oil sensor question

[l1ttle_d3vil]

If you are taking an oil feed from the same hole that the oil pressure
sender plugs into, then it will read low. Effectively, what it is reading
is the pressure drop across the turbo bearings.

Cheers... jondee86

ive got an autogauge oil pressure gauge with the correct sender etc etc. started the car up earlier and warmed it up, at a low idle (800rpm) the gauge would be reading around 10psi. it would rise pretty quickly with the revs to around 50psi at 2000rpm.
i'm waiting for it to cool down to see exactly what the pressure is when cold.
i've put the gauge sender in place of the factory 4age pressure sensor, with a t-fitting there for my turbo oil feed (t25 non bb turbo).

the oil i used was 15/40 and it is showing 3/4 on the dipstick.
i have a catch can setup with a breather on each cam cover, this shouldn't effect it would it?

the car is booked for the dyno on monday so need to get the sorted asap. is there anything I can check to ensure the oil is flowing as required. all I can think of is taking the oil return off the sump, I assume if oil is flowing out that line the pressure should be fine?

EDIT: After leaving it to cool for almost 2 hours, i've started it up again.
first of all I took the return line off the sump and started it up and idled it, no shortage of oil coming out the return line.
connected that back up and started it up again, now when cold it was about 40psi at 500rpm and 70psi at 2000rpm.
would the 10psi pressure i mentioned above be accurate, seems pretty low to me. should I be running a different grade oil or anything?

[Caveman]

It's a very dumb idea to get rid of the light.

I'll let you work that one out.

Steve

For the older 4age toyotas if the dash has a factory oil guage it typically doesnt have an oil light might wana get some experience before you post here...

if ur saying levins have one or the other, woudnt that mean i dont have an oil check light? since i have the pressure gauge.

on my other 4agze it has a sensor in the same place and it looks the same as the one thats on there now, same plug (1 wire)

Yes the sensors look the same with one wire, same plugs just slightly different dimensions but same thread. Did you get them mixed or swaped during the 4agte build? You can always find pressure senders on old 4ages from pick a part.

[bluemaumau]

the oil light is the 'your $&#$% light' anyway

[themaleman]

ok it was a 4agze if it matters,

and i have other 4agze sensors, they look the same but i havnt measured so ill do that and that should tell me if its the right sensor.

the sensor thats on there now was i assume the factory sensor on that engine

bluemaumau, what "@#$% light" are u refuring to?

the dash light i mentioned in the start of the post was fixed when i put a new battery in the car.

it the light infact wasnt fixed by the new battery what else would do it? (thats the only thing chaned)

cheers

[bluemaumau]

im just commenting on people saying you need a oil light.

if it comes on chances are damage has been done - hence the "your f.u.c.ked light" call

[MAGN1T]

im just commenting on people saying you need a oil light.

if it comes on chances are damage has been done - hence the "your f.u.c.ked light" call

Nah, if you shut it off straight away you're OK, so long as your not at full noise at the time.

In my experience there's only 2 things that I've seen cause sudden loss of pressure.
One was on a workmates car, he'd just recently fitted a pressure gauge and threw away the switch for the light. The plastic line for the gauge was too close to the exhaust, melted and, bye bye motor.
The other was in my A30. The drain plug went AWOL. Motor was OK because I had a light.

Steve

[Dell'Orto]

I seriously doubt the 4-6psi that activates the oil warning light is enough to save bearings under load for any length of time

[matt dunn]

I seriously doubt the 4-6psi that activates the oil warning light is enough to save bearings under load for any length of time

Can also tell you a 25psi switch is not enough to save bearings that go without oil for 5 seconds under load.

[MAGN1T]

I seriously doubt the 4-6psi that activates the oil warning light is enough to save bearings under load for any length of time

Can also tell you a 25psi switch is not enough to save bearings that go without oil for 5 seconds under load.

It should never happen in the first place.
Low oil level= lazy on maintainence.
Bearings don't just spin due to no oil, they also spin due to too much knock..... which happens at full load.

Steve

[Alex B]

Who says it was because of oil level being low, was probly on a race car in matt dunns case, could have been oil pump failure or any number of other things.