Hi, can someone help me with oil pressure drops in my M10 engine?
E30 318i, some suspension mods, coilovers, poly bushings, nothing extra.
Engine is stock M10B18, running great, 2 years after rebuilt, no oil consuption etc. Oil pump was checked last summer, some wear was visible, but no scratches or bigger damage.
Only one mod is oil cooler with sandwitch plate with thermostat under the oil filter. Oil cooler is mounted between valance and radiator, in/out is upwards, so when I turn off engine, oil should stay in cooler...
I also have oil temp and oil pressure gauges. Temp and pressure senders are in sandwitch plate.
Now the problem.
First part
When car is parked on flat surface and I coldstart the engine, oil light come off immediately, but I can see how needle in oil pressure gauge flapping around 2 - 5 bar, this happening for about 30 seconds or if I increase rpms to 1500, needle stay at 5 bar and everything seems okay.
If I park the car on the hill with front end down and coldstart the engine, oil pressure immediately jump to 5 bar a stay there.
And second part.
If I enter right-hand corner in higher speed (yes, right-hand, not left-hand corner - I know BMW engines have/had problems with oil starvation in left-hand corners due to engine position/tilt) my pressure drop once or two times from 5 to 3 bar, when I exit the corner and going straight, everything looks normal. In left-hand corners there is no problem...
I had and idea of relocation the pressure sender from sandwitch plate into the head, where is the stock pressure switch, but oil pressure in sandwitch plate should be more accurate than in head, true?
Thanks for help and sorry for my english.
E30 318i, some suspension mods, coilovers, poly bushings, nothing extra.
Engine is stock M10B18, running great, 2 years after rebuilt, no oil consuption etc. Oil pump was checked last summer, some wear was visible, but no scratches or bigger damage.
Only one mod is oil cooler with sandwitch plate with thermostat under the oil filter. Oil cooler is mounted between valance and radiator, in/out is upwards, so when I turn off engine, oil should stay in cooler...
I also have oil temp and oil pressure gauges. Temp and pressure senders are in sandwitch plate.
Now the problem.
First part
When car is parked on flat surface and I coldstart the engine, oil light come off immediately, but I can see how needle in oil pressure gauge flapping around 2 - 5 bar, this happening for about 30 seconds or if I increase rpms to 1500, needle stay at 5 bar and everything seems okay.
If I park the car on the hill with front end down and coldstart the engine, oil pressure immediately jump to 5 bar a stay there.
And second part.
If I enter right-hand corner in higher speed (yes, right-hand, not left-hand corner - I know BMW engines have/had problems with oil starvation in left-hand corners due to engine position/tilt) my pressure drop once or two times from 5 to 3 bar, when I exit the corner and going straight, everything looks normal. In left-hand corners there is no problem...
I had and idea of relocation the pressure sender from sandwitch plate into the head, where is the stock pressure switch, but oil pressure in sandwitch plate should be more accurate than in head, true?
Thanks for help and sorry for my english.
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