Oil sensor locations, fittings etc

[Shmed]

This place is really weird (IMOC I mean). I come here to post about oil sensor locations and where I can find a 1/8NPT splitter to allow me to connect 2 sensors to the stock oil pressure sensor, and Marf's link about something totally unrelated turns this up:

http://www.designengineering.com/catego ... female-all

[Shmed]

2 questions (off the original topic I know):

1. Will the distribution block linked above be ok for oil?
2. Is it accurate taking a feed from the stock oil pressure sensor location, and fitting 2 sensors in a place where there wouldn't be any oil flow?

[Marf]

I please to aim

I guess this is so you can tee off the pressure and temp sensors from the oil feed already in the block?

[Shmed]

I please to aim

I guess this is so you can tee off the pressure and temp sensors from the oil feed already in the block?

In one

[jimGTS]

i would use a braided line off the head before fitting any t-pieces....
last thing you want is a heavy sendor on a small t-piece to snap off and spill oil everywhere and kill the engine...

also, not sure how accurate oil temp is in this location..
oil temp should really be taken at the sump afaik.

[Marf]

i would use a braided line off the head before fitting any t-pieces.
last thing you want is a heavy sendor on a small t-piece to snap off and spill oil everywhere and kill the engine.

Agreed.

also, not sure how accurate oil temp is in this location.
oil temp should really be taken at the sump afaik.

Ideally yes, but its not gonna make much difference having it in the stock OPS location. I used to have my pressure and temp taken at the sandwich plate.

Jim, does your keyboard have a stutter?

[Shmed]

Yeah, I read that on another forum I think. They suggested a braided line from the block then off to a distribution block with the sensors, and then on to the turbo, so I think they essentially tapped into the turbo feed (I'd rather not do that though).

I can see the sense in what they are saying in that there would at least be oil flow then, whereas a braided line from the stock MR2 location to a distribution block would potentially give inaccurate readings as no oil would be flowing?!

The sump isn't an option at the minute though.

[Marf]

I can see the sense in what they are saying in that there would at least be oil flow then, whereas a braided line from the stock MR2 location to a distribution block would potentially give inaccurate readings as no oil would be flowing?!

There doesnt need to be flow to measure pressure or temp. Both are contact measurements.

[Shmed]

I'm thinking I might just bin off the original oil pressure sensor in lieu of my aftermarket gauge, then stick the oil temp sensor in the sandwich plate (before the oil stat).

My flea bay oil cooler/relocator is what is making this more difficult as it moves the sensors to a place that is fed through the top of the relief valve.

[jimGTS]

stutter?
nope.

i just like leaving lots of full stops....



yeh i thought i read somewhere the OPS location doesnt get a good recirculation of oil, so may not give ideal readings...
but to be fair, prob not alot in it.

[Shmed]

But, and forgive me if I'm being dumb, but to use an analogy:

If the oil is flowing round like cars on a busy street, let the hose be a dead end alley, once a few cars goes down the dead end alley, the first car in will have no chance of getting back onto the main street, so my sensor will always be sampling the same car?!

[Shmed]

I'm probably over thinking all this (too much time on my hands - or too much time stuck at work, and not enough time actually fixing my car.....)

[Marf]

If the stock sensor is anything like the sensors found on other Jap motors, it'll trigger the warning light at around 0.5 bar.

With that in mind the oil pressure warning light is more of a "you're engine is xxxxx light."

So yeah, no loss in losing it so long as you keep an eye on your oil pressure gauge.

[Marf]

But, and forgive me if I'm being dumb, but to use an analogy:

If the oil is flowing round like cars on a busy street, let the hose be a dead end alley, once a few cars goes down the dead end alley, the first car in will have no chance of getting back onto the main street, so my sensor will always be sampling the same car?!

You're over thinking it.

Look at a MAP sensor. Its a pressure sensor. It does not need "flow" to measure pressure.

[Shmed]

That penny has dropped again.....

I could use the splitter for the 2 pressure sensors as, like you say, the reading will be fine because loss of pressure in the system will be apparent at all parts of the system.

Still think the oil temp sensor should be somewhere where oil can flow though.

[simpson_eh]

i had a braided line with oil temp sensor on it and 2 pressure sensors, pressure sensors work fine but you will never get a decent reading off the oil temp due like you said end of line no circ plus you get the cooling effect of the air coming from underneath the car across the braid.

i purchased a metal block that screwed into the braid no worries about it snapping then.

think i still got it somewhere if you want a pic

[Shmed]

Why not, pics are always nice

From what I have gathered, I need a braid with a male 1/8 NPT on each end, an adapter plate with 3 x 1/8 NPT holes.

Although (and again overthinking....) I've read that the head might actually be 1/8 BST, although NPT fit......

[Shmed]

So, I've ordered a 4-AN hose from Earls with 4-AN to 1/8NSP adapters, just need the distribution block:

do you think this will work?

http://www.hosefit.co.uk/catalog/produc ... cts_id=440

Pressure sensors don't protrude too far into the system do they?

[Shmed]

Hey, get off my thread

I've changed my order to this

http://www.demon-tweeks.co.uk/Product.d ... Motorsport

as it seems to tick all the boxes.

[Steve Horrocks]

If the stock sensor is anything like the sensors found on other Jap motors, it'll trigger the warning light at around 0.5 bar.

With that in mind the oil pressure warning light is more of a "you're engine is xxxxx light."

So yeah, no loss in losing it so long as you keep an eye on your oil pressure gauge.

Iirc, I think the light comes on at around 3-4psi!! But there's every chance that info was wrong!!

I've also got a braided T-piece that I need to get rid of as well. PM if anyone is interested. Oh, and an oil pressure sensor & gauge (nothing fancy, but kept an eye on things for me!!)