That would be the part of the wheel where you add air to the tire.
Rubber valve stem seals are the parts used to keep tires from leaking around the valve stems. They provide a tight seal which also keeps them securely in place.
yes
It is a small round rubber are plastic seal with a hole in the center of it, And it goes over the valve stem in the head to keep oil from running down and into the combustion chamber- where the spark plug goes into the head. If you remove the valve cover you will see several springs and they go over the valve stem and seal.
You may be referring to the valve stem on each wheel.
Fit a new valve stem.
It is possible that a piece of the rubber washer or some material has slightly plugged it in the diverter.
Attached to the valve stem inside the tire/wheel.Attached to the valve stem inside the tire/wheel.
If you are referring to the stem packing, you should be able to do it with no problem under pressure. Shut the valve off, take off the handle, then the nut with the packing in it, remove the old packing, replace it and reinstall the nut and handle. Open the faucet completely and that should be it.. Some valves use a rubber formed packing instead of the graphite or Teflon rope packing. Generally you can use either in place of the rubber or use a small amount around the stem with the old rubber.
In the tire. It is the valve stem.
The valve guide is a precise hole in the head that the valve stem slides in. The valve is retained by the retainer and two valve locks.
If the refrigerant has escaped, get a a/c valve stem kit from a autoparts store. They cost a few dollars and come with a stem tool and a few valve stem core that resemble tire valve stem cores. If you still have pressure, you will need a special tool that costs about 40 bucks.
The spline that lifts and lowers the part to shut the valve be globe or gate valve