11 40 000 Checking engine oil pressure (N55)

Special tools required:

11 6 410
11 9 240
11 9 250
13 6 051
2 212 823
11 4 310

IMPORTANT: The regulated oil pump can only be checked and measured with the diagnosis system.
Vehicles with a regulated oil pump have a HYDRAULIC VALVE fitted.
Diagnosis path:

DME Digital Motor Electronics
Complete vehicle
Power train
Engine electronics
Engine oil
Oil-pressure control

Special tool 11 9 250 must be converted for N55

Necessary preliminary tasks:

Connect BMW diagnosis system to vehicle.
Observe diagnosis instructions.
Protect drive belt against dirt
Have a cleaning cloth ready to catch escaping oil

Secure special tool 11 9 250 at hexagon head in a vice.

Release insert (2) using a slotted screwdriver (1) in direction of arrow.

Fig 1: Securing Special Tool 11 9 250 At Hexagon Head In Vice

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Release screw piece (1) on special tool 11 6 410 .

Fig 2: Releasing Screw Piece On Special Tool 11 6 410

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Install special tool 11 6 410 in special tool 11 9 250 .

Insert central bolt with a slotted screwdriver (1) hand-tight.

Fig 3: Installing Special Tool 11 6 410 In Special Tool 11 9 250

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Insert screw piece (1) hand-tight in direction of arrow on special tool 11 6 410 .

Fig 4: Inserting Screw Piece Hand-Tight

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Release oil filter cover with special tool 11 9 240 .

Tightening torque: 11 42 1 AZ .

Fig 5: Releasing Oil Filter Cover Using Special Tool 11 9 240

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Carefully detach filter element.

Installation note:

Check all O-rings for damage, replace if necessary.

Fig 6: Checking O-Rings For Damage

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Install filter element (1) in special tool 11 9 250 .

Installation note:

Coat O-ring with engine oil.

Fig 7: Installing Filter Element In Special Tool 11 9 250

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BMW Order number for special tool: Bolt 2 212 823 with 11 4 310.

Screw the pressure sensor (1) hand tight.

Apply light coating of oil to sealing ring at pressure sensor (1) 100 bar.

Fig 8: Applying Light Coating Of Oil To Sealing Ring At Pressure Sensor

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Measure the engine oil pressure with diagnosis system.

BMW Order number for special tool, Screw to oil filter housing: 2 212 823.

Special tool 11 4 310 on special tool, order number: 2 212 823.

Screw in pressure sensor (1) 100 bar at special tool 11 4 310 (finger-tight).

Connect cable (2) of IMIB (Integrated

Measurement Interface Box) to pressure sensor (1) 100 bar.

Graphic N20.

Fig 9: Measuring Engine Oil Pressure

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Start engine and check engine oil pressure by means of diagnosis.