Schrader Valve Question


Information and questions on GL1100 Goldwings (1980-1983)
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mytown
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Schrader Valve Question

Post by mytown » Tue Nov 28, 2017 4:04 am



My front tire takes forever to go flat but flat it does go, in about 4-6 weeks time if not a bit longer. I find no sign of puncture so I'm guessing schrader valve. Is there any great mystery about changing the valve core or is it just take out the old one and screw in the new? Any other ideas as to what could cause a slow, slow leak?



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RBGERSON
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Re: Schrader Valve Question

Post by RBGERSON » Tue Nov 28, 2017 8:04 am

Bad seat of tire, nail/screw/metal in the tire..as to changing the schrader nope that's it unscrew and screw in new one. puncture can be hard to find.
HAD LOTS OF GOLDWING 75-83
NOW INTO 1500'S..RIDING A 1998 SE

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RB

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mytown
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Re: Schrader Valve Question

Post by mytown » Tue Nov 28, 2017 4:52 pm

RBGERSON wrote:
Tue Nov 28, 2017 8:04 am
Bad seat of tire, nail/screw/metal in the tire..as to changing the schrader nope that's it unscrew and screw in new one. puncture can be hard to find.
I see what you mean about finding a puncture, that it can be hard to find. Lots of small crevasses in a tire for a tiny bit to hide. I changed the valve core and will monitor it regularly. Any sign of a problem the tire comes off for an in depth inspection.

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Re: Schrader Valve Question

Post by WingAdmin » Wed Nov 29, 2017 7:03 pm

Pump it up all the way, then take a spray bottle, put a squirt of dish soap in it, and spray it around the tire and the valve. You will likely find bubbles appearing wherever the leak is.

I have the same thing on my front tire, and it is the bead seat. I'll be sealing my rim this winter when I put new tires on.

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Re: Schrader Valve Question

Post by mytown » Thu Dec 07, 2017 6:29 pm

WingAdmin wrote:
Wed Nov 29, 2017 7:03 pm
Pump it up all the way, then take a spray bottle, put a squirt of dish soap in it, and spray it around the tire and the valve. You will likely find bubbles appearing wherever the leak is.

I have the same thing on my front tire, and it is the bead seat. I'll be sealing my rim this winter when I put new tires on.
Thanks for the tip WingAdmin. I sprayed around the tire and rim several times and was unable to locate the leak which is still present after changing the valve core.
Will be removing the tire for further inspection. I'm wondering what you mean when you say you will be sealing the rim.

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Re: Schrader Valve Question

Post by AZgl1800 » Thu Dec 07, 2017 7:09 pm

Take the wheel off the bike.

get one of those big plastic tubs from the dollar store, 48 qt size or bigger.

fill it with water and lower the wheel down to just below the bearings.

watch it for a while, if there is a leak, you will see some small bubbles.
add some Dawn dish washing soap to the water, makes those bubbles really show up good.
~John

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Re: Schrader Valve Question

Post by WingAdmin » Thu Dec 07, 2017 9:26 pm

mytown wrote:
Thu Dec 07, 2017 6:29 pm
WingAdmin wrote:
Wed Nov 29, 2017 7:03 pm
Pump it up all the way, then take a spray bottle, put a squirt of dish soap in it, and spray it around the tire and the valve. You will likely find bubbles appearing wherever the leak is.

I have the same thing on my front tire, and it is the bead seat. I'll be sealing my rim this winter when I put new tires on.
Thanks for the tip WingAdmin. I sprayed around the tire and rim several times and was unable to locate the leak which is still present after changing the valve core.
Will be removing the tire for further inspection. I'm wondering what you mean when you say you will be sealing the rim.
A bead sealer is a sealant you paint on the rim (after cleaning it) that levels out scratches and imperfections, and presents a good, sealable surface to the bead on the tire, to prevent the slow leaks:

https://www.amazon.com/Slime-10137-Bead ... UTF8&psc=1

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Re: Schrader Valve Question

Post by mytown » Wed Dec 13, 2017 1:41 am

AZgl1800 wrote:
Thu Dec 07, 2017 7:09 pm
Take the wheel off the bike.

get one of those big plastic tubs from the dollar store, 48 qt size or bigger.

fill it with water and lower the wheel down to just below the bearings.

watch it for a while, if there is a leak, you will see some small bubbles.
add some Dawn dish washing soap to the water, makes those bubbles really show up good.
Got it. You can see a line of small bubbles around the bottom of the rim:


There were several such spots. The bubbles were small and slow to rise. I brushed them away a number of times and they came back.
After the last time it went flat, I rode on the tire about 1/2 mile to an air pump. The tire inflated and the bead set, but I don't know if I damaged the tire or rim.

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Re: Schrader Valve Question

Post by WingAdmin » Wed Dec 13, 2017 8:46 am

Well it's one of two things then: a damaged bead on the tire (and yes, could be damaged by riding on when flat), or corrosion on the rim. Rim damage from riding on a flat tire would be plainly evident - scuffs, denting and/or cracks in the rim itself.

