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

[magi]

OPSS Orientation

Should the OPSS be installed upright or can it be installed in any position ?

Thank you all.

[msmith10]

The orientation doesn't matter.
In the future you would be better off not posting on a 17 year old thread. Start a new one.

[zellerj]

I think the reason people post as a reply to older posts is because it is easier to reply (button right out front and easy to see) vs starting a new post. It takes me a while to figure out how to start a new post. It is not obvious.

Perhaps a sticky on how to post a new post would be useful if members object to resurrecting a old post on a similar topic.

[ndutton]

I'm one who doesn't object to resurrecting old threads once in a while. Most of the time there's some great information in them, this thread for example.