Tires valve cores

[Jerry Emert]

Are the valve stem cores in these truck tires the same as in an auto?  I’ve got one leaking and a flat. Would rather replace myself instead of call someone. I’ve done car tires but not the higher pressure truck tires. Thanks for your time.
Jerry

[David T. Richelderfer]

Our Marquis has metal (I assume steel) stems bolted into/onto the wheel.  If the inside-the-wheel seal of the stem is corrupted causing the leak from the stem where it's bolted onto the wheel, then a new stem is likely needed.  If the leak is at the valve, then a new valve is likely needed.

If the leak is at the wheel, then I suggest first tightening the nut that holds the stem onto the wheel.  It may simply have loosened up.  If that doesn't fix it, then a trip to a tire shop, or O'Reillys or Autozone, to get a new stem and/or valve is easy.  Someone at the shop or store should know what you need.

The problem is you may have to remove the wheel and tire from the RV to break the bead so that a new stem can be inserted from inside the wheel.  Thereafter, getting the bead to reseal so it can be filled with air could be an issue.  And removing the wheel's stud nuts and replacing them is another issue with which to fight.  I hope it's not a leak on an inside dual tire.  That brings on a whole lot of complications dealing with a stem extension.

Good luck!  I would take mine to a tire shop if one is nearby... assuming you can get enough air in the tire to drive it that far.

[Jerry Emert]

Thanks. I think it’s something simple because that tire,outside dally, was just replaced roadside about a month ago. It leaked once before a couple of weeks ago. I found the extension was loose where it connects to the hub cap. I tightened it up and filled the tire and thought it was fixed.
Thanks again.
Jerry

[Richard Davis]

I struggled with flexible valve stem extensions for years.  I always had leak issues.  Someone on the Monacoers web site pointed me in the direction of the Borg Dually valve stem kits.  They specifically make a kit for the wheels that Monaco used on our motorhomes.  Mine was kit DL4M.  You need the kit with the rubber inserts that fit your wheels.  They are (sadly) very expensive, but you just buy them once and you are good for the life of your motorhome.  I highly recommend them and I have no financial interest in their business, I just really like the product.
Richard

[Roy Boles]

    The valve cores seem to be the same as car or pickup wheels.  I’m constantly having trouble with valve cores on my coach. I order a valve core kit from Amazon that came with 20 or so cores and removal tools.

[David T. Richelderfer]

If your coach's tires use balancing beads, as mine does, then the valve cores need to be "scorpion tail" cores so that the beads, or bead pieces, do not climb up the valve stem to foul the core.

[Frank Bergamo]

Before I check air pressure, I apply a shot of air into tire to clear any beads that may interfere with the sealing of the valve core. This has worked well for me. Hope this helps!