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09-15-2013, 04:59 PM | #1 |
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Schrader Valve Stems (original)
Mounted original Schrader valve stems (renickeled) on modern tubes. Checked underwater for leaks prior to mounting on wheels. Now notice some have developed very slow (i.e., months) leaks, presumptively at the valve itself inside the stem.
Should I have used (now use) some type of ‘sealer’ on the threads of the valve as I was installing them into the stem? Any/other ideas welcomed! Have watched several FB threads about poor quality of modern tubes; don't recall any of them accusing the rubber tube itself of 'leaking' through its pores? (not talking about splits/blow outs). |
09-15-2013, 08:00 PM | #2 |
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Re: Schrader Valve Stems (original)
I had one original stem that leaked at the core, I just kept changing the cores until finally one stop the leak. that was over two years ago and still no problem.
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09-15-2013, 11:15 PM | #3 |
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Re: Schrader Valve Stems (original)
More specifics please. How much loss over what specific time? 10 pounds in one year would not be any surprise.
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09-16-2013, 12:08 AM | #4 |
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Re: Schrader Valve Stems (original)
Material quality seems to be uneven. I bought 5 new tubes last year, and one just would not hold air, even overnight. I gave it a water test and nothing showed up. I sealed the threads on the stem, even though there were no bubbles showing there. I finally gave up and replaced it. I then filled it full of air and put it on my workbench. Y'know what? It held air for four months! I guess the pressure of the weight of the car was too much for it, but it could hold up on the bench? I could have avoided the aggravation by just spending the extra $16 for a new one a year ago.
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09-16-2013, 11:11 AM | #5 |
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Re: Schrader Valve Stems (original)
I had not had good luck with the original long style valve cores but have with the new shorter style. You should not have to use a sealer on them. If you do, you might have problems in removing them down the road.
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09-16-2013, 11:22 AM | #6 |
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Re: Schrader Valve Stems (original)
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09-16-2013, 01:41 PM | #7 | |
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Re: Schrader Valve Stems (original)
Quote:
I agree, no sealer on the core!
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09-16-2013, 01:55 PM | #8 |
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Re: Schrader Valve Stems (original)
I use to work for Schrader here in NC. We made tire valves along with cylinders. The tire valve division move on shortly after I started there. You would not want sealer on the threads, that is not where the seal is.
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09-16-2013, 02:53 PM | #9 |
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Re: Schrader Valve Stems (original)
I just replaced the four tires that were on the ground with Firestone's (19") as the ones on there were 40 yrs old. I installed 4 new metal stem tubes & 3 of them will leak down to 20-25 lbs in 3-4 days. For the side mounts I used two new Universal tires I had so I can get them out of the fenders if needed. In those I used my orig. metal stem tubes that were 40 yrs. old & they hold air. Maybe I'll try to replace the cores & see if that helps.
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09-16-2013, 03:01 PM | #10 | |
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Re: Schrader Valve Stems (original)
Quote:
I thought we just went thru this where Walt Bratton is having them made offshore but not in Vietnam. His are much better quality and made by an OEM supplier. Look at THIS and this ↓ . |
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09-16-2013, 04:48 PM | #11 | |
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Re: Schrader Valve Stems (original)
Quote:
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Mark Maron Ill., Region MARC & MAFCA MARC JSC Member MAFFI Trustee National Facebook Admin. https://www.facebook.com/groups/MARC.group/ A7191-Sport Coupe 29 Roadster 29-Town Sedan 29-Original Special Coupe |
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09-16-2013, 04:50 PM | #12 | |
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Re: Schrader Valve Stems (original)
Quote:
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09-16-2013, 06:16 PM | #13 |
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Re: Schrader Valve Stems (original)
news to me also,
i got 5 19" metal stem tubes a month ago, walt personally told me they are the best out there and he was having no problems... |
09-10-2021, 06:58 PM | #14 |
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Re: Schrader Valve Stems (original)
Has anyone taken over the mantle of original valve stem guru since Doc Kalinka passed away?
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09-11-2021, 12:21 PM | #15 |
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Re: Schrader Valve Stems (original)
I have been selling many sets of original tire valve stems and related parts.
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