Can you remove a valve stem with pliers?
The pliers are just to hold the valve stem and prevent it from moving around. If the valve stem is rubber, you cut off the inside part and remove the stem from the outside. If it’s metal, unscrew the outside nut and remove the stem from the inside.
Can you replace valve stem without removing tire?
Originally Answered: Can you replace a valve stem without removing a tire? Yes, there is a valve stem removal tool which pries the stem out, but you need access from inside to replace the stem so you would need to take the tire off anyway for easy access.