MA240SX | Forums

coming in a few

Ok I just got around to installing a Oil Psi Gauge.. should actually be installed with any turbo/NA setup just for safety and monitoring . I was also having a over oiling issue with my new setup and this told me exactly how bad it was. now i have to add a oil restrictor to my setup...... this is also done on my turbo KA that already has a T present. if you don't have a T get one they are very cheap or just screw the sender into the block, but .. you can also get a + fitting also so that you can run you stock oil pressure sender along with everything else.

i went with an electric gauge becuase i don't like mechanical gauges and i don't fell like dealing with a oil leak inside my cabin if the ferrule is not clamped properly.

this is the first half "hard" part of the install, the second half of wiring/mounting the gauge can be done so many ways. so ill leave that up to you the installer. just follow the directions in the gauge manual..I am using a faze gauge, but they all are generally the same process.

Tools/Material Needed
Oil gauge
( if turbo) -3an to 1/8npt 90 degree fitting ( if you have -4an get the respective fitting)
Adjustable wrench
1/2 wrench
Teflon tape
wire cutters
18 gauge wire
electrical tape
9mm wrench/ratchet
oil pan
wire loom
soldering iron
(optional)small O ring electrical connections




1.Place oil pan right under oil filter location to catch the small amount of oil

2. remove oil filter and oil lines. also make sure the T looks somewhat like mine, this will give you clearance away from the oil filter and also allow you to easily hook up the sender wire.


3.place Teflon tape around threads in the direction of the thread pattern on both the 90deg fitting and Sender



4. Insert 90 deg fitting into T and hook oil lines up like so ( Note.. don't install it like this.. put the sender in the middle of the T facing down. I broke Three 1/8th npt fittings do to vibration and simple physics.)


5.you now will take a length of 18 gauge wire thats long enough to make it into you cabin.. you may route this how ever you want.. just make sure if you run it behind the motor that you add extra shielding to protect the wire. you can run it through the ecu section on the fire wall and or drill a hole in your fire wall like so for all you accessories. if you drill make sure you check both sides to ensure you are not drilling into anything



6. After you have run the wire hook it up like so inserting washer on first and then your wire with the ring style electrical connection provided.


7. Look at your manual to get wire hook up directions if you need it

8. Start car up and check for leaks and then look at your psi level for an stock 240 3000 rpm no load 60-70 PSI is standard. for many turbo setups you should be sitting at about 50 psi at idle you ideally wanna stay around 55 psi at 3000 rpms for many turbo setup. much more over that at 3000rpms and you will be probably be over oiling

Biggamehit Wrote:i went with an electric gauge becuase i don't like mechanical gauges and i don't fell like dealing with a oil leak inside my cabin if the ferrule is not clamped properly.

I would like to comment on this point. It's an excellent idea because pressure in the nylon tubing will not be accurate once it travels into the cabin.

Biggamehit Wrote:2. remove oil filter and oil lines. also make sure the T looks somewhat like mine, this will give you clearance away from the oil filter and also allow you to easily hook up the sender wire.

Can anyone comment on placement of the sender? Is this the ideal location?

ummm it's the oem spot. looks ghetto tho like that.

MURPHY Wrote:ummm it's the oem spot. looks ghetto tho like that.

As you know the OEM sensor triggers an oil light, and by the time the light is turned on the engine is already dead.

Again, is this the best place other than it being the OEM location?

ummm yea cause it's a dummy light. just cause stock one sucks ass doesn't mean the location does. i would have used a sandwich but whatev.

I was just curious why he chose that location. You know a lot of 240 owners are lazy and don't do it right. Biggame is thorough with his stuff though so if it's good enough for him, it's good enough for me.

All I have to say is that Nissan picked that spot for the sender for a reason.

SHIFT_drift Wrote:All I have to say is that Nissan picked that spot for the sender for a reason.

This argument has been used in the past and has generally not been found to be meritorious for 2 reasons:

1) Do you like everything that Nissan does?
2) http://en.wikipedia.org/wiki/Appeal_to_authority

Don't shoot me. I'm just the messenger. This is the rebuttal used against "Company X does something. Company X is good. Therefore, the something is good".

Unless you are a design engineer for Nissan, nobody knows why that location is used on Nissan.


If you can show that a lot of other cars use it then I still won't buy it for the same reason. If you can show that the location gives good reading or something like that, then I'll buy it.


My original question still stand: "what is the best location for an oil pressure sensor?"