replace the operating part of the valve. FWIW, I have a small core wrench that might fit between the tires or at the most, demount the outside wheel and have at it. BTW, I can count on one hand the number of broken core stems I've seen. Improbable but totally possible.

DrewE wrote:
It's plausible that the valve stem could be plugged, I'd imagine particularly if there was something along the lines of fix-a-flat put in at some point.

If it were my problem, I'd probably remove the wheel (so as to get access) and see if I couldn't get things working by removing and replacing the valve core. If the air won't come out when the valve core is removed, it's probably time to go to a tire shop, I'd guess. It may be possible to free up whatever is causing problems by poking at it with a wire or something, but that strikes me as potentially a pretty dangerous stunt to try.

Thanks...I never thought about maybe tire has some fix a flat stuff put in it. I'll ask her.

Thanks

It's plausible that the valve stem could be plugged, I'd imagine particularly if there was something along the lines of fix-a-flat put in at some point.

If it were my problem, I'd probably remove the wheel (so as to get access) and see if I couldn't get things working by removing and replacing the valve core. If the air won't come out when the valve core is removed, it's probably time to go to a tire shop, I'd guess. It may be possible to free up whatever is causing problems by poking at it with a wire or something, but that strikes me as potentially a pretty dangerous stunt to try.