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2kg/cm3 Oil Pressure

locky

By locky,
in General Maintenance

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RellikZephyr Proficient

RellikZephyr

Posted
Posted
hi everyone

I have been reading the posts about oil pressure. I have a r32 gts4 and it has only got 2kg/cm3 of oil pressure when it is cold and stays the same when I rev it. checked this with a mechanical gauge. is it possible to be anything else other than the oil pump.

thanks locky

i have exactly same thing. but havent checked with mechanical. going off stock guage

car is r32 gtr

RellikZephyr

Beer Baron Grand Master

Beer Baron

Posted
Posted

firstly don't worry too much about cold readings. do the tests when the oil is over 80 degrees. for info, a healthy 32 GTR will be just above 2kg at idle and should be around 6kg when cruising at 3000rpm.

Omurru Veteran

Omurru

Posted
Posted
i had a problem with my car but it wasnt the exact symptons to what you are having and it ended up being a broken oil pressure release valve in the collar. hope that helps.

where's that?

I have the exact same problem as well, am working on it at the moment but freekin everything here is closed so i can't get the fitting i need. Mine goes up to 4 on startup then hovers around 2 while driving, regardless of rpm, engine runs fine though no probs, i'm hoping when i hook up an external gauge it'll read properley then can be narrowed down to either dash gauge or sender.....

Toasty Enthusiast

Toasty

Posted
Posted
where's that?

I have the exact same problem as well, am working on it at the moment but freekin everything here is closed so i can't get the fitting i need. Mine goes up to 4 on startup then hovers around 2 while driving, regardless of rpm, engine runs fine though no probs, i'm hoping when i hook up an external gauge it'll read properley then can be narrowed down to either dash gauge or sender.....

i dont know. its what my mechanic told me.

nizmokid Mentor

nizmokid

Posted
Posted
firstly don't worry too much about cold readings. do the tests when the oil is over 80 degrees. for info, a healthy 32 GTR will be just above 2kg at idle and should be around 6kg when cruising at 3000rpm.

Hi Beer Baron, what would be the reading on a healthy R33 Gtst?

Beer Baron Grand Master

Beer Baron

Posted
Posted
Hi Beer Baron, what would be the reading on a healthy R33 Gtst?

it's very similar. between 1 and 2 and idle and between 4-6 at 3000rpm cruising. all at operating temp of course. in my experience the stock gauge has been fairly accurate, just very slow reacting. my defi BF moves around as fast as a tacho! the stock one just slowly creeps around.

vhs2 Collaborator

vhs2

Posted
Posted
cheers guys have decided to put a new motor in as compression all over the place and turbo is on its way out. the oil pressure still doesn't move above 2 at any rpm

hey my r34 non turbo sits at 6-7 at cold start and in normal running conditions its sitrs between 4-5..and wen the revs goes higher it hits 7max..is that normal

Omurru Veteran

Omurru

Posted
Posted

Ok just for you guys info. Got an external gauge hooked up today and just tested the pressure staticly neutral revving it. got the following readings:

At start approx 50psi then drops down to 22-26 at idle.

2000rpm - 43psi

3000rpm - 60psi

4000rpm - 71psi

5000-8000psi - between 70-80psi

If you want kg/cm3 divide by 14.2

Now I been told you want approx 10psi per 1000rpm and thats something to aim for with any engine of any age? now i am getting more like 20psi per 1000rpm dunno if this is just because it's under no load or its a turbo engine or what. Any ideas anyone. So guess i will be off to the nissan dealer tomorrow to try and get a new pressure sender and maybe a dash gauge if that doesn't work.

Also just for the info the oil pressure relief valve on an RB26 and I am assuming all Rb engines is on the bottom of the oil pump and its a sump of job to get to....

GreddyGo Rising Star

GreddyGo

Posted
Posted

Yours does seem pretty high!

Especially as you rev higher, Oil pressure isn't supposed to climb that high when reving a car, that's what the relief valve controls.

I would definitely start checking it out. You might start popping seals etc.

-Josh

Omurru Veteran

Omurru

Posted
Posted

lol it's not high dude, infact it's pretty spot on.....5.6kg/cm3 at 8000rpm. it just seems to climb fast and then level of, I suppose thats not such a bad thing really. although it's an n1 pump so it does flow more. Will be interesting to see if it comes up with similar figures under load.

Anybody know when the relief valve opens?

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