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Thread: (2009) Can I Leave My Valve Stem Caps Off?

                  
   
  1. #1

    (2009) Can I Leave My Valve Stem Caps Off?

    OK this may be a dumb question, but can I leave the stem caps off during autocross?

    At the autox school we learned all about adjusting our tire pressures, and since there isn't a ton of down time between runs, it seems like leaving the caps off would be a good idea. Do they serve any purpose other than to keep gunk out of the valve?

  2. #2
    Senior Member 1996 328ti's Avatar
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    Caps prevent others from easily tampering with your air pressure.

    I don't see any harm leaving them off.
    ...steven
    BMW CCA #146825

    318ti.org | bmwcca.org/forum

  3. #3
    Senior Member mcoupemindy's Avatar
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    Quote Originally Posted by 1996 328ti View Post
    Caps prevent others from easily tampering with your air pressure.

    I don't see any harm leaving them off.
    Just throw them away. They are no good!

    Seriously, I don't even put any on my wheels as they are a nuisance to pull off every 2 seconds.
    Jonathan Thayer - jonathan.michael.thayer@gmail.com
    '99 Imola Red M Coupe, '08 Interlagos Blue Z4M Coupe

  4. #4
    Quote Originally Posted by 1996 328ti View Post
    Caps prevent others from easily tampering with your air pressure.

    I don't see any harm leaving them off.
    Hmmm...

    Note to self: Arch-nemesis mf44 may have easily tampered-with air pressure tomorrow


  5. #5
    Senior Member Pete's Avatar
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    Heck, I never even put them on anymore but I'm extremely lazy. It does no harm leaving them off.
    NCC

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    I leave 'em off too

  7. #7
    Senior Member mcoupemindy's Avatar
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    Quote Originally Posted by Scany View Post
    I leave 'em off too
    Weight reduction.
    Jonathan Thayer - jonathan.michael.thayer@gmail.com
    '99 Imola Red M Coupe, '08 Interlagos Blue Z4M Coupe

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    Talking

    Quote Originally Posted by ronh21 View Post
    Hmmm...

    Note to self: Arch-nemesis mf44 may have easily tampered-with air pressure tomorrow

    That's funny............
    Better turn your side mirrors down to the wheels just in case somebody is lurking....

  9. #9
    I go bare stemmed as well.
    Car54 ...well, now Car52

    Craig Brickner

  10. #10
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    Quote Originally Posted by mcoupemindy View Post
    Weight reduction.
    unsprung weight also!

  11. #11
    Senior Member mcoupemindy's Avatar
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    Quote Originally Posted by Scany View Post
    unsprung weight also!
    I heard on the internet that's good for 5hp on e30 318's.
    Jonathan Thayer - jonathan.michael.thayer@gmail.com
    '99 Imola Red M Coupe, '08 Interlagos Blue Z4M Coupe

  12. #12
    Senior Member 1996 328ti's Avatar
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    Quote Originally Posted by vjmvjmvjm View Post
    Just put in a drop of super glue. Then no one can mess with your pressure.

    Vic
    But first remove air.
    Not that I ever did that.
    ...steven
    BMW CCA #146825

    318ti.org | bmwcca.org/forum

  13. #13
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    I plan to always have my caps on until someone steals them, which is bound to happen with K1s.

  14. #14
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    I'm surprised no one has stolen my pretty chrome BMW caps on my 5 series yet. Though they have tried to peel the roundel off the hood at Famous Dave's in Vienna.

  15. #15
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    Changing air pressure? What's that?


    What traction control?

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