Run a compression test. If the valves are properly seating, the compression will be up.
The difference is "soft seated" or "metal seated". Soft seated valves are used in gas applications were any leakage is absolutely not tolerated. The materials used are Teflon or ceramic. Metal seated valves can have very tight shut-off, it all depends on the coating, pressure in the line, and the lapping of the surfaces.
Double seated ball valves will hold pressure from either end whereas single seated will only hold pressure rating from one end.
Valve springs keep valves firmly seated in the socket.
To view the heart's chambers and valves.
Both deal with valves. API6FA is for API 6A and 6D. API607 applies to soft-seated, quarter-turn valves.
Yes, 4 Valves per cylinder, and the spark plugs are located at the top of the cylinder head, through the valve cover and are seated between the 4 valves.
I think "poorly spelled" says it best.
It doesn't have an Egr valve.It doesn't have an Egr valve.
Valves may not open at proper time--engine may not run or run poorly
The intake and exhaust valves in an internal combustion engine remain closed primarily due to the force of valve springs. These springs exert pressure on the valves, ensuring they stay seated against their respective seats when not activated. Additionally, the camshaft controls the timing of the valve openings, pushing the valves open at precise intervals during the engine’s cycle, while the springs pull them closed again when the camshaft lobe rotates away.
seated or sitted
To put in trumpet valves correctly, first align the valve guide with the corresponding slot in the valve casing. Gently push the valve into place, ensuring it is properly seated. Rotate the valve to ensure smooth movement. Finally, secure the valve cap in place to hold the valve in position.