Hallo zusammen,
ich bin über ein paar Berichte gestolpert, in denen es heißt:
Nach dem Tausch der Dichtungen für das Ölfiltergehäuse und Ölkühler beim N55 E90 wird zwingend empfohlen, dass beim ersten Motorstart das Öl vorbereitet werden muss (oil supply circuit priming procedure).
Gibt es hierzu irgendwelche Erklärungen, warum das gemacht werden muss? Mich würde vorallem der Unterschied zu einem Ölwechsel interessieren.
Auszug BMW SI B11 09 15
After replacing the engine or making engine repairs that require the replacement or removal of the engine
bearings, VANOS gears, camshafts, bed plate resealing, engine oil pump, engine oil filter housing, cylinder
head, engine oil cooler or anything that interrupts the engine oil supply circuit of the engine requires a short oil
pump and oil supply circuit priming procedure.
Engine Repairs:
This procedure is used when the high pressure fuel system pressure is not depleted after minor engine repairs
and the fuel injection system needs to be disabled by removing the fuel injector electrical connectors.
1. If the engine has been drained prior to the repair remove the engine oil drain plug again to remove any
residual oil that may have settled in the engine oil pan during the repair if the engine oil pan was not
removed entirely.
2. Reinstall and torque the engine oil drain plug (with a new seal ring) per the applicable repair instruction.
3. Remove the oil filter housing cover and verify the oil filter is present. Reinstall the oil filter housing cover
and torque it to the proper specification noted in the applicable repair instruction.
4. Fill the engine with the proper type and amount of engine oil, as specified in the applicable repair
instruction.
5. Connect a battery charger to the vehicle.
6. Remove all fuel injector electrical connectors to disable fuel injection.
7. Crank the engine for 10 seconds.
8. After 10 seconds have elapsed, stop the starter, and allow the starter to cool for 20 seconds.
9. Repeat steps 7 and 8 two additional times.
10. Reinstall the fuel injector electrical connectors, reassemble the vehicle and verify proper engine
operation.
11. After the engine has reached operating temperature, check the engine oil electronically or with the
dipstick, and top up the engine oil as needed.