Oil Pressure issues

[Billman]

maybe your one way valve sits shut and when pressure rises it opens it and then it stays open like it should.

[Rikki Kitto]

I have problems with oil pressure from starting up it takes ages to build but if I give the throttle a little blip after a few seconds it is straight up to 5 bar? Any ideas

[A80Avant]

Today i was doing some fueling adjustments and had the car idling for a while, as it reached 85C on vems, and the fan was kicking in, the idle pressure had dropped to 1.1bar.

Now, the oil pump was cleaned and inspected, so its surelly not that. Oil used, is mineral 15W40 for the first 1000kms break in oil.

Funnily enough, the max pressure it reaches is between 4-4.5bar so im thinking the gauge sender is going nuts.

however seeing the gauge is always worrying..

[WabTheKing]

Never ever run Mobil 1 of any grade on a turbo car you may aswell put semi synth 10w40 in it. Mobil1 is complete cr4p.

I used it for years in Bentley GTC and 996 onward porsche turbos with no issues one gtc has now done nearly 150k

whats bad about it?

[Error404]

3B uses the same valve.

[rs200]

Here is a pic of I crushed valve and a replacement.

I know that AAN (probobly ABY , and ADU) have that valve.
but I have 3B block and I didn't sow that when I rebuilt the engine..

maybe they have.. I will check in etka.

[Billman]

It sits under the oil pressure check valve on the aby-adu engine and is screwed with a torx or something like this.

[Tonks4x4]

OMG...what is that?
do you have picture of it?
please..
or part number. thanks

Here is a pic of I crushed valve and a replacement.

[rs200]

Sorry, one way valve that sits under the pressure check valve in the block preventing the oil going back from the cylinder head to the block when the engine is shut off.

OMG...what is that?
do you have picture of it?
please..
or part number. thanks

[Billman]

Sorry, one way valve that sits under the pressure check valve in the block preventing the oil going back from the cylinder head to the block when the engine is shut off.

[Error404]

I would check it with a proper gauge, the OE ones are not accurate.

[rs200]

yes my friend I change 2 oil pressure sender. and 2 instrument closter.. everything is the same.
what is "wag valve" ?

NO I have stock main stubs .

[Billman]

Did you changed the oil pressure sender? Did you checked the one way valve on the block? If you fitted arp main studs maybe you crashed it and you see different number than you should.

[rs200]

well today same problem.. 1 bar at hot idle.
at monday I will go and buy new oil pump . I'm prepare to change part by part until I fix this problem.
maybe I'm mad but I wont pressure like it was before when I rebuilt the engine.
I find one picture before 3 years when my car at hot idle have 2bar of pressure and it have 10w-40 oil inside.
and I ordered today 10w-50 (Midland) oil for it.. so we will see.

what is funktion of oil filter gracket ? they have one little piston inside and little spring.. you know that part on engine.
what did they do and when?
TNX
Igor

[A80Avant]

hmmm that is interesting, as the 10W50 fuchs has 116@40C and 18.17@100C

im wondering if the synthetic properties have much to do with it,as the specs are not too far off. Unless the 14 to 18 is indeed a huge difference