Damn Valve Stem Caps! Please help

Guys, I've gotten myself into one hell of a predicament.

Both of my rear valve stem caps are stuck to beat the band. I cannot break those little buggers loose to save my life. I don't need to right now - my tires are inflated fine, but sometime when I'm going to want to remove them, I won't be able to. I've tried using wrenches / pliers, ect., but I always end up just twisting the valve stem itself, and if I hold it while I turn the top, the rubber just twists anyways, and I'm afraid I might split it. Any suggestions? Thanks a ton

Ridenour

Are they plastic or metal? Try heating them up with a lighter or a propane torch with a very low flame before turning. Just a bit of heat should be all thats required.

Thanks - They're metal with a rubber ring inside. Are you sure it won't melt the rubber inside or the rubbber on my valve stem?

Thanks - They're metal with a rubber ring inside. Are you sure it won't melt the rubber inside or the rubbber on my valve stem?
Well, the idea is to use a very small amount of heat. Try a disposable lighter first.

Ok thanks - I'll give it a go this weekend

Whenever I have a problem like this, I get out the Dremel tool and cut them off.

Whenever I have a problem like this, I get out the Dremel tool and cut them off.

Yep, works every time. Just make sure you cut the valve cap straight up the side. It will almost fall off.

Whenever I have a problem like this, I get out the Dremel tool and cut them off.

Call me primative... but i like to use the hammer first....jk