Originally Posted by
alcjphil
Are the bubbles coming out around the valve or through the valve? The former could mean that the valve stem is leaking at the base where it is bonded to the rest of the tube. The latter could be nothing more than a valve core that needs to be tightened up
Pay closer attention to where the bubbles are coming from
Which is why I mentioned that the valve stem could be coming in bonded to it's "rubber" jacket. Andy