If only one spring were used on each valve, the valve would surge and bounce because of the natural vibration frequency of the spring.
It's actually a type of clamp used to install or remove valve springs in auto engines .
There is one spring for each valve, if there are two intake and two exhaust valves per cylinder there will be twice as many springs per cylinder compared to an engine with one intake and one exhaust valve per cylinder.
Yes.. The combustion chambers are different
No. The valve springs can remain on the head when removing the head.
Pneumatic valves are used to close valves in high-speed internal combustion engines, pneumatic valves are mostly to help racing engines to get to high speeds.
High performance piston aircraft engines do have valve overlap, just like high performance engines used in land vehicles, and for the same reasons. Listen to the Continental O-470, IO-520, IO-550, even IO-360 at idle (or Lycoming IO-540) and you can hear the same exhaust note quality as a racing car engine.
A valve spring compressor
The valve springs hold the inlet and exhaust valves shut, so that compression can take place in the cylinder. Most valves are called 'poppet' valves and look like a mushroom. The spring fits around the valve stem and attached at the top by a disc and collets. The valves are opened against the spring tension, by the camshaft lobes, either directly or by push rods. On most engines the valves and springs are on top of the engine, under a tin or aluminum cover. Older 'side valve', 'flat head' engines have the valves at the side of the engine block. Not much can be done to valves, or springs, without first removing the cylinder head. The valve has to be accessed on both sides, in order to release the spring.
yes both the 8 valve and 16 valve engines are interterence engines
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.
All 1971 VW Beetle engines were manufactured with solid valve lifters.