Oil Pressure Sending Unit?

it should connect near the oil filter on that looks like a small pipe.

Exactly as above. Directly above the oil filter on the drivers side is the sending unit. Should only have one wire going to it. Its a large round sensor.

would will need to remove the round sending unit to attach the hose for the mech gauge.

You can T it off so your stock gauge isn't dead. It always bothered me so when i swapped engines i hooked up both.
Do it help anything? No, but only cost like another $5 in fittings.

Agreed I hate dead gauges. I spent tones of time getting my gauges to work with the BS3

2000xp8 said:

You can T it off so your stock gauge isn't dead. It always bothered me so when i swapped engines i hooked up both.
Do it help anything? No, but only cost like another $5 in fittings.

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Hate a dead gauge too, just gotta read something!!!

agree also, dead gauges are horible, you will still look at it and be like oh chit

Do I sense paranoia in this thread?

dont tell me you have dead gauges in your car!

unacceptable to me in my street car.

GroverDill said:

dont tell me you have dead gauges in your car!

unacceptable to me in my street car.

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I have the fast dash in mine so no dead gauges here

84Ttop said:

I have the fast dash in mine so no dead gauges here

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I knew I liked you for some reason!

jrcg92 said:

I use mine for SCCA events. So I need an accurate reading on my oil pressure.

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So exactly what does an accurate reading do for you and what reading "freaks" you out?

Don't skip installing the flow restrictor described in the bottom of this tech note. It's a guaranteed engine saver if the hose springs a leak!

Mechanical oil pressure gauge installation..
1.) Remove old pressure sender. It is located down by the oil filter and has 1 wire on a push on screw connector.
2.) Install ¼” pipe tee fitting with a short ¼” nipple on the place where you removed the oil pressure sender.
3.) Install the original oil pressure sender back in one of the tee ports.
4.) Install the gauge line restrictor in the remaining port of the tee.
5.) Connect the flex tubing or hydraulic hose to the gauge restrictor. Be sure to route the tubing or hose away from the exhaust manifolds. Be sure to either use hydraulic hose or oil and heat resistant flex tubing for the pressure line. Do not use copper tubing for the connection to the gauge restrictor or engine. Over a period of time, the vibration will work harden the tubing and cause it to crack and fail.
6.) If the gauge is going to mount under the hood, connect it to the end of the hose or flex tubing. Use some Tie-wraps to secure the gauge and its plumbing to the wiring harness on the driver’s side inner fender.
7.) If the gauge is going to mount in the passenger compartment you get to find a place to run the tubing through the firewall. I suggest that you pick your spot from the inside since that is the area with the most difficult access. Do not run the tubing through the exact same hole as the steering shaft. It will tangle up with the steering shaft and cause major problems.
8.) Install the gauge inside the car in the location of your choosing. Connect the pressure line to the gauge and secure it out of the way of moving parts with Tie-wraps.
9.) Be sure to ground the gauge lighting wire to clean, shiny bare metal. Connect the other wire from the gauge lighting to a light blue/red wire on the radio wiring harness. There are 2 connectors in the radio wiring harness, but only one of them has the light blue/red wire you need for gauge illumination. Solder the gauge lighting wire to the light blue/red wire on the radio harness and cover the soldered joint with heat shrink.

How to solder like a pro - Ford Fuel Injection » How To Solder Like a Pro a must read for any automotive wiring job.

Be sure to use a gauge restrictor fitting in the pressure line going to the gauge. The restrictor will prevent all of the engine's oil supply from ending up on the pavement before you can stop it if the gauge line fails. I had a gauge line rupture, and the restrictor fitting saved my engine from serious damage.

jrcg92 said:

Do you have a pic of this thing installed? And this is a great write up.

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You'll get a better ide of what it looks like by using the drawings. Photographs of these small parts tend to blur the details in with the background stuff.