put the piston to the top of the cylinder, attach air hose commector to spark plug hole and turn air on with enough pressure to keep valve closed when you compress the valve spring and take the keepers off to get to the seals.
the bead of the tire needs to be broken, the valve stem is fitted from the inside out.take the tire off then cut the vavle stem off from the inside and to put the new one on u got to put the stem tho...
Valve Stem Seal are designed to make sure no oil will spill into the engine piston as it eat the gas coming from the Fuel injector through the exhaust manifold.
I worked in a plumbing parts store for years. There are so many different stems and handles on showers. But basically wd-40 you'll need if they very corroded and metal. On the front of most tub...