Advertise on Bikeforums.net



User Tag List

Results 1 to 4 of 4
  1. #1
    Senior Member
    Join Date
    Mar 2005
    Location
    Madison, WI
    Posts
    2,209
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    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.

  2. #2
    Banned.
    Join Date
    Dec 2003
    Location
    toronto
    My Bikes
    specialized allez pro, giant tcr composite
    Posts
    456
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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?

  3. #3
    Name's Ash ...housewares Doctor Morbius's Avatar
    Join Date
    Oct 2003
    Location
    The adult video section
    My Bikes
    Too many to list
    Posts
    798
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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.
    I did not achieve this position in life by having some snot-nosed punk leave my cheese out in the wind. - Ed Rooney


    It's not that I'm lazy. I'm just highly motivated to RELAX!!

  4. #4
    Senior Member DieselDan's Avatar
    Join Date
    Mar 2003
    Location
    Beaufort, South Carolina, USA and surrounding islands.
    My Bikes
    Cannondale R500, Motobecane Messenger
    Posts
    8,524
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)
    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)
    Bikes use brakes to stop.

    If your bike has breaks, don't ride it.

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •