oil sensor question

[themaleman]

dose the oil gauge in levins indicate the oil level, heat, or presure?

i have recently got my 4agte running andwhen i start the car the oil gauge (next to the battery gauge) goes up to halfway, which seems normal from memory, but a few seconds later it starts droping untill its reading L

my turbo feed is t'd off the sendor if that would make any difference?

also the engine temp (i think) stays on also, the symbol is like a '+' with lines ontop of it

[jondee86]

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

[Caveman]

Sounds like you have a oil pressure light sensor attached to an oil pressure gauge. You need an oil pressure gauge sensor.

[crispy'86]

The ae92 trueno/levin models run an oil pressure gauge setup.

[themaleman]

im pretty sure its pluged in where it normally goes, as there only 1 plug/ sensor in that area.

ok so if the gauge is pressure that would explain the drop as oils passing it buy now right?

i have an aftermarket oil pressure gauge to install, where would be a good place to put it? (not the gauge is self - but the sensor)

but im still unsure whats causing that dash light to come on

cheers for the help thus far!!

[escortman]

best bet would to be go for oil filter sandwich plate or remote filter kit or oil cooler kits normally have room for them 2

[jondee86]

Thinking about what I wrote above... I probably over-simplified
the situation. The standard gauge sensor reads pressure in the
main oil gallery. Pressure in the gallery is due to the resistance
caused to the flow of oil, caused by it having to squeeze out thru
bearing clearances.

If you bleed oil off from the gallery, you will, to some degree, drop
the gallery pressure. By how much, depends on the percentage of
the total gallery flow that you divert to the turbo. If you are using
a small diameter orifice in the turbo feed, then the effect on gallery
pressure would be minimal.

The only way you would get a big pressure drop at the gauge
sensor position, would be if the oil to the sensor was passing thru
a small orifice before it reached the sensor. Sometimes this
is done to reduce pulsation at the sensor.

Anyways, I'd go with the sandwich sensor block as mentioned above.
Then you will have a place to fit your oil temp sensor as well

Cheers... jondee86

[MAGN1T]

The normal way to add a gauge is to use a T piece at the stock sensor.

Steve

[Caveman]

As I said previously check your sensor. If your oil pressure gauge is reading half with the engine off but key on then you have the incorrect sensor. The sensor reading half is effectively the sensor sending a signal to turn the oil light on. As oil pressure rises the gauge should fall which indicates the oil light to switch off. It is easy to get one or the other as both are very common.

If you have the correct sensor then jondee86 is on the right track however I would question the amount of oil being diverted from the head to the turbo. Turbo oil feeds (on wet floating bearing turbos, doesnt apply to BB) are restricted therefore largly decreasing the oil flow. Typically on past setups I have run and helped build, a t-piece with the sensor and oil feed has worked perfectly for the turbo and gauge.

[escortman]

with ur oil feed do u have a restrictor in it?

[themaleman]

the gauge dosnt read halfway when the cars off, and
i am unsure if thers a restricter in there but hers a pic,
[img][img]http://img293.imageshack.us/img293/3510/image004in4.th.jpg[/img]

i dont think i have enough room for a sandwich plate
[img][img]http://img356.imageshack.us/img356/3325/image003aa1.th.jpg[/img]

and as for the dashlight thats sorted now, i changed the battery (had battery light on to) and its sweet now!

is there anywhere else to put an aftermarket oilpressure sensor?

[touge rolla]

^^Picture confirms Caveman's diagnosis.

Sounds like you have a oil pressure light sensor attached to an oil pressure gauge. You need an oil pressure gauge sensor.

[jondee86]

I'd go with that diagnosis As soon as the pressure builds up,
the switch opens and the light (gauge) goes off. As said, should
work fine with a gauge sender plugged in there....

Cheers... jondee86

[MAGN1T]

On my V8, I put the turbo oil feed into the hole where the pressure switch used to live then at the turbo end of the feed I put 2 tees.
One for the pressure switch and one for mechanical gauge. I see yours has a banjo fitting but not impossible to do. There's often more space at the top than at the bottom.

Steve

[themaleman]

thanks again 4 all the input!

is where i have the T normally where the pressure sensor goes?
if the oil light sensor is where it normaly is im gussing that isnt the problem, so where would the pressure sensor be?

[themaleman]

i assumed that sensor in the pic was the pressure sensor, looks like its the factory oil light sensor, its hooked up as normal.

where is the factory pressure sensor located?

[Caveman]

same place, motor either has 'oil light' sensor OR oil pressure sensor, not both. Take that one off and replace it with a pressure sender.

[MAGN1T]

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

I'll let you work that one out.

Steve

[Alex B]

Not sure i would personally put a gauge sensor on the end of that. I tried basicly the same thing, ended up with the gauge sender weighing too much, snapping the brass fitting leaving the thred in the head. (3s-ge) Was a pita to fix, got it with an easy out, but still. Might be something to think about. Damn lucky I noticed the big oil stain on the drive way, before I drove away.

[themaleman]

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)