Hello anyone know the thread size on the oil pressure sending switch is it 1/8 NPT or 1/4 NPT thanks in advance

I just replaced mine and if I remember correctly, it's 1/8 pipe


54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

Not to barge in but which hole on the side of the block is the best location? The engine builder used the one closest to the oil filter on my engine but most of the images I have seen have it closer to the middle of the block.

Durham Missouri

I may be wrong but I would think once the oil gallery is pressurized it would not matter the location of the sender mine is by the filter .

The threaded holes in the side of the block for the oil pressure switch are ¼” NPT.  The two holes at the very back of the block (bellhousing area) and the single hole at the very front of the block (by the fuel pump) are 3/8” NPT.

Lorena, Texas (South of Waco)

Now I am confused

On my Tbird, the sender is at the front almost just below the water drain plug.  The wire that comes off it is plenty long (repo wires) so I imagine it is in the proper location.





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

I just took a look at my sender and it looks like it is 1/4 pipe, not 1/8





54 Victoria 312;  48 Ford Conv 302, 56 Bird 312
Forever Ford
Midland Park, NJ

When using the "QUOTE" function I see nothing in the QUOTE box of the reply. Does it work for anyone else?

Try clicking or touching if your on a smart phone. That should expand the quote so you can read it. I'm not real sure why it is set up that way.

Durham Missouri