[Ian UK]

Hello, im not sure if the oil pressure is normal when i start the car cold oil temp. 8C it reaches to 119-123psi that seems really high and it sits arround 42psi at idle when warm 100C also in 1st gear pull its going up arround 112psi even when warm.
Also all gears pulls from 2nd gear showing 81psi oil pressure max.
im using Shell Helix HX8 ECT 5W-40 BMW LL04 and Mann oil filter i noticed leak from area where transmission and engine are connected rear main crank shaft seal or oil pan maybe.
So can some one tell me what are the correct oil pressures for these conditions and if its normal please?
Engine N55B30A.
Mods: Mishimoto race radiator, bms intake, Vargas turbo rad. hose, Stage 1 MHD OTS tune, AC delete.
Also guys if you share yours oil pressures in these or similar conditions i would greatly appreciate.

Thank you.

[suprf80]

Any update on this issue? My son’s E90 N55 started having same issue recently. Replaced pressure sensor, and also replaced oil cooler lines as well (small leak on return). PSI from MHD shows over 120. Drained and flushed oil, refilled with Castrol euro 5w-40. Still reads high.

[shmigzy]

Been having this problem with my 2011 e92 335 for as long as I can remember. My friend works at BMW and brought my cars service history. Found it had its oil cooler radiator and thermostat removed and Cylinder 4 replaced? But anyway here's this to look at. If anyone has ideas

2011 e92 335xi (96000 miles)
Stage 2 MHD
VRSF charge pipe
VRSF intercooler
VRSF cat-less downpipe
Injen cold air intake
5w30 liquimolly
New valve cover installed at 86000
In the last month I've replaced: oil pressure sensor: oil pressure control valve: both vanos solenoids and done an oil change.

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During cold start (after engine has completely cooled down over long period) engine oil pressure stays around 110-115 PSI, after warming up past 105 degrees, pressure drops down to normal which is around 40-75. Whilst driving under 220 degrees oil temp oil pressures remain good and normal around 40-80 and no smoke, Once engine oil is above 220 degrees and under 30 MPH car smokes and oil pressure is above 110, once above 30 MPH oil pressure drops to normal pressures and if smoke is present it will go away. I looked under my car recently and found my turbo seal is blown as a result I think of the high oil pressure. Been losing my mind trying to figure it out because I don't want to bring it to bmw and have my pockets swept. Anyone have ideas?

[wheela]

Here's my stock n55 oil pressure map. It adjusts based on rpm and temp (not sure if it's oil temp or water temp, but you can see the trend). Pressure here is in hPa (hecto-Pascals) so you need to convert to psi.

[bm333]

I am replying to this because I just found I have the same issue. My car seems fine otherwise but as you described on a cold start it’s oil pressure sits at 115psi. Then once the oil gets above a certain temp like 100F it will drop to a regular pressure of about 40-50psi. Then on 1st gear pulls or 2nd gears pulls if the revs are low the oil pressure will go all the way back up to 115psi for a second then go down to 70-80psi once I get higher in revs. I don’t know what the cause is and I wanted to open this back up if anyone has found a solution?

[Kennybruv]

im also having the exact same "issue" im starting to wonder if its normal?? 2011 335Xdrive

[Malteser_wfj]

Number 11

https://www.realoem.com/bmw/enUS/sho...diagId=11_4447

[Ian UK]

Well, didnt really find out much about this but N55 have simplified/upgraded oiling system looks like as long as you dong have an error code for oil pressure too high you should be fine but it is worth to try just send an email to bmw dealer if they can confirm the oil pressures. Right now im running castrol 5w30M.
Here is my youtube channel checkout my shorts i have some cold starts and hard pulls logs. https://www.youtube.com/channel/UCZY...vcIGnq1ofw2z_Q

[Malteser_wfj]

Change the control valve which I linked above and it should solve it.

I was getting high oil pressure codes and changed that AND the sensor and it fixed it completely.

[Kennybruv]

Originally Posted by Malteser_wfj

Change the control valve which I linked above and it should solve it.

I was getting high oil pressure codes and changed that AND the sensor and it fixed it completely.

I don't have any type of codes, only thing I have a concern with right now is a rough idle and when trying to park my surges and jerks, oil is also coming out of my oil cap not sure if it's related. I only noticed the high oil pressure when I was logging on MHD and thought it was super high. I just changed my Oil pressure sensor with 2 different brands and I'm still getting high pressure around 2500-4k rpm's.

[Kennybruv]

I wonder if it's still worth with no codes to replace the hydraulic valve??

[Malteser_wfj]

Originally Posted by Kennybruv

I don't have any type of codes, only thing I have a concern with right now is a rough idle and when trying to park my surges and jerks, oil is also coming out of my oil cap not sure if it's related. I only noticed the high oil pressure when I was logging on MHD and thought it was super high. I just changed my Oil pressure sensor with 2 different brands and I'm still getting high pressure around 2500-4k rpm's.

If you've changed the sensor and it hasn't changed anything then that points towards the fact you should try something else

[Kennybruv]

Originally Posted by Malteser_wfj

If you've changed the sensor and it hasn't changed anything then that points towards the fact you should try something else

Point was being it's possibly not an issue.

[anjuna]

for anyone searching later

This is not an issue and always occurs on cold start.