Me and a friend of mine had a thought yesterday:

The accepted way to mount an oil pressure gauge is to use a tee from the stock oil pressure sensor's hole and stick the stock sensor on one end of the tee and the new gauge's line on the other end. You need to run a nylon line from the back of the block to the tee to prevent the brass fitting from work hardening and snapping.

Now, the sensor is a 1-wire sensor, leading me to believe that it ground itself out on the block. If the sensor it plugged into the end of a tee that is no longer attached by metal to the block, it wouldn't be able to ground itself.............so the sensor wouldn't work, right?

Discuss.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LudeyKrus &raquo;</TD></TR><TR><TD CLASS="quote">Now, the sensor is a 1-wire sensor, leading me to believe that it ground itself out on the block. If the sensor it plugged into the end of a tee that is no longer attached by metal to the block, it wouldn't be able to ground itself.............so the sensor wouldn't work, right?</TD></TR></TABLE>

Correct, that sensor needs to be grounded in order to complete the circuit. It then varies the voltage passing through it dependant upon the pressure of the oil.

 

It's an open cirucuit till you fall below xxPSI, and then it closes the circuit, probably throught the engine ground, yes.

-PHiZ

 

So the correct way to do it would be to ground the "T"?

Would you have to ground it to the block or could you ground it to the firewall?

 

You could ground it anywhere.

I was curious, b/c I've seen so many people route the tee off of the block, but not ground it out............so it kind of defeats the purpose of using the tee since the stock sensor is then useless!