Hi,
I inspected the valve open/close patterns by turning cam one full turn:
1. @ marker position: piston 1 top (all valves closed), piston 2 bottom (intake valves closed, exhaust valves open), piston 3 bottom (intake valves open, exhaust valves closed), piston 4 top (all valves closed)
2. @ 3 o clock from marker: piston 1 bottom (intake valves closed, exhaust valves open), piston 2 top (all valves closed), piston 3 top (all valves closed), piston 4 bottom (intake valves open, exhaust valves closed)
3. @ 6 o clock from marker: piston 1 top (all valves closed), piston 2 bottom (intake valves open, exhaust valves closed), piston 3 bottom (intake valves closed, exhaust valves open), piston 4 top (all valves closed)
4. @ 9 o clock from marker: piston 1 bottom (intake valves open, exhaust valves closed), piston 2 top (all valves closed), piston 3 top (all valves closed), piston 4 bottom (intake valves closed, exhaust valves open)
5. @ marker position: same as step 1
Looks like I am OK, any comment highly helpful, thanks. I will align crank marker, then close the engine.