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Old 07-11-2017, 08:36 PM   #1
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Tire Valve Warning

I think my TST 507 FT TPMS system I just bought has paid for itself and I haven't even used them yet!

Let me explain. I was installing the TPMS sensors on my tires today and as I was screwing the sensor on one of the rear inner wheel valve stems, air started rushing out from behind the little nut on the valve stem itself. If you look at the first picture, the valve stem looks perfectly normal. However, if you look at the underside of it in picture #2, the bottom portion of the valve is completely worn off to the valve core. These are metal stems, not rubber. Apparently, the valve stem has been bouncing around and rubbing on the tire rim. These tires and valves were replaced just about 1 year ago. I don't know how much longer these stems would have gone before failing, but I'm sure glad I found out while the motorhome was sitting still. This problem was found on both inner tires on the rear axle.

Has anyone else had this issue? Is there some simple remedy out there that I'm not aware of? I'm getting ready to take a 2200 mile trip next month and a valve failure on the highway would not have been pretty. It sure surprised the heck out of me.
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Old 07-11-2017, 08:46 PM   #2
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Wow! Great catch!!!
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Old 07-11-2017, 08:51 PM   #3
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Bend it up....a little and slide a piece of hose over it
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Old 07-11-2017, 08:54 PM   #4
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They make rubber grommets to fit in the wheel hole.

http://www.realwheels.com/product/va...m-stabilizers/
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Old 07-11-2017, 09:01 PM   #5
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Main cause for this is that the tire shop did not tighten the jamb nut quite tight enough, allowing the valve stem to swivel & then rub the wheel.
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Old 07-11-2017, 09:02 PM   #6
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Tire Valve Warning

Must use the rubber grommets! Even more so when adding TPMS caps.
Hard to see in this pic. But there is a rubber grommet that keeps the valve stem centered in the hole.
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Old 07-11-2017, 11:05 PM   #7
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Yep that's the way it works, you can click on attached thumbnails for a larger view
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Old 07-12-2017, 01:55 PM   #8
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Thanks for all the replies. I ended up buying new valve extensions and valve stabilizers from ShinyRV.

Just to follow up, I removed the bad extensions. Below is a picture of one of them.
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Old 07-12-2017, 01:57 PM   #9
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Quote:
Originally Posted by aldera View Post
Thanks for all the replies. I ended up buying new valve extensions and valve stabilizers from ShinyRV.



Just to follow up, I removed the bad extensions. Below is a picture of one of them.


That should solve your problem. I ordered mine from same place.
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Old 07-12-2017, 02:10 PM   #10
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Thank you for the update they are important for those who may do a search of the subject in the future.
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Old 07-12-2017, 03:09 PM   #11
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Thank you for posting

I have a couple of valve stems sitting close to the edge of the wheel openings. Hadn't thought of this problem but it seems logical. I will be keeping a close eye on them and possibly installing the grommets.

Thanks!

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Old 07-12-2017, 05:11 PM   #12
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Thank you so much for that! What a disaster preventer)
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