It closes and keeps the VALVES shut when needed.
Yes.. The combustion chambers are different
No. The valve springs can remain on the head when removing the head.
A valve spring compressor
The camshaft opens the valve via its Lobes, against the valve spring, to open. The valve springs closes the valve back.
Valve springs keep valves firmly seated in the socket.
The valve springs.
Valve springs
Valve springs are not torqued they have no bolts on them at all, they are held in place by keepers that fit into the notches on the end of the valves.
you need to compress the spring with a valve spring compressor tool, and then remove the valve keepers, and retainer.
To change the valve seals on a 1995 Camaro, first, remove the valve covers and spark plugs to access the cylinder heads. Use a compression tester to relieve cylinder pressure, then compress the valve springs using a valve spring compressor to remove the springs and retainers. Carefully replace the old valve seals with new ones, reassemble the springs and retainers, and finally reattach the valve covers and spark plugs. Be sure to check for proper sealing and torque specifications during reassembly.
Under the valve cover where the valve springs are.
The function of springs in a combustion engine is to lift the weight of the valve and to keep valves closed.