If im not mistaken, during the power stage the intake and exhaust valves are both closed. the intake valve opens pulling air into the cylinder (cycle one) and the exhaust valve opens (cycle 4) to relase the air fuel mix that was ignited.
-intake: exhaust closed, intake open -compression: exhaust closed, intake closed -combustion: exhaust closed, intake closed -exhaust: exhaust open, intake closed
the intake are next to the carb and the exhaust are next to the exhaust manafold intake are .008 exhaust are .012 with the engine warm good luck
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.
Both the intake and the exhaust valve are closed.
0.14mm intake and exhaust
During the four-stroke cycle, both the intake and exhaust valves are open simultaneously during the overlap period, which occurs at the end of the exhaust stroke and the beginning of the intake stroke. This typically happens just before the piston reaches the bottom of the exhaust stroke and just as it starts to descend for the intake stroke. The overlap allows for better scavenging of exhaust gases and aids in the intake of the fresh air-fuel mixture. The exact timing of this overlap can vary based on the engine's design and camshaft specifications.
The exhaust lifters will line up with the exhaust manifolds,Remove the valve cover if your working on a V8 and the valve that lines up with the exhaust port will be the exhaust valve,If it is a Chevy V8 they will be from standing in front of the car exhaust,intake,intake,exhaust,exhaust,intake,intake,exhaust.
The intake manifold is where the air and fuel mix and enter the engine. The exhaust manifold is where unspent gas and air exit the engine. In other words the intake manifold is where the engine breathes in and the exhaust manifold is how the engine exhales out.
17 intake 17 exhaust
The intake valves are in the intake ports, the exhaust valves are in the exhaust ports.
When the engine is hot .008 intake .012 exhaust or .007 intake .011 exhaust When the engine is cold
You will bend the rods and the valves and you will 'break' the engine