Oil Pressure

[R32_Bob]

Hi guys,

this is my first post so forgive me if its in the wrong section. I've recently purchased a Fully stock 93 R32 GTR and wondered what sort of oil pressure i should expect as it seems a little low, also the car is pretty sluggish and unresponsive until it reaches higher revs before it warms up, is this normal? Apart from this it drives like a dream, no obvious issues elsewhere, are the problems related? When the engine starts it'll sit about the 2-3 (out of a max of 8) mark but settles lower after a few mins!

Any feedback is appreciated!

Thanks!

[N1GTR]

Yeah a lot of the oil senders are broken with time

Worry when the red light comes on

In the meantime you can get a mechanical guage hooked up for peace of mind

Keep the revs down (and dont use heaps of throtle) before the oil gets to the first notch on the middle dials

[djr81]

The reason the car will feel sluggish is the ECU dragging ignition advance out of the engine when it is cold. It is trying to tell you not to hammer the poor thing until it gets warm!

Replacing the sender unit is neither hard, nor particularly expensive. Order a new one up from Nissan & install it on your next oil change. $200 should see you right. From expereince it doesn't matter how many times you tell yourself not to worry about the pressure you still cant get it out of your head.

[Dohmar]

The reason the car will feel sluggish is the ECU dragging ignition advance out of the engine when it is cold. It is trying to tell you not to hammer the poor thing until it gets warm!

Replacing the sender unit is neither hard, nor particularly expensive. Order a new one up from Nissan & install it on your next oil change. $200 should see you right. From expereince it doesn't matter how many times you tell yourself not to worry about the pressure you still cant get it out of your head.

My mechanic says that when cold, the gauge will reflect twice the relative value of engine rev. aka 2k rev = 4k oil pressure, 4k rev= 8k pressure... oil pressure being kilogram per cm^2. aka 4kg per centimetre ^2 = normal for 2000 revs.... course, this depends totally on ur oil, the gauge and the position of the sensor. seriously if u got a gauge like that, it means stuff all without taking into consideration the oil, the oil temp and how old the oil is, how much you've warmed yr baby up etc....

And engines aint engines... cars always feel sluggish for at least 10 minutes as the ECU purposely restricts the ratio. even when u floor the accelerator, the ecu will limit the fuel/air... thats its job.course u can override it, but is it wise? Best to let it at least warm up for 15 mins before even cranking it over 6k. Thats my opinion anyhow, tho im no mechanic. But im superstitious and sometimes when I fang the car and nurse it, it comes to me, it comes to me in my dreams and says "Oh u PIMP, i LOVE u, pls for to be pimpin me some more"

...

And so I do

-D

[jenkies]

THIS IS A HUGE ISSUE hope i diddnt miss read ur post but hell man i just bought my gtr a couple months back i start it let it sit for 5 minutes before i budge it then i keep it under three for the next 10 minutes.... call me over careful but these engines cos a bit to fix when mistreated! most damage caused to all engines is when its cold let alone turbo ones so baby it untill oil and water hits running temp. and always puppy it before u get home and let it idle down for a couple minutes when u get home. owning a gtr is a big responsability especially one as old as an r32.

as far as your question my oil pressure guage reads similar.

good luck and safe driving

[blind_elk]

THIS IS A HUGE ISSUE hope i diddnt miss read ur post but hell man i just bought my gtr a couple months back i start it let it sit for 5 minutes before i budge

This is THE WORST treatment for a modern engine. Excess fuel thins the oil, washes oil from the cylinder walls. The spark plugs run cold and carbon up.

Just fire it up and get moving ... GENTLY (under 3k), until the engine shows a reasonable temp on the gauge.

it then i keep it under three for the next 10 minutes.... call me over careful but these engines cos a bit to fix when mistreated! most damage caused to all engines is when its cold let alone turbo ones so baby it untill oil and water hits running temp. and always puppy it before u get home and let it idle down for a couple minutes when u get home. owning a gtr is a big responsability especially one as old as an r32.

as far as your question my oil pressure guage reads similar.

good luck and safe driving

[NRV155]

Im having this problem with my GTST. I hope its just the gauge.

[blind_elk]

It may also depend on the type, grade, quality and age of the oil being used.

I just did an oil change to Mobil1 5W-50 SuperSyn. Cold start shows around 6. Cruise, it will sit all day at 4. Might drop a bit at idle (maybe 2).

(This is a RB25DET)

[Merli]

THIS IS A HUGE ISSUE hope i diddnt miss read ur post but hell man i just bought my gtr a couple months back i start it let it sit for 5 minutes before i budge it then i keep it under three for the next 10 minutes....

This is HORRIBLE advice.

Get the thing moving as soon as you get it started. It'll warm up the oil and water a lot faster, and also warm up the oil in your gearbox and differentials. Keep it under 4000-ish rpm until it reaches normal operating temperature.

[Gtrgodzilla67]

This is THE WORST treatment for a modern engine. Excess fuel thins the oil, washes oil from the cylinder walls. The spark plugs run cold and carbon up.

Just fire it up and get moving ... GENTLY (under 3k), until the engine shows a reasonable temp on the gauge.

hahaha so right agreed man

[Pezhead]

I was concerned 'bout the pressure on my R33 GTR. It never went above 4.5 and sometimes dips under 1 bar

So I bought a cheap AutoGauge pressure gauge to keep an eye on it. It was the stock gauge in my case. Around 2 Bar both read about the same. But above 3-4 the AutoGauge keeps climing to 6-6.5 where the stock one stops at about 4.5. Also on days when it drops below one the autogauge still reads 2+. On those days the stock gauge never goes above 2.5 but the AutoGauge still reads ok all the way to 6.5. I have no idea why some days the stock gauge does that and other days its ok.

Personally, I have too much invested in my car to have it malfunction due to oil issues. Oil problems are a definite way to stuff the motor.

Well, at least I have peace of mind now. If ur interested I bought the AutoGauge smoke face 52mm for $27 + 6 shipping to Sydney from an online shop (PM if you want the details). I was doing an oil cooler and remote at the same time so I didn't have to really fuss with a special adapter for the oil pressure sender unit.

Edited February 25, 2008 by Pezhead

[(OO)SKYLINE(OO)]

Shouldn't the Oil Pressure gauge be quite high on start up? Its gota get the oil pumping through the system and after warm up the pressure drops.

djr81 Thats quite interesting on what you said, I never new that.

Edited February 25, 2008 by (00)SKYLINE(00)