Under the valve cover where the valve springs are.
No. The valve springs can remain on the head when removing the head.
A valve spring compressor is used to remove collets in a car. The tool compresses the valve springs in the cylinder head of the car allowing the collets to be removed.
Type your answer here... They are in the cylinder head.
Valve stem seals help prevent oil from leaking into the combustion chamber through the valve guides. They also help control the lubrication of the valve stems and guide them properly within the cylinder head.
valve cover
The cylinder head and valve gear.
If the head is still on the engine, you can purchase a kit at most auto parts stores that includes: an air fitting to keep the cylinder filled with compressed air to prevent the valve from dropping into the cylinder, and a special wrench to attach to the rocker stud and press down on the spring retainer while you remove the locks. If the head is off the engine, you will need a valve spring compressor, which is a large c-shaped tool that pushes on the valve's head on one end and the valve spring retainer on the other end. Also you can buy/rent a valve spring compressor that you can use while the head is still on the engine but you will still need to blow air into the cylinder through the spark plug hole to keep the valve up.
First of all the air is for holding the VALVES up in the head so they don't fall down into the cylinders when you take the valve springs off of the valves. You should have a trained mechanic do that job for you. If the valve falls out of the head then you will have to remove the cylinder head to get it out.
Valve cover gasket holds oil from the valves from leaking off the top of the head . Head gasket is lower and holds cylinder pressure between the cylinder head and the engine block.
There is one intake valve for each cylinder. It is located in the top of the head. If you remove the valve cover, you can see the stem of the valves by peeking through the caps in the valve spring. If you want to replace a valve, it will be necessary to first remove the cylinder head.
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