oil pressure safety switch

[morgan_out_island]

Hello Don,
I have a late model A4 I just installed a new electric fuel pump and i'm not sure where the Oil safety switch goes?.
Looking from the flywheel end (lower right front ) I have some kind of electric switch? with one wire going to a pos side... All the pics I see show the oil pressure switch on the lower back side, just befor the trans...
The only place I see to install the new swtich has a nut with a slotted screw,
should I remove this and install the oil switch here?
Thank You Again,
Ray Roberts

[Don Moyer]

Ray,

The slotted threaded rod secured by a 3/4" locking nut in the fuel pump corner of the engine is the oil pressure regulating valve. You do not want to remove that threaded rod under any circumstances.

There is a brass screwdriver-slotted 1/8" pipe plug located just above the oil pressure regulating valve that can be removed to install the oil pressure safety switch. If you can't get that plug to turn, you can install a 1/8" brass "T" fitting ahead of the oil pressure sending unit located just behind the flywheel housing in front of the carburetor flame arrester and install the oil pressure safety switch in that location.

Don