Unknown Hole Purpose

[Walter74]

Hi Fellow Enthusiasts,

After a long time of unwanted pause, I am back putting my BJ7 engine together. Although I am not that old, I am afraid my memory lets me down. When mounting the oil pump I saw a threaded hole of which I do not know if and what should go there. Anyone have an idea?

 

[red57]

That's where the pressure relief valve drain tube goes

 

[Walter74]

Thank you for your fast reply. Now I remember….