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Old 04-06-05, 08:30 AM   #1
skanking biker
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LEaky valve stem

So I was cleaning my bike last night and when checking the air pressure in my tires, I noticed that when I took the cap off of the valve stem on the rear tire it immediatley began to leak air. As long as the cap or my pump is on, it is fine, but in the 3 seconds it takes to take the pump off and replace the cap, I loose like 5-7 psi.

Is this something I should worry about?---It seems fine so long as the valve stem is covered.
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Old 04-06-05, 09:09 AM   #2
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If it's defective replace it. We are only talking about a tube.

Do you really want to be stuck at the side of the road because you didn't replace a tube that you knew was faulty?
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Old 04-06-05, 10:41 AM   #3
Doctor Morbius
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Quote:
Originally Posted by skanking biker
So I was cleaning my bike last night and when checking the air pressure in my tires, I noticed that when I took the cap off of the valve stem on the rear tire it immediatley began to leak air. As long as the cap or my pump is on, it is fine, but in the 3 seconds it takes to take the pump off and replace the cap, I loose like 5-7 psi.

Is this something I should worry about?---It seems fine so long as the valve stem is covered.
The guts of the valve may just need to be tightened clockwise. It requires a valve stem tool. If that doesn't fix it, toss the tube. Loose valve stems are fairly common.
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Old 04-06-05, 03:20 PM   #4
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Assuming a Scharder valve, tighten the core. If that didn't fix the leak, spray a little WD-40 into it, then press the valve pin with a small screwdriver to try and free up the spring.

Or you could just replace the $3.99 tube.(Wal-Mart)
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