Tubeless Valve stems clogging

Discussion in 'Shop Talk' started by rossage, Jul 28, 2017.



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  1. rossage

    rossage iMTB Hooligan

    Location:
    East Sacramento
    Name:
    Ross Lawson
    Current Bike:
    Highball
    I have been waging an ongoing battle with sealant clogging my tubeless, presta valve stems. I go to pump up my tires and the pump backs up with pressures up to 100 psi, then I need to take action. My valves clog and I need to remove the core to unclog the stem using various devices and also use a pick to get the sealant from around the removable core. This is an ongoing problem and I have yet to find a satisfactory solution.
    I currently use removable core stems from WTB. I have used Specialized, Orange Seal, Bontrager, and even stems cut from tubes in an effort to solve this problem. I use Stan's sealant with Gorilla tape.

    Possible solutions may include:

    Soaking the cores in ammonia (Stan's solution) but that involves removing the stem and core when clogged, which is always...

    Switching to Schrader stems? or will that just make a bigger clog?

    Or???
     
    Danmtchl, HBkites, UPSed and 4 others like this.
  2. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    It is unavoidable.....no matter what stems you use....no matter what sealant you use, they are gonna clog over time.

    The only sure way of preventing it from happening is adding valve core cleanings to your regular maint. or just replacing the valve cores on a regular basis.
     
    herzalot, Danmtchl, RS VR6 and 5 others like this.
  3. rossage

    rossage iMTB Hooligan

    Location:
    East Sacramento
    Name:
    Ross Lawson
    Current Bike:
    Highball
    This is not what I want to hear! I demand that answers to this thread contain positive, proven, effective measures to solve all of my life's problems. Take your negative Nancy attitude and stuff it with clogged valve cores!!!!!
     
  4. Makoto

    Makoto Member

    Location:
    Costa Mesa
    Name:
    Mike
    My issues have not been frequent with this topic, but they have been annoying nonetheless. I do almost exclusively use Stans, do other sealant users have the same issue?
     
  5. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower
    I know....life is all unicorns and ice cream sundaes.....a place where every kid gets a trophy. Sorry for my misguided views on reality. :notworthy:

    And stop calling my Nancy.....it's Shirley.
     
    DBMX119, herzalot, Danmtchl and 7 others like this.
  6. scottay

    scottay Well-Known Member

    Location:
    Gods Country
    Name:
    Scottay
  7. Runs with Scissors

    Runs with Scissors iMTB Hooligan

    Location:
    West Anaheim
    Name:
    Mark Whitaker
    Current Bike:
    2015 Giant XTC Advanced 1 29er
    Park the bike with valves between 9:00 and 3:00 position.

    I've never had a valve clog. o_O
     
    -ROCKY-, Danmtchl, Mikie and 4 others like this.
  8. scottay

    scottay Well-Known Member

    Location:
    Gods Country
    Name:
    Scottay
    Thats taking anal to a new high! :)
    .
    .
     
    Danmtchl, Mikie, HBkites and 3 others like this.
  9. rossage

    rossage iMTB Hooligan

    Location:
    East Sacramento
    Name:
    Ross Lawson
    Current Bike:
    Highball
    I don't see what is "anal" about not being able to pump up my tires correctly. I ride at 21psi F/R on Maxxis tires and I have found the performance to be very dependent on having the correct pressure. Since I ride several times a week, I check my pressure before each ride.
    If I wanted to be anal, I would grow a moustache, wear a Speedo, and beg for inches!

    wait! I see-I think you mean the 9 and 3 thing...that aint gonna happen.
     
    herzalot, Danmtchl, Mikie and 4 others like this.
  10. Runs with Scissors

    Runs with Scissors iMTB Hooligan

    Location:
    West Anaheim
    Name:
    Mark Whitaker
    Current Bike:
    2015 Giant XTC Advanced 1 29er

    I don't actually pay attention to that either, but it seems logical it would prevent clogging.
     
    Danmtchl and Mikie like this.
  11. evdog

    evdog Well-Known Member

    Location:
    San diego
    Name:
    Evan S
    How? When bike is stationary the stans will pool in the bottom of the tire. The valve core sits above that pool on the rim. So position of the valve stem between 9 and 3 won't do much.
     
    herzalot, Danmtchl, Mikie and 3 others like this.
  12. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    2018 Trek FEX
    • As J says, its unavoidable. Remove the cores and clean them off when necessary.
     
  13. Danimal

    Danimal iMTB Rockstah

    Location:
    Mission Viejo
    Name:
    Dan
    Current Bike:
    GG Trail Pistol!

    Do you have a coat hanger? Cut it and poke it through the stem. Then you'll be able to repurpose the poker for something else. :whistling:

    I have the same issue on stems, and I don't recall this happening before, so a cleaning is in order.
    I'll go to the "done something recently to the bike" thread now....
     
    Danmtchl, Mikie, rossage and 2 others like this.
  14. rossage

    rossage iMTB Hooligan

    Location:
    East Sacramento
    Name:
    Ross Lawson
    Current Bike:
    Highball
    I know how to unclog them but it has become an issue lately as they seem to be clogged every time I go to add air to my tires.
    I have sent an email to WTB, whose valves I am currently using, to see if there is a solution from their side.
     
