Oil Pressure & Oil Temp sender gasket: common oil leak point
 

I finally got to this part of part of my engine clean up / refurb (not a rebuild) on my 91 C2.

This also includes the paper oil breather gasket.

Great DIY here for those with the engine still in the car:
https://rennlist.com/forums/964-1989...technique.html

I am adding my pictures from having the engine out and the intake manifold removed.

Oil sender gasket: 999 707 314 40
Oil breather paper gasket: 930 107 791 02

24mm wrench required to remove oil pressure sender
19mm wrench for the oil temp sender

Torque the M6 nuts to 7ft-lbs just like you would the valve cover nuts which are the same size. Make sure you note which color wires are connected to which terminal on the oil pressure sender. Take photos beforehand.

How much do you tighten the two senders on their mount? I'm replacing both as preventative maintenance.

The factory workshop manual doesn't list a specific torque for the two senders. (Page 13-28 in Volume 1)