Oil Pressure Low Stop Engine (replaced sensor)

[Doubeleive]

well there's basically 2 scenarios 1. either the oil pump or o-ring on pump is bad (sucking air once part of the oil is up in the engine). 2. or something is seriously wrong with the engine. mine was the latter and the engine sounded perfect. most people have better luck, I would recommend checking the old oil for metal and/or drop the oil pan and inspect or replace the o-ring or pump.

 

[David Smith]

well there's basically 2 scenarios 1. either the oil pump or o-ring on pump is bad (sucking air once part of the oil is up in the engine). 2. or something is seriously wrong with the engine. mine was the latter and the engine sounded perfect. most people have better luck, I would recommend checking the old oil for metal and/or drop the oil pan and inspect or replace the o-ring or pump.

So no chance that the sensor is bad based on the video I posted?

Also, would the engine not start making noise if it were sucking air and not getting sufficient oil to the top end?

 

[Warriorpluto]

So no chance that the sensor is bad based on the video I posted?

Also, would the engine not start making noise if it were sucking air and not getting sufficient oil to the top end?

Just buy the truck and run it like my friend is doing. I would change oil pump and oring first. Just to make sure. If still no change then take a twenty minute trip. If you make it back home with no tapping then all is well.

 

[CobraKing]

So no chance that the sensor is bad based on the video I posted?

Also, would the engine not start making noise if it were sucking air and not getting sufficient oil to the top end?

@David Smith I think a faulty sensor would throw some type of engine code. Do you have an OBD-II reader to check for stored faults?

I think sensors aren't terribly expensive so you could try replacing that, but as @Doubeleive suggested you might want to take a look at the pump and O-ring first.

Any chance of you taking a look at the truck from the underside and checking the oil cooler lines?

 

[David Smith]

@David Smith I think a faulty sensor would throw some type of engine code. Do you have an OBD-II reader to check for stored faults?

I think sensors aren't terribly expensive so you could try replacing that, but as @Doubeleive suggested you might want to take a look at the pump and O-ring first.

Any chance of you taking a look at the truck from the underside and checking the oil cooler lines?

I look at the lines yesterday, they looked pretty good and clean. No apparent leaks or anything anywhere under the truck.

There is no CIL on right now, but I have a friend of mine bringing me his computer to hook up and check for stored codes and to also check that the gauge is reading correctly from the sensor.

 

[David Smith]

So I ordered a new sensor yesterday. This weekend, I intend on running some engine cleaner though the engine (any suggestions on best "on the shelf" brand?), doing an oil change and install new oil filter, install new oil pressure sensor and oil pressure sensor filter.

This way I can be relatively sure that there are not blockages elsewhere. If this does not work, I may end up pulling the pan and replacing the o-ring on the pick up tube. Hopefully it will not come to that, but if so, then I may just knock that out this weekend as well. Maybe.

Also I will be hooking up a computer to the truck the check for any stored codes.

 

[kbuskill]

So I ordered a new sensor yesterday. This weekend, I intend on running some engine cleaner though the engine (any suggestions on best "on the shelf" brand?), doing an oil change and install new oil filter, install new oil pressure sensor and oil pressure sensor filter.

This way I can be relatively sure that there are not blockages elsewhere. If this does not work, I may end up pulling the pan and replacing the o-ring on the pick up tube. Hopefully it will not come to that, but if so, then I may just knock that out this weekend as well. Maybe.

Also I will be hooking up a computer to the truck the check for any stored codes.

Kreen is my go to engine cleaner but it isn't available in stores.

 

[David Smith]

Kreen is my go to engine cleaner but it isn't available in stores.

That is what I have read so far on a lot of forums. Any idea on what the best stuff is that you could find on the shelf at O'Reilly or something? I don't have time to order anything. Sea Foam maybe?

 

[Doubeleive]

So no chance that the sensor is bad based on the video I posted?

Also, would the engine not start making noise if it were sucking air and not getting sufficient oil to the top end?

it just looks to me like when you start the engine the oil pan is mostly full, then as the oil level in the pan gets lower it starts to suck some air and cant keep the pressure up, it may be still giving enough oil to not cause a knock, then when you shut it off the oil goes back in the pan and it can make pressure again for a minute when you restart. that's just my theory.

 

[David Smith]

it just looks to me like when you start the engine the oil pan is mostly full, then as the oil level in the pan gets lower it starts to suck some air and cant keep the pressure up, it may be still giving enough oil to not cause a knock, then when you shut it off the oil goes back in the pan and it can make pressure again for a minute when you restart. that's just my theory.

Does the oil sit that high up in the pan when full? All the way to the oil pump?

It doesn't seem to drop pressure until the engine is warm. It will run for 10 mins when cold before the pressure drops. With your theory, wouldn't it drop as soon as some oil got sucked out of the pan?

Not knocking your theory, it really does make pretty good sense for when the engine is warm. Just not when cold.