adding second mechanical oil pressure gauge

[callbald]

the 39 flathead has the original oil pressure gauge setup and would like to add a backup mechanical gauge. I don't trust the old gauge and don't want to disconnect it. Can I install a tee setup and so both gauges would function? Thanks

 

[JSeery]

The short answer, yep. Is the current sending unit at the driverside rear of the block? There may well be an unused opening that has a plug in it there.

 

[Bruce Lancaster]

The two stock openings are very close together but at 90 degrees to each other. If you don't have an oil filter one, the one pointing left, will have a plug in it...you need a 1/4 to 1/8 pipe adapter, probably already in the gauge kit, and the fittings that come with the tube. And a bit of manual dexterity...
If you have a filter, Tee into the line from back of engine BEFORE the last fitting at filter. This can probably be done with just the right female in/male out Tee fitting and a little pressure on the line to add a bit of curvature to make space for the Tee.

 

[39portlander]

Here is my arrangement on the 39 P/U, the first pick is an actual gauge with a ball valve that I can observe while out of the cab.

The second picture is the sending unit installed were the original one would be for a newer oil psi gauge in the cab next to fuel, H2O temp and volts.

 

[Floyd]

Just as a side note, the original Ford (King Seelley) gauges are very dependable and seldom if ever fail. The only "bad" ones I have seen where the ones that had been zapped by 12 volt conversions. Those are easy to tell because they don't work at all.
Just my opinion

 

[callbald]

added oil sensor giving much better reading and bingo sprung a like and installing new line. Issue, came with very kinky coiled plastic line installation kit. Anyone know how to straighten out the line??

 

[OLD AS I]

My tee off for oil pressure mechanical gauge and maintaining original electric gauge. Vertical line is for the full flow oil filter system return