E46Fanatics - View Single Post - Red Oil Pressure Light
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Old 01-28-2013, 07:12 AM   #36
Registered User
Join Date: Jan 2013
Location: Romania
Posts: 1
My Ride: Bmw 320i e46 2.2
I own a BMW e46 from 2003 with M54B22 engine with 90k milles and i have the same problem. Low oil pressure at hot idle. Since then i changed the oil pressure sensor, oil, filter, filter hausing, oil pump, main and rod bearings(machined the crankshaft at the correct spec for the bearings), pressure reliefe valve in oil pump, lower part of engine gastets kit, oil separator,oil squirters(all 6 of them.....the spring in 3 of them was weekl) but the problem still persist. The pressure was mesured with a gauge every time and the readings are around 0.4 bar at hot idle (idle is around 700 rpm). At 1000 RPM the pressure increases very fast, around 1 bar and so on.....at high RPM reaches the maximum spec 4 bar. At cold idle(when i first start the car) the pressure is around 1.1 - 1.2 bar. I also did the VANOS seals from beysan systems with no improvement. The engine temperature is normal....no overheating and starts and runs fine, the idle is rock solid...
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