Lesson learned: tighten your valve cores

[Gsinill]

I am new to tubulars.
Bought a nice wheelset from a forumite and wasn't too worried that the rear is slowly losing air after reading that this is kind of normal with tubulars...
Went for a nice ride today and after a while I could feel that the rear needed a little more air.
Screwed on the hose of my Lezyne Road, a few strokes, perfect (love that pump).
Went to unscrew the hose and swoosh, all the air was gone.
The adaptor of the pump unscrewed the valve core and there was no chance to tighten it enough without pliers (which I didn't have in my tool bag) so that the hose did not unscrew it.
Luckily I was only 2 miles from home and could finish the ride leaving the hose on, secured with a piece of rusty wire which I found in the ditch!

http://i57.tinypic.com/2d6vat4.jpg

[pdmtong]

been there with the lezyne pump...my solution, as is now yours I am sure, is that all valve cores get a slight twist with a needle nose before going on so this no longer is an issue.

nice mcgyer work in the field

wouldnt want to mess up that beauty. hats off to you for the torch work and restoration!

[Tony T]

a little loctite also helps

[ceolwulf]

I complained about precisely the same thing here, last summer. (with clinchers though)

Tightening the spare tube's valve core with a needlenose or whatever has solved it. Or I just get tubes without removable cores.

Leaving the hose in place was fairly clever though, that would have saved me one rescue ride home :help:

[shovelhd]

I use a little silicone lube on the valve core and the Zipp valve core tools. No issues.

[Tony T]

…the Zipp valve core tools.

Those tiny wrenches (http://www.zipp.com/accessories/detail.php?ID=16688) also fits nicely in the tool bag

[Gsinill]

been there with the lezyne pump...my solution, as is now yours I am sure, is that all valve cores get a slight twist with a needle nose before going on so this no longer is an issue.

nice mcgyer work in the field

wouldnt want to mess up that beauty. hats off to you for the torch work and restoration!

You bet and thanks :beer:

[weaponsgrade]

Nice field repair.

[ultraman6970]

If you hae problem with the cores just swap it for one that is in a clincher and just add some teflon tape to it. Bad idea IMO to use loctite in case you want to swap the cores at some point you know.

[PacNW2Ford]

Unfortunately, I have a grippy Lezyne too. This is much more elegant than needle nose pliers: http://www.parktool.com/product/valve-core-tool-vc-1

[Tony T]

Bad idea IMO to use loctite in case you want to swap the cores at some point you know.

You won't have a problem removing the stem with blue loctite.

[Gsinill]

Unfortunately, I have a grippy Lezyne too. This is much more elegant than needle nose pliers: http://www.parktool.com/product/valve-core-tool-vc-1

Looks nice but I decided to "enhance" my Topeak Rocket RX instead.
4mm notch filed into what looks like an otherwise fairly useless tire lever.
Works fine and no additional tool to carry/lose.

http://i59.tinypic.com/x2nyw2.jpg

[Black Dog]

If you can find them, there are valve caps that have a built in "socket" on the other side that fits over the core to allow tightening or loosening.

http://image.rakuten.co.jp/kyuzo-shop/cabinet/item12/ac-gf002427-1.jpg?_ex=128x128