Scary Oil Pressure

[XTRMTY]

Hi okay let me start from the start. The oil pressure gauge on my R32 GTR always read around 4. I changed my valve covers and they are leaking oil and now my oil pressure reads just above 0. Is this related or just coincidence? Im shiting myself because i had to drive the car for a fair bit with the gauge reading between 0 and 4.

Thanks Adam

[Moodles2]

Get an aftermarket oil pressure gauge in there asap

[XTRMTY]

well next stop is the mechanic i will get them to test the oil pressure and do a comp test

[XTRMTY]

[XTRMTY]

Would leaky valve covers cause this? I was told no but not from a reliable source

How can i tell if its a faulty gauge or a real engine problem?

Edited September 3, 2010 by XTRMTY

[yogibear]

std gauges are completey useless.

[snozzle]

no it will not cause a drop in oil pressure, oil pressure is measured inside the block oil galleries, any loss in oil after this point is not measured on the gauge but if u havent topped up the oil that u have lostt, if its alot, it will be the reason why ur oil pressure is so low as then the oil pump will be starving of oil

what is ur oil level on your dipstick with the car parked on even ground? i doubt uve leaked out that much though

it could just be a coincidence that ur oil pressure sender is dicking around - common problem

[XTRMTY]

I have been checking the oil like crazy lol and there is plenty. hopefully just a coincidence like u said.

[snozzle]

what year is ur car? the pre 1993 rb26 engines were prone to oil pump failure coz of the short oil pump drive on the crank collar

get another oil pressure gauge hooked up, dont bother with a compression test it will tell u nothing about ur current problem

[XTRMTY]

Its 1990. I think i have to check the oil pressure with a proper gauge

[DVS JEZ]

head to supercheap, even a cheap arse oil pressure gauge will be fine, the porblem is trying to get the sender to fit somewhere, if you have a filter relocater this will be easy, if not its gonna be a pain in the butt

[=premo=]

Use a mechanical gauge not electric as a poorly charge battery or low volts can make a bad reading. The stock oil gauge sender unit can be reached and replaced under the plenum just forward of and above the starter motor.

As someone said before when I first got my tomei oil pump I had the wrong spring pressure in it and I had too higher oil pressure but the stock gauge still read just bellow 4.

[yogibear]

example of how shit std gauges are, trun on car wait for it to warm up..... temp gauge is at normal , look at pfc hand controller it says 45c.... and then the temp raises to 82c witch is normal op temp ad gauge is still at the same point...

[yogibear]

so in other words unless u have a after market gauge and reader unit, i wouldn't go looking for any thing just go buy one and see where it takes u

[Hiroshima Screamer]

ive had the same with mine in the past , apparently the sender unit are prone to failure your best bet is getting an afm oil gauge.

[STATUS]

oil viscosity will change the oil pressure, did you change oil at the same time you did covers?

[paulr33]

also is the oil pressure idiot light on?

if the guage is showing like a low reading ie 1.0kgcm2 and the idiot light is on i would say its all over

but if its only the guage that is showing low then it might not be true game over

i would certainly stop driving the car, check the basics, check oil level and check with a different guage

[ARTZ]

,I have opposite problem, oil pressure is over 3/4 at start-up, then settles around 4 once warm..

Is this normal, could it be oil to thick? motul 8100

[mystery_kid]

no it will not cause a drop in oil pressure, oil pressure is measured inside the block oil galleries, any loss in oil after this point is not measured on the gauge but if u havent topped up the oil that u have lostt, if its alot, it will be the reason why ur oil pressure is so low as then the oil pump will be starving of oil

you're kind of right and kind of wrong there, fyi

the oil system is closed so it doesn't matter whether you take a reading on the pressure from the sensor in the block or from an aftermarket gauge that has it's sensor in an oil sandwhich plate between the block and oil filter, it should be exactly the same reading no matter where it's taken from

a leak will allow pressure to release from the whole system so it won't matter where you sensor is you will be able to see the change in pressure.

[Turbo Dave]

Oil pressure in my GTR sits lower than my GTS-T did under normal driving, still goes up the top when cold and when up the top of the rev range(5000+).

When Driving at 2900RPM on the highway mine sits just under the No.4 Mark.

Not sure if this is normal for GTR's or maybe has the same sort of principal as the N1 water pump that doesn't move alot of water at low speeds as it's meant for lower drag in high RPM application's.

Not sure if my car has a stock Oil Pump or of it's an upgraded unit that has a similar theory behind it.

I use Motul 300V Competition 15/50.