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oil pressure

  • Thread starter Thread starter 93GtMustang50
  • Start date Start date Jul 13, 2010
9

93GtMustang50

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Jul 23, 2009
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Orlando
Jul 13, 2010
#1
  • Jul 13, 2010
  • #1
This sounds like a newcock question but I'll ask it anyway. How do I check the oil pressure of my engine? Also how do I replace the oil pressure sending unit?

Basically, while driving to clearwater beach today, stocker gauge dropped to below red at any RPM range. I don't know how long it was like that for, but I'd like to replace the sending unit before tackling that bear of a pump.

It doesn't seem as though I'm having any bearing issues (can't hear anything crazy), so I hope I caught it before It caused any serious damage if its not the sending unit. I remember on my 1991 it was on the block right above the oil filter and it was pretty simple. But from what I see on the 93 its a bit different. It also looks like a different style part. Is it still in and out?

Thanks,
John
 

jrichker

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#2
  • Jul 13, 2010
  • #2
You can replace to the oil pressure sender without having to jack up the car. The oil pressure sender is located next to the oil filter on the driver's side of the engine. It has one push on wiring connection, pull it off to remove the oil pressure sender. Unscrew the old oil pressure sender and you screw a new one in its place. Push the wiring connector back on and you are done.

OIl pressure gauge sender



If the sender doesn't fix it here are the instructions for installing a mechanical gauge...

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 brown/red wire on the radio wiring harness. There are 2 connectors in the radio wiring harness, but only one of them has the light brown/red wire you need for gauge illumination. Solder the gauge lighting wire to the light brown/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.

 
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