Normal Oil Pressure For An R33 Gtr(rb26dett)

[R33-RB26DETT]

Hi Guys,

I am fairly meticulous when it comes to servicing my car, and i am interested whether my oil pressure is normal?

When i first start up its high, like around 6 -7 on the stock gauge(my friend with a GTST said that's good for some reason?? ).

Then it drops fairly quickly and around five or ten minutes after the engine heats up its stabilizes around 2 on the stock gauge.

1. Is this a normal level for when the engine is nice and warm?

2. Is it normal for the oil pressure to increase as you are giving it a bit of throttle, i assume so since more internal pressure is being built up?

Edited October 6, 2008 by GTR-PWR

[abu]

When I start mine when cold its almost at 8, pretty much half way between the second last mark and 8. Not to sure what it sits at when idling at operating temp but when cruising it sits either just under the '4' mark or over, depending on what revs your doing

It rises up when you give it more, it's normal for it to increase as the revs increase

[R33-RB26DETT]

Thanks, still confused as to what is an officially 'unsafe' oil pressure?

i.e in which specific situation, whether your engine is hot or cold, and if you are under engine load etc should you be worried?

Is there a general rule of thumb? Like if your oil pressure gets below ___ when your engine is warm to hot then you take it easy...

[bubba]

I don't put much faith in the stock gauge.

But if that red line comes on at any stage other than pre-start up, I'd be VERY worried

[(OO)SKYLINE(OO)]

My understanding is that the oil pressure is high on start up.

As the car warms up the pressure lowers then at normal engine temp, it sits low.

Normal city driving, its normal for the oil pressure to be low and while freeway driving its just above low.

Also while your car is warmed up and idling, give it a few revs and watch to see if the oil pressure gauge goes up and down.

BTW the factory Nissan gauges are not as accurate as it should be and best to install an aftermarket oil pressure gauge to give a more accurate reading.

[SiR_RB]

spot on as mine (r33 gtst) on about 8 when cold, and just abit under 4 when crusing. even when idling it still sits above 2

When I start mine when cold its almost at 8, pretty much half way between the second last mark and 8. Not to sure what it sits at when idling at operating temp but when cruising it sits either just under the '4' mark or over, depending on what revs your doing

It rises up when you give it more, it's normal for it to increase as the revs increase

[bubba]

+1 for aftermarket gauge, preferably electronic.

And yes, pressure will be high on cold start and decrease as temps increase.

[R33-RB26DETT]

Well its pretty safe to say that on a cold start high pressure close to 8 which then drops is NORMAL.

Although, generally assuming that stock gauges are accurate what would be acceptable safe level during a hot idle for an RB26DETT? - around 1 - 1.5?

Seems to me two things would attribute to oil pressure drop under normal circumstances:

1.The hotter the engine gets the lower the oil pressure drop (i.e thrasing on the track would see your oil level drop to around 1.5 on idle immediately after.)

2. Less load results in less oil pressure and vise versa. (As you tap your throttle you should see oil pressure move up and down in response slightly)

Possible Conclusions: That anywhere between 1 - 2 kg/cm^2 oil pressure on a hot engine on idle would be safe for an RB26DETT

Edited October 6, 2008 by GTR-PWR