b-series motor

[hatdude4]

at tdc are any valves open or opening???

 

[brian11to1]

for which cylinder?

 

[MikeBergy]

Quoted post[/post]]
at tdc are any valves open or opening???

yes
Cyl1 - ICEC
Cyl2 - IOEC
Cyl3 - ICEC
Cyl4 - ICEO

I = intake
E = exhaust
C = closed
O = you know...