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Scary Oil Pressure

XTRMTY

By XTRMTY,
in Engines & Forced Induction

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JonnoHR31 Grand Master

JonnoHR31

Posted
Posted
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.

your joking right, the leak was from the cam covers? by your logic you could plumb your oil pressure gauge into the pcv piping and it should be accurate.....

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DVS JEZ Grand Master

DVS JEZ

Posted
Posted
your joking right, the leak was from the cam covers? by your logic you could plumb your oil pressure gauge into the pcv piping and it should be accurate.....

Yeah my oil pressure gauge is in my catch can cause i didnt wanna drill into my rocker cover ;):)

blur Proficient

blur

Posted
Posted

As said earlier, the standard 32 oil gauge is just there for show unless you cough up the $170 odd for a new sender plus fitting. Lets face it, if the oil pressure was really that low, the engine would be dead..

XTRMTY Enthusiast

XTRMTY

Posted
  • Author
Posted
As said earlier, the standard 32 oil gauge is just there for show unless you cough up the $170 odd for a new sender plus fitting. Lets face it, if the oil pressure was really that low, the engine would be dead..

Thats what i was thinking i figured i would at least be able to hear some knocking or something.

Wednesday im going to hook up an aftermarket oil press gauge, i will let u know what happens. but for now i have to just hope its not the oil pump.

snozzle Mentor

snozzle

Posted
Posted
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.

lol..

XTRMTY Enthusiast

XTRMTY

Posted
  • Author
Posted

Mechanic finally got around to reading my oil pressure and it was the gauge playing up. :thumbsup::P:(:D Oil pressure is still a little bit low but nothing to worry about, i think its just because its due for an oil change. It has 10W40 thats a year old.

PM-R33 Grand Master

PM-R33

Posted
Posted (edited)

Yeah the factory oil pressure gauge is a bit hopeless sometimes. Mine goes down to zero every now and then. Always scares the shit out of me but I soon realise it's just the gauge being gay and after a bit of a bootful it returns to normal lol.

Edited by PM-R33
ClutchBurndout-:( Grand Master

ClutchBurndout-:(

Posted
Posted

i have only read the first page

this is normal, mine reads the same, sometimes double, guages are always faulty

when warm mine sits in the middle of the first section like ur image, then when running goes up, but hey maybe my oil pressure is to low lol

  • 3 weeks later...
  • 1 month later...
MJTru Mentor

MJTru

Posted
Posted

I've red this thred, and i own a r33 gtst with a n1 oil pump and i have the same problem, i use mobil one 15w-50 full synthetic oil.

Is this model of the skyline prone to a bad gauge as well? after a good beating the car oil pressure is midddle of 0-quarter mark. I'm thinking of dropping the crank changing out my acl bearings for new ones, change the oil pump to a greddy unit that i have. and while i'm at it, place a crank collar on the crankshaft for the new pump.

What is the recomembed oil pressure in psi at idle for a gtst, as i will check it with a manual gauge first?

PM-R33 Grand Master

PM-R33

Posted
Posted (edited)

Mine sits at like 30-50psi I think on idle depending on temp.

I'm looking at changing the pressure sender to something aftermarket so the gauge reads more accurately and also to hook up to the Vipec as an input so if it detects oil pressure to be too low to shut down the engine.

Edited by PM-R33
MJTru Mentor

MJTru

Posted
Posted
Mine sits at like 30-50psi I think on idle depending on temp.

I'm looking at changing the pressure sender to something aftermarket so the gauge reads more accurately and also to hook up to the Vipec as an input so if it detects oil pressure to be too low to shut down the engine.

has any thing changed are you running, a n1 oil pump? like i am.

I like you wheels mate, if you don't mind can you let me know the specs on them size name and type offset front and rear tyre size.

thanks looks like 10 j in the rear. I'm guessing that there s1's.

MJTru Mentor

MJTru

Posted
Posted
has any thing changed are you running, a n1 oil pump? like i am.

I like you wheels mate, if you don't mind can you let me know the specs on them size name and type offset front and rear tyre size.

thanks looks like 10 j in the rear. I'm guessing that there s1's.

Beer Baron Grand Master

Beer Baron

Posted
Posted

before you go changing oil pump and bearings and crank collar etc spend $200 on a quality oil pressure gauge and sensor. mount it, check it and see what is really happening with your cars oil pressure. the factory guages can be great, or they can be shithouse. but even when in tip top condition they are painfully slow to react (this is so normal drivers don't get scared by the rapid changes in oil pressure). buy a proper gauge and then decide if you really have a problem or not.

KrayzieGTR Contributor

KrayzieGTR

Posted
Posted

like a few others my guage show really low sometimes. i was just wondering what the pressure should be at while idling n driving on highways and such! after reading this thread im going to try get an aftermarket oil pressure guage today and check it all properly but i need to know what would be classed as a good pressure?? thanks guys

MJTru Mentor

MJTru

Posted
Posted (edited)

Ok guys I did it, I placed a 3way splitter where the original sending unit was on one end, I added -4 an adapter on the other end, I changed the oil and filter Mobil one 15w-50, I then started it up and, it went to 85 psi right away, after letting it idle for a while it sat at 65psi for a long time. At this point it wasn't too warm, so I took it for a ride at 26psi of boost, beat it a little, and then return home. The factory gauge was sitting just slightly under the quarter mark, and the analog gauge that I add was reading 40 psi. From what I read this should be fine.

It wasn't easy getting these fittings to fit. There is no room, and I found it easier to do it with the filter off, so that's why I just changed the oil. the gauge i added does have a faster response than the factory one. After i drive the car for a little while more, and the oil wears a little, and the factory gauage goes to half of the quarter mark, thats when i will let you know my findings. thats the test piont. nismo N1 oil pump is what i have.

thanks everyone for all your help.

Edited by MJTru

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