yes
17mm or 0.016" both intake and exhaust. Valves closed.
.004 inches for both intake and exhaust valves.
.16 inches both intake and exhaust valves
The two main types of valves in an engine are the intake valves and the exhaust valves. Intake valves allow air and fuel mixture to enter the combustion chamber, while exhaust valves enable the expulsion of exhaust gases after combustion. Both types of valves play crucial roles in the engine's efficiency and performance, ensuring proper airflow and combustion cycles.
From the front of the head it's EIIEEIIE. This is the same on both sides - (I=Intake, E=Exhaust) With the valve covers off the rocker that aligns with the exhaust port is the exhaust the other will align with the intake manifold runner this would be your intake
Both the intake and the exhaust valve are closed.
0.016" cold both intake and exhaust. valves closed
Valve overlap.
In a four-stroke reciprocating engine, both valves—the intake valve and the exhaust valve—open to facilitate the engine's four distinct strokes: intake, compression, power, and exhaust. The intake valve opens to allow the air-fuel mixture into the combustion chamber during the intake stroke, while the exhaust valve opens to release exhaust gases after combustion during the exhaust stroke. This coordinated opening and closing of the valves ensure efficient engine operation and optimal performance.
In a four-stroke engine, both the intake and exhaust valves are closed during the power stroke, allowing for maximum pressure to build from the combustion of the air-fuel mixture. Similarly, during the exhaust stroke, both valves are also closed momentarily after the power stroke until the piston moves up to expel the exhaust gases. However, the intake valve opens before the power stroke begins, and the exhaust valve opens at the end of the power stroke to facilitate the exhaust process. Thus, while both valves are closed during the power and exhaust strokes themselves, they open at specific times in the cycle.
During the power or combustion stage of a piston cycle, both valves are necessarily closed, because the expansion of gases is driving the piston down.
Intake valves run cooler than exhaust valves and they are made of different material, so their thermal expansion is less than the exhaust valves. Therefore, they can have a smaller valve lash clearance, since they won't 'grow' as much due to thermal expansion, and won't present the problem of slamming into the top of the piston as readily as exhaust valves with too-small valve lash clearances will. But, not all engines have dissimilar valve lash clearances on intake and exhaust. Many small single-cylinder engines have exactly the same clearance on both intake and exhaust valves.