Originally Posted by
simplex1
I have spare valve cores (from old tubes). I will remove the core from the tube with sealant inside (the one that I can not deflate or inflate) and replace it with another valve core. You gave me a good idea.
I always have at least several cores on hand saved from discarded tubes. You never know when you might need one from a ham fisted pump head install, a clogged or leaking core or a friend needs one etc.