I took off the pipe that was attached to the top side of my engine case that held the oil pressure sending unit (see picture). In addition, the pipe had the round VDO oil pressure sending unit sitting on top, that was not connected.
The engine tin hole around / above the engine case was big enough for me to tighten the oil pressure sending unit down with 25 or 26MM socket.
My question, does the unit ground itself to engine case? Also, I don't understand why there were two oil pressure sending units on the car - if someone could shed some light.
thanks,
Fern