Either way, the tire is going to have to come off to fix. If there's corrosion you will have to remove the corrosion and seal the rim up before the bead will seal properly.

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Re: Schrader Valve Question

Post by mytown » Thu Dec 21, 2017 3:04 am

WingAdmin wrote:
Wed Dec 13, 2017 8:46 am
Well it's one of two things then: a damaged bead on the tire (and yes, could be damaged by riding on when flat), or corrosion on the rim. Rim damage from riding on a flat tire would be plainly evident - scuffs, denting and/or cracks in the rim itself.

Either way, the tire is going to have to come off to fix. If there's corrosion you will have to remove the corrosion and seal the rim up before the bead will seal properly.
I removed the tire and found a greyish, black material built up at certain points around the rim:


I ran it under a wire wheel and came up with this, note the pock marks:


I applied the rim sealer after the tire was put back on the rim but have not set the bead. I think it is possible that the grey/black material was put on as a means of dealing with the pocked areas but am wondering if rather than helping to seal the rim, doing so may have actually contributed to the leak. Just not sure if the rim is salvageable or how exactly to proceed. I also found this:


It's Ride On that I had put into the tire a few years ago. It's gooey and clinging to the crown of the tire. I saw no harm and I left it in place, but I'm wondering if it may have contributed to the problem.

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Re: Schrader Valve Question

Post by AZgl1800 » Thu Dec 21, 2017 7:54 am

I have noticed with all of my lawn tires, Golf Cart, Lawn Tractor, wagon wheels, etc...

That Slime is only good for one summer season. After that it is a friggin mess and useless.

When we bought our acreage, it was full of Locust trees with huge thorns on them.
Ice storms dropped a lot of limbs and if one was missed the lawn tractor chewed them up and spit them out leaving those 2 and 3 inch long thorns to puncture tires right and left.

I had to resort to Slime in order to keep from going broke taking the tires over to the tire shop and getting them fixed every few days. But, the next year, that stuff isn't doing its' job anymore.

No balance issues since nothing ever goes faster than 5 or 6 mph LOL
~John

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Re: Schrader Valve Question

Post by dingdong » Thu Dec 21, 2017 8:38 am

Your picture of the damaged rim is a perfect example of what can happen when dishwashing detergent is used to mount tires on "aluminum" rims. Not recommended.
Tom

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Re: Schrader Valve Question

Post by WingAdmin » Sun Dec 24, 2017 3:14 pm

dingdong wrote:
Thu Dec 21, 2017 8:38 am
Your picture of the damaged rim is a perfect example of what can happen when dishwashing detergent is used to mount tires on "aluminum" rims. Not recommended.
You got it. That stuff makes it nice and slippery and easy to get the tire on, but it causes the aluminum to corrode like crazy.

I use bead sealing lubricant, which is kind of like a grease, but when using balancing beads, you have to be very careful about using the minimal amount possible, and only on the bead area itself, otherwise the beads will stick to it inside the tire.

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Re: Schrader Valve Question

Post by PuppyWing » Tue Dec 26, 2017 1:12 am

WingAdmin wrote:
Sun Dec 24, 2017 3:14 pm
You got it. That stuff makes it nice and slippery and easy to get the tire on, but it causes the aluminum to corrode like crazy.

I use bead sealing lubricant, which is kind of like a grease, but when using balancing beads, you have to be very careful about using the minimal amount possible, and only on the bead area itself, otherwise the beads will stick to it inside the tire.
If cleaning the wheels, will using detergent cause corrosion?

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Re: Schrader Valve Question

Post by AZgl1800 » Tue Dec 26, 2017 10:17 am

not if you rinse it off
~John

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Re: Schrader Valve Question

Post by hondageorge » Thu Jan 04, 2018 1:40 pm

I too had a very, very slow leak in my rear tire. I noticed that the local tire store guys used a product called Xtra-seal bead sealer.
It said for commercial use only, and for a 32 oz. can, the large can with a brush inside is more then enough for a life-time, even changing tires on 4 different bikes and two cars.
It is made in the USA and contains toluene,natural rubber latex, & heptane. Made in Ohio . www.31inc.com Item 14-101 Use in well ventilated area, (out-doors) highly flammable, do not inhale.
I see that Amazon has it listed, but I got mine at Grainger's Supply for almost half the price. Naturally, if you don't have one close-by, shipping would negate any potential savings between the two. Good stuff that works if you do your part to clean the rim as best you can.
Has not failed me yet. No do-overs!



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Re: Schrader Valve Question

Post by WingAdmin » Thu Jan 04, 2018 11:13 pm

Yup, you can find it on Amazon for $20 with free shipping:

https://www.amazon.com/Xtra-14-101-Seal ... 523&sr=8-1






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