Simple Oil Pressure Sending Unit Tip

[dshepp806]

No way would I attempt removal in 'situ...too much of a wrisk.

BEST!

Doyle

[JJ 911SC]

Yeah, it took 140 Psi to get it out of the block...Stuck Oil Pressure Sender

[GermanLarrain]

The sender was bad, full of rust, no way it can meassure something.
I order the new sender, unfortunatelly it takes a month to get to my country. I meassure the preassure and was OK (15 to 65 PSI). In the meantime, I built a plug out of the same sender unit (see picture).
Definatelly, I'll address the torque issue when istalling the new sender unit.

[dicklague]

Originally Posted by Jim Sims

The torque to dismount the oil pressure sender can be very high - enough that the reaction force at the fitting into the engine case can break off or strip the integral engine case threads (it has happened). It is far better to dismount the fitting (by removing the hollow bolt) and pressure sender, mount the fitting in a vise and then remove/replace the pressure sender. There have been numerous "rigs" made with crows foot wrenches, etc. (and now one with a "shrink fit tube") but none of them appear the address the reaction torque or force hazard.

I just went through this. I could not get a 24mm wrench on the sender. Then I remembered the square block the sender screws into has a hollow banjo bolt through it. You loosen the second nut from the right 19mm and the whole assembly comes out. You could do real damage to the cases if you are not careful.

DO NOT put a lot of torque on that sender while it is in the car! As the poster above suggested take it out and put the brass block in a vise and then remove the sender.