After my big mouth stated what my spring plans were for my series, I have new issue. When I start it,the oil pressure light stays lit for maybe a second. But that is accompanied by a rattle from the top of the engine ( or it sounds like it). It is not a knock more like a pinging. But it goes away when the light goes out. Is this a sign of a possible failing oil pump? Or possibly the rocker assembly itself? I noticed there is a pipe that feeds oil to the head( or so I think) do these need attention at some point. Thank you gents..