Journey with Confidence RV GPS App RV Trip Planner RV LIFE Campground Reviews RV Maintenance Take a Speed Test Free 7 Day Trial ×
RV Trip Planning Discussions

Go Back   iRV2 Forums > MOTORHOME FORUMS > MH-General Discussions & Problems
Click Here to Login
Join iRV2 Today

Mission Statement: Supporting thoughtful exchange of knowledge, values and experience among RV enthusiasts.
  This discussion is proudly sponsored by:
Please support our sponsors and let them know you heard about their products on iRV2
Thread Tools Search this Thread Display Modes
Old 05-30-2023, 11:05 AM   #1
Junior Member
Join Date: Sep 2014
Posts: 5
TPMS problem-Inside dually valve leaks

Just installed a new TST TPMS on our Open Road. Five of the cap sensors went on OK and work great, but can't get the passenger side dually sensor to seat. The sensor goes on, the air comes out, but the sensor will not screw on far enough to stop the air leak. I've tried 5 different sensors on the valve, and all have the same result. Steel extension on the inner tire, and when I removed the valve core I expected the tire air to come out. But, none did. Any ideas on what the problem could be? Thanks!
2013 Excel Limited 33GKE, 2008 F-350 SD DRW
Trentkd5ia is offline   Reply With Quote
Join the #1 RV Forum Today - It's Totally Free! RV Community - Are you about to start a new improvement on your RV or need some help with some maintenance? Do you need advice on what products to buy? Or maybe you can give others some advice? No matter where you fit in you'll find that iRV2 is a great community to join. Best of all it's totally FREE!

You are currently viewing our boards as a guest so you have limited access to our community. Please take the time to register and you will gain a lot of great new features including; the ability to participate in discussions, network with other RV owners, see fewer ads, upload photographs, create an RV blog, send private messages and so much, much more!

Old 05-30-2023, 03:37 PM   #2
Senior Member
Ranger Smith's Avatar
Winnebago Owners Club
Ford Super Duty Owner
Join Date: Jul 2012
Location: Where the Rig is Parked
Posts: 1,386
Yea . . . Get rid of the extensions. I had the same issue . . . Most are junk and cause nothing but problems.
Steve and Joy
2014 Itasca Suncruiser 38Q
Where we are Now
Ranger Smith is offline   Reply With Quote
Old 05-30-2023, 03:45 PM   #3
Senior Member
Old Scout's Avatar
Join Date: Nov 2005
Posts: 7,301
Agree--many valve extensions don't seem to play well with TPMS systems/caps. Ideal solution is a single piece valve-stem, but they are hard to find with the proper length for a given application.
PS--believe TST offers a different length cap depressor peg for this issue--sold separately of course.
Old Scout
2015 IH45 Foretravel
2003 Alpine 40' MDTS [Sold]
New Braunfels, Texas
Old Scout is online now   Reply With Quote
Old 05-30-2023, 06:50 PM   #4
Senior Member
Ray,IN's Avatar
Join Date: Aug 2001
Location: North America somewhere
Posts: 29,465
I agree with the previous replies. If you must use an extension, screw it onto the sensor just long enough to add air, then remove it and place in your tool box until needed again, which for me is 2X a year since I adhere to the Federal Tire Placard in the vehicle.
2000 Winnebago Ultimate Freedom USQ40JD, ISC 8.3 Cummins 350, Spartan MM Chassis. USA IN 1SG 11B5MX,Infantry retired;Good Sam Life member,FMCA." My fellow Americans, ask not what your country can do for you, ask what you can do for your country. John F. Kennedy
Ray,IN is offline   Reply With Quote
Old 06-08-2023, 09:18 PM   #5
Senior Member
SuperGewl's Avatar
Winnebago Owners Club
Ford Super Duty Owner
Join Date: Aug 2004
Location: Oregon
Posts: 2,720
I agree you may have a bad extension. But you should try it on the other side first. Also, the question is, how centered the extension exits the outer wheel. Does it cause the sensor to hit against the inside of the outer wheel? By swapping the extension with the other side you will verify if it is actually bad or if the threads on the valve steam are bad. I have had to replace a brand-new solid extension that is the reason for buying 2 sets of them.
Retired Navy Submariner
2014 Itasca Sunstar 35F; 5 Star tuned; 2014 Jeep Cherokee TrailHawk
SuperGewl is offline   Reply With Quote
Old 06-09-2023, 07:49 PM   #6
Senior Member
Join Date: Apr 2015
Location: Rogers, AR
Posts: 2,375
Try that extension on another valve stem along with the TPMS to see if it works.
The extension has a small rod that goes down to the valve stem valve. If the rod in the extension is too long, it may not let the TPMS to seat properly. If that's the case, the same thing will happen on another valve stem.

The tire you're having trouble with may have a slightly different valve in the stem that doesn't depress quite as much as the others. That may also keep the TPMS from properly seating.

When you removed the valve (I assume from the extension) no air will come out because the valve will still be closed in the original valve stem below the extension. An extension isn't pressurized until you're either checking pressure or adding air. If you add a TPMS, it will hold all valves open to measure the pressure, so the extension will be pressurized all the time.

Do you know for sure if the air is leaking at the TPMS, or is it at the base of the extension?
2019 Fleetwood Discovery LXE 40M w/2021 Equinox
alank is online now   Reply With Quote
Old 06-13-2023, 09:16 AM   #7
Senior Member
Spidergawd's Avatar
Join Date: Nov 2020
Posts: 129
I agree with others that it's probably related to the extension. Consider replacing your valve stems and extensions with all metal stems, LIKE THIS. They require dismounting the tires, as they install from the inside, but they should solve this problem pretty much permanently.
JP & Karen
2017 Minnie Winnie 26A
Spidergawd is offline   Reply With Quote
Old 06-14-2023, 07:16 AM   #8
Junior Member
Join Date: Sep 2014
Posts: 5

Thanks for all the responses and good ideas!
The extensions are rigid and metal, and the sensor works on other tires.
We'll be getting new tires next week anyway, so I'll get some new extensions for the duallies.

Safe travelling!
Trentkd5ia is offline   Reply With Quote

leak, leaks, problem, tpms, valve

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Similar Threads
Thread Thread Starter Forum Replies Last Post
TPMS - TOAD OEM TPMS vs RV TPMS - Integrate swduns Toads and Motorhome Related Towing 11 11-22-2021 08:00 AM
Dually valve stem extensions and TPMS - Video Brantel Trailer Towing and Tow Vehicles Discussion 0 10-04-2021 05:57 PM
Valve Extensions for inside Dually Milwaukee Entegra Owner's Forum 3 12-01-2020 06:07 PM
F-450 dually valve extensions with TST TPMS lpkirby General Discussion 11 03-06-2014 09:11 AM
Question, Turning a one ton non-dually to a dually. Wildbob52 Trailer Towing and Tow Vehicles Discussion 28 02-09-2013 02:43 PM

» Featured Campgrounds

Reviews provided by

All times are GMT -6. The time now is 08:15 PM.

Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2023, vBulletin Solutions, Inc.