Oil pressure has raised suddenly, why??

[ELORTO]

Hello.

My car meets stage 3a requirements, let say GT28Rs.86 , Tomei Poncams, etc, etc.

I must say my turbo has been screaming like a "beach" at 0.5 bar and up , since I purchased it (Brand new). Last weekend I was performing some launches under our new "cool" cold weather, let say 12ºC. After 3 launches at 1,35 bar my turbo seemed to have stopped screaming , weird. Then I checked my forge dump valve and swapped it with the bailey one.

Then boost raised and I had to turn boost controller down a bit.

Problem is that oil pressure has raised last morning. Gauge reads 40 psi at hot idle when it used to be 20 psi. Car pulls strong,even higher boost than it was when turbo screamed a lot. So I am confused whether this sudden high oil pressure is due any internal damage or gauge failure.

Also I changed oil and filter just before all this issue begining.

Any idea?

Thx

[kinglewy]

hmmm strange

[baz f]

maybe you had a blockage in a oil way an cleared it out

[s14@jim]

40psi at tickover when hot seems very high to me, don't know what would cause it though.

[frisbee]

I wouldn't rule out failure of the oil pressure sensor. If its a one wire sensor check that it is earthed.

[4leafclover]

maybe you put in to much oil??

[Maddog]

Sticking oil pressure relief valve could cause too high a pressure, the spring is set to open and allow the excess pressure to be relieved thus giving you your required pressure. I've had it occur a couple of times mostly on subaru's though!

[Mark]

Sticking oil pressure relief valve could cause too high a pressure, the spring is set to open and allow the excess pressure to be relieved thus giving you your required pressure. I've had it occur a couple of times mostly on subaru's though!

That will only happen at the peak oil pressure, not at tick over.

What grade oil you using? is it the same as what was in there before?

[Chaz]

Would I be right in saying your oil pressure should never be zero when the engine is running? Sorry for the hi-jack ...

[Mark]

Would I be right in saying your oil pressure should never be zero when the engine is running? Sorry for the hi-jack ...

Yes shouldnt really be below 10psi at tickover

[Maddog]

That will only happen at the peak oil pressure, not at tick over.

What grade oil you using? is it the same as what was in there before?

Not entirely true!

I had a wrx here recently that was blowing it's oil filter at idle

the boy changed his oil+filters plug's etc when he fired it up afterwards it blew the filter right off, he then tried another filter same thing, went and got a genuine subaru filter same thing happened, brought it to me i checked the threads and oil-filter seals, took it to bit's and found the pressure relief spring was sticking. The other two occasions were on one's that had sat for a year and 18 months respectively.

[Maddog]

Would I be right in saying your oil pressure should never be zero when the engine is running? Sorry for the hi-jack ...

When an engine is running unless the pump has failed or you have a gaping hole on the block you will register oil pressure. If it's a guage that is reading zero then i'd do some check's to make sure oil is getting to the top of your engine, then check the gauge.

[Chaz]

Yes shouldnt really be below 10psi at tickover

When an engine is running unless the pump has failed or you have a gaping hole on the block you will register oil pressure. If it's a guage that is reading zero then i'd do some check's to make sure oil is getting to the top of your engine, then check the gauge.

Thanks for the info. It's not me, I don't have an oil pressure gauge (yet ) just one of my mates said it should only read at ignition and then drop to zero ... I wasn't sure so thought I'd check with the knowledge centre that is the

[Maddog]

Thanks for the info. It's not me, I don't have an oil pressure gauge (yet ) just one of my mates said it should only read at ignition and then drop to zero ... I wasn't sure so thought I'd check with the knowledge centre that is the

alway's best to check, before getting into a flap, personally i get into an awful guddle before i ask

[Mark]

Not entirely true!

I had a wrx here recently that was blowing it's oil filter at idle

the boy changed his oil+filters plug's etc when he fired it up afterwards it blew the filter right off, he then tried another filter same thing, went and got a genuine subaru filter same thing happened, brought it to me i checked the threads and oil-filter seals, took it to bit's and found the pressure relief spring was sticking. The other two occasions were on one's that had sat for a year and 18 months respectively.

Are we talking oil pump or filter housing

Do scoobies run a canister filter

i have never ever heard of an oil filter blowing off

[Maddog]

Are we talking oil pump or filter housing

Do scoobies run a canister filter

i have never ever heard of an oil filter blowing off

I've mis-informed, sorry!

Right the seals on top of the filters were being blown out of them, i was checking the threads as i suspected that somehow it had been crossthreaded and not sealing properly, which in turn would have allowed the seal movement.
They are just run of the mill screw on cannister filter's.

[Mark]

The pressure relief valve only works when the pressure reaches its set max, this will not cause the pressure to rise from 20psi to 40psi at hot idle

Things that will are

Thicker oil
Higher idle rpm
A blockage in the lub system
Faulty Gauge

[cHiL]

My oil pressure is always around 40psi at idle (950'ish rpm) when warmed up. I dont see a problem in that.

[Maddog]

Stripped and cleaned it worked right away, no problems.
the relief valve was sticking closed.

[Mark]

Stripped and cleaned it worked right away, no problems.
the relief valve was sticking closed.

Yes but the engine was cold so oil pressure is at its max i would also assume he was using a thick oil like 15w50