The best way to tell if the valves are closed is to observe the rocker arms. When they are both at the top of their travel, valves are closed. Feel the rocker arms and try to move them, if they move their at the top of their travel.
-intake: exhaust closed, intake open -compression: exhaust closed, intake closed -combustion: exhaust closed, intake closed -exhaust: exhaust open, intake closed
17mm or 0.016" both intake and exhaust. Valves closed.
Yes the intake and exhaust valves have to be close.
Trace the runners. You can see the exhaust runners leading to the exhaust valves, and the intake runners leading to the intake valves.
0.016" cold both intake and exhaust. valves closed
Exhaust valves are always smaller.
Both the intake and the exhaust valve are closed.
The intake valves are bigger, and lead to the carburetor. the exhaust valves are smaller and lead to the manifolds or headers.
The intake valves are in the intake ports, the exhaust valves are in the exhaust ports.
Closed
Closed
Closed.