    Danmtchl, SnakeCharmer and Mikie like this.
  15. bigringrider101

    bigringrider101 Well-Known Member

    Location:
    Winnetka CA
    Name:
    Berni Avila
    Current Bike:
    Jones Space Frame Ti truss for
    Is this AM or PM?

    That wouldn't help cuz' when you ride the bike the sealer goes everywhere including the valves.
     
  16. Danmtchl

    Danmtchl Well-Known Member

    Location:
    Bakersfield
    Name:
    Dan
    Current Bike:
    2015 Devinci Troy Carbon 27.5
    I see this alot with Orange Seal. It just clogs up the whole valve. Rarely see this with Stans or the crap Serfas sells.
     
    herzalot, mtnbikej and mike like this.
  17. mike

    mike iMTB Hooligan

    Location:
    Western US
    Name:
    Mike O
    Current Bike:
    GG Smash
    This supports my never experiencing it – and I always park my valves between 3 and 9 o'clock. :cautious::geek:
     
  18. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    2018 Trek FEX
    Have you experimented with where you leave the valve(s) positioned (valve submerged in sealant/or not) when your bike is resting and not in use?

    Maybe it's time to pop a bead, thoroughly remove all of the old sealant, and add all new sealant?

    You are taking into consideration that with this warm summer weather, sealant dries faster and easier?

    My Stan's valves leak air when the bike is sitting. I overcame this dilemma by making sure that the valves were at the bottom of the wheel when the bike was not in use so that they were submerged in sealant. Worked like a charm but dried sealant has semi-clogged the valves in return. Maybe this is what is happening to your valves, too?
     
    Danmtchl and mike like this.
  19. scottay

    scottay Well-Known Member

    Location:
    Gods Country
    Name:
    Scottay
    .
    Jeez, how much sealant do you put in?
    .
    .
     
    LLPoolJ, herzalot, Danmtchl and 3 others like this.
  20. konakc

    konakc iMTB Rockstah

    Name:
    kc
    mine did not clog. mine just broke off.. valve stem snapped and broke and gushed out air...walk of shame .. of course no extra tube when it happened... nice hike on the floop ...
     
    Danmtchl, mike and Runs with Scissors like this.
  21. mtnbikej

    mtnbikej J-Zilla

    Location:
    Orange
    Name:
    J M
    Current Bike:
    SC Chameleon SS, SC Hightower

    518MGMVSXRL._AC_UL320_SR222,320_.jpg
     
  22. konakc

    konakc iMTB Rockstah

    Name:
    kc
    Stem got traumatized from outside..sticks.. pebbles ..who knows?
    I guess I'm just badass rider...haha..

    Replaced stem..not a drop of Orange left...
     
    Danmtchl likes this.
  23. HBkites

    HBkites Well-Known Member

    Location:
    Huntington Beach
    Name:
    Sharone
    Current Bike:
    Why Cycles S7
    Are you using the "race" sealant?
     
    Danmtchl likes this.
  24. Danmtchl

    Danmtchl Well-Known Member

    Location:
    Bakersfield
    Name:
    Dan
    Current Bike:
    2015 Devinci Troy Carbon 27.5
    I use Stans and just park my bike however without concern to the valves, never had a problem yet.
     
  25. SnakeCharmer

    SnakeCharmer iMTB Hooligan

    Location:
    Crescenta Valley
    Name:
    Mike, aka "Ssnake"
    Current Bike:
    2018 Trek FEX
    46 ounces in a 29er wheel. Anything less, you may as well just run air.
     
  26. RS VR6

    RS VR6 Well-Known Member

    Location:
    Valencia/Simi
    Name:
    Lee
    Current Bike:
    Banshee Shartfire/Chiner 29r
    It takes a quite a long time for my valves to clog. I'll usually just replace the valve core. You can buy a pack of 10 on eBay for under $5.
     
  27. scottay

    scottay Well-Known Member

    Location:
    Gods Country
    Name:
    Scottay
    .
    .
    :Roflmao
     
    Danmtchl, mike and SnakeCharmer like this.
  28. Marty657

    Marty657 Member

    Location:
    Upland
    Name:
    Marty
    Current Bike:
    Santa Cruz TB2C
    Having the same issue I stared to put the v/stem at 1200 whenever I need to add air. So far this year it works.
     
    Runs with Scissors, Danmtchl and mike like this.
  29. Torrent77

    Torrent77 Well-Known Member

    Name:
    Dave
    Put a few dabs of this into the tire. :Roflmao:Roflmao:Roflmao:Roflmao
    imsi_unicorn_tears_ladies_tee_dd.jpg
     
  30. blixet

    blixet Well-Known Member

    Location:
    San Gabriel Valley
    Name:
    Tom
    Current Bike:
    Bronson
    Like wild, blind unicorn sex, another thing I've never experienced (clogged valves that is). So those tears are not shed for me.
     
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