Use the dipstick tube to manually prime the system with fresh oil until resistance is felt. On the 2011 X5 35d, the pump is driven directly off the front of the crankshaft via a shaft with splines.
2011 BMW X5 35D Oil Pump Removal Precautions: Draining Coolant and Priming Tips
This dual-step reduces the mess and pressure when you finally unbolt the oil pan and expose the pump mounting bolts. Here, the complexity increases.
Draining the Cooling System and Oil Before touching the oil pump, you must lower the coolant level. A steady reading within the normal range confirms a successful repair and eliminates air pockets from the VANOS system.
2011 BMW X5 35D Oil Pump Removal Precautions: Draining Coolant and Oil First
This prevents the dry start that can damage the ceramic bearings in the new pump. The expansion tank on the N54 is translucent; drain coolant into a suitable container until the level is below the bottom hose connection.
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