I have a 93 Honda prelude so, h23a1. I need to know the position the flapper valves are open in and closed. Does anyone have one of these they can check quick. Fully clockwise open or closed or counterclockwise ? Thanks a million!!!!!

 

Not H23A but close enough:



Hope that resolves it for you. Fully pressed clockwise is closed.

 

They are called IAB's which contain butterfly valves FYI.

 

Yes and thanks for the picture this resolves all conflics about the issue. Thanks a million times for the great input. It is greatly appreciated!!!