well i was in the process of changing my intake... and well this thing snaps... i don't know what it is... it sits on the rear of the enging block (not attached through the intake) it sits on the block its self.... it has electrical connectors in the back and looks like an oil feed....could it be the oil temp sensor? as you can hopefully see the goldish color circle in the last picture...thats where it broke off from. (rear of the engine bay on the block)...any help would be greatly appreciated.

 

Looks like the oil pressure sending unit.

 

would it matter if its hooked up or not? cause the piping going to it broke off in the block

 

Yes, oil will shoot out when you start the spinning the engine.

Gotta fix it

 

BTW, it's a 1/8th NPT thread, shuold be easy to get out with an extractor.

 

On cars with electric fuel pumps, doesn't the fuel pump get its power from this switch? So that theres no fuel pumping when there is no oil pressure. As a safety feature so if you get in a wreck your pump doesn't spew gas all over the scene. I could be wrong but if you have a elec fuel pump you may not be able to start it without this switch, or bypassing it. Correct me if I'm wrong.

 

Naw, maybe in the newer cars...but our oil pressure switches (mines down by the filter, pretty sure) only act as a redundant switch...to keep power to the pump if the FP Relay fails....as long as oil pressure keeps the switch closed.

But that doesnt help you with your issue...you need to get the innards out of the hole if the pipe broke off...then get another short 1/8th nipple and connect to the block to your sending unit...alls good that way...everything works as designed.

 

i have a mechanical fuel pump in my car (its carbed)

yeah i went to napa to get the piping for it but didn't get the extrator...so ill have it fixed for tomorrow


thanks for you help

 

The OPSU does supply power to in-tank fuel pumps on the later models. Mine went bad in my 1992, causing the fuel pump to ALWAYS run as long as battery is connected - the OPSU gets a direct feed from the battery.

 

You're correct...but as I mentioned before, it's not a "failsafe" device in regards to oilpressure....look at your wiring diagram and you'll see that the oil pressure switch is in parallel with the fuel pump relay...this is incase the relay fails...and as long as the oil pressure is around 4-5psi or higher.

In fact, Vader did test the circuitry awhile back...i/e unplugged the oil pressure switch with the engine running...still ran...