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Old 04-10-2016, 05:18 PM   #1
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Unexplained new tire leak?

Two weeks ago I had new Maxxis tires installed on our new 2016 5th wheel to get rid of the "china bomb" tires. Everything was fine, no leaks, etc.(yes I check pressures) On our first trip out yesterday, a short trial run to a campground 1 hour away, I went out this morning to a almost flat tire. I was bummed, but ok, things happen. I put the spare on and came home. Now,,, I aired it up when we got home, put soapy water all over it, including valve stem of course, (which were replaced with metal ones with the new tires) , and in 5 hours now it has not lost one pound of pressure. We both looked very close, no nails, bolts, etc in tread...
I am not going to start a "blaming" type of thread thinking someone let the air out overnight, ,,,,,, I'd just like to know if I'm missing something? I'll check it again in a few hours before bed, I just hate to fight rush hour traffic in the morning to go back to the tire shop if nothing is wrong with the tire/wheel... In that case I guess I'd blame the humans that saw us come in the campground,,, I waved and they just looked at us... No biggy,,, just wondering... AGAIN this is wondering if I am missing something with the tire/wheel... Thanks,,, Monkey
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Old 04-10-2016, 05:33 PM   #2
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I would double check that the valve stem was installed properly. The metal stems have a rubber grommet with a taller section, closest to the stem. That taller section is suppose to fit through the hole in the wheel while the rest of the grommet fits flat against the backside of the rim. Occasionally, they don't get that taller section seated in the hole and catch a corner of it.

While holding onto the stem, I would loosen the nut, and remove the washer and make sure it's seated. If it is, put it back together and snug the nut up. Before you put it back on, give the tread a really good look for something small that is only leaking under pressure. If everything checks out, I would reinstall it and see if it holds air before taking it back in.
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Old 04-10-2016, 05:50 PM   #3
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I would double check that the valve stem was installed properly. The metal stems have a rubber grommet with a taller section, closest to the stem. That taller section is suppose to fit through the hole in the wheel while the rest of the grommet fits flat against the backside of the rim. Occasionally, they don't get that taller section seated in the hole and catch a corner of it.

While holding onto the stem, I would loosen the nut, and remove the washer and make sure it's seated. If it is, put it back together and snug the nut up. Before you put it back on, give the tread a really good look for something small that is only leaking under pressure. If everything checks out, I would reinstall it and see if it holds air before taking it back in.
Thankyou Don, I will go out and look again. I'll give it another 3+ hours.... They came home on the trailer from the tire shop and sat for two weeks with no problems... Again not to place blame,, but I caught the 'young person,, (less than driving age) putting on more china bomb tires when I had ordered Maxxis tires... So he (the nephew of the owner) had to reinstall two tires with my new tires... ummmm....
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Old 04-11-2016, 08:25 AM   #4
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update,, the tire/wheel sat all night in the shop, as of this morning has not lost 1 PSI.... ?
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Old 04-11-2016, 08:39 AM   #5
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It may be seepage on the bead or valve stem as indicated.

You could inflate 10% over max sidewall then bubble test beads bots sides as well as inspecting value install.

If no issues deflate to correct and mark caps so if next time one goes low yiu can see if cap is tampered.
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Old 04-11-2016, 08:47 AM   #6
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I had a problem with valve stems on our last 5er as well as my truck. Nary a problem when I pulled a tire and put it in my garage and checked them, but 3 of the 8 leaked around the metal bolt in valve stem with a load. 8 x $15 each, cured - refused to take them back to the installer as he wouldn't believe me when called.
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Old 04-11-2016, 08:55 AM   #7
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Still could have a small unseen nail in tire tread that leaks when rolling, I would look to a tire shop near by and have it dismounted and checked. Cost would be minimal for Pease of mind.

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Old 04-11-2016, 09:24 AM   #8
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Quote:
=monkey;3016631]Two weeks ago I had new Maxxis tires installed on our new 2016 5th wheel to get rid of the "china bomb" tires. Everything was fine, no leaks, etc.(yes I check pressures) On our first trip out yesterday, a short trial run to a campground 1 hour away, I went out this morning to a almost flat tire. I was bummed, but ok, things happen. I put the spare on and came home. Now,,, I aired it up when we got home, put soapy water all over it, including valve stem of course, (which were replaced with metal ones with the new tires) , and in 5 hours now it has not lost one pound of pressure. We both looked very close, no nails, bolts, etc in tread...
Monkey
If the problem persists I would take the RV to whoever sold, mounted and installed the tire, (and the new valve stem), and ask them find and fix the leak.

IMO unless you somehow punctured the new tire, (or if someone is letting the air out), the fix is their responsibly.

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Old 04-11-2016, 10:07 AM   #9
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Thanks for all the input. Guess I'll take the tire/wheel back to the tire shop tomorrow morning and let them look at it. Then I'll bring it home, put it back on the trailer and we'll go for another test run to the lake next weekend, which is only about 10 miles away. If load on the tire is going to make it leak, that should do it. Its very curvy roads. My concern is we have a cross country trip coming up soon,, I just don't want any problems. Thanks again, Monkey
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Old 04-11-2016, 10:27 AM   #10
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Make sure the schrader valve is tight. I've had tires leak when rolling, but not when static and tightening up the valve fixed the issue.
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Old 04-11-2016, 11:20 AM   #11
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Check valve gut. Make sure it is tight. Use a metal cap. They have a gasket. Like rigs use.
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Old 04-11-2016, 01:34 PM   #12
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Remember to spit test every time you interface with that valve.

They really are not designed for higher pressures and cheap ones leak.

Common issue for HVAC systems when dust cover not sealed.
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Old 04-11-2016, 01:46 PM   #13
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Get a kiddie wading pool or something similar large enough and deep enough to submerge the tire in and you will be able to find any leaks.

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Old 04-11-2016, 02:42 PM   #14
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Quote:
Originally Posted by monkey View Post
Thanks for all the input. Guess I'll take the tire/wheel back to the tire shop tomorrow morning and let them look at it. Then I'll bring it home, put it back on the trailer and we'll go for another test run to the lake next weekend, which is only about 10 miles away. If load on the tire is going to make it leak, that should do it. Its very curvy roads. My concern is we have a cross country trip coming up soon,, I just don't want any problems. Thanks again, Monkey
I had this happen recently on a new tire installed on my street bike. It was leaking at the bead and after removing it and putting back on I was told sometimes a little piece of rubber can fold over into the bead area. It is possible that it can also pop back out of the bead and never leak again. They never saw anything on mine and put it back on and it has held air perfectly since then. Strange things do happen.
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