Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Mentioned: 36 Post(s)
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Sounds like a simple traction problem. The threaded valves offer a gripping surface that smooth ones don't.
I don't know how much more traction you need, but start with the basics. solvent on a paper towel to wipe of any residual oil that might be left on the valves from the manufacturing process. If you have it, Acetone (not nail polish remover) is great for this, but uou can also use detergent and water.
Then remove and clean the pump's gasket the same way, so you end up with clean, dry rubber gripping on clean, dry brass. If possible, set the gasket as tight as necessary to work.
If that isn't enough, you need to creatively buy yourself more friction. There are nylon paints that offer good traction, or you can scrape some fine grit off sandpaper or Scotchbrite, and mix it into nail enamel to make a grip paint like that used for stair treads.
No need to use a whole bottle, just mix a dab on a piece of aluminum foil. Paint a traction band on the valve where the gasket holds, let cure 24-48 hours, and you should be fine.
An ounce of diagnosis is worth a pound of cure.
“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin
“One accurate measurement is worth a thousand expert opinions”
- Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance