Replacing crankshaft main bearing shells

• Replace crankshaft main bearing shells (1) to (5) (with lubricating groove) in the crankcase.

  Parts  : Crankshaft main bearing shells

  NOTE: The axial guide bearing of the crankshaft is installed at bearing position (3).

  Courtesy of BMW OF NORTH AMERICA, INC.

• Make sure the crankshaft main bearing shell (1) is correctly installed with the guide lug in the highlighted area.

  Courtesy of BMW OF NORTH AMERICA, INC.

• Replace the crankshaft main bearing shells (1) to (5) (without lubricating groove) on the crankshaft bearing caps.

  Parts  : Crankshaft main bearing shells

  Courtesy of BMW OF NORTH AMERICA, INC.

• Make sure the crankshaft main bearing shell (1) is correctly installed with the guide lug in the highlighted area.

  Courtesy of BMW OF NORTH AMERICA, INC.

Follow-up work 

• Install the CRANKSHAFT  (B48 technical update 0/1).
• Check the crankshaft SIDE CLEARANCE .
• Check the crankshaft friction COEFFICIENT .
• Measure a CYLINDER .
• Measure PISTON .
• Install all PISTONS with connecting rod.
• Install the OIL DEFLECTOR .
• Prepare the OIL VACUUM PUMP
• Install the OIL VACUUM PUMP
• Install TIMING CHAIN .
• Install the rear timing case COVER .
• Refit engine OIL PAN .
• Install bearing BRACKET .
• Install front axle DIFFERENTIAL .
• Install the FLYWHEEL .
• Install the VIBRATION DAMPER .
• Install the oil pan ACOUSTIC COVER .
• Block the CRANKSHAFT in the TDC firing position of cylinder 1.
• Seal the OIL DUCT .
• Clean sealing SURFACES .
• Replace cylinder HEAD GASKET .
• Install the CYLINDER HEAD .
• Adjust the CAMSHAFTS with the special tool.
• Install exhaust camshaft ADJUSTER .
• Install the intake ADJUSTER .
• Install the intake adjuster VANOS CENTRAL VALVE .
• Install the exhaust camshaft adjuster VANOS CENTRAL VALVE .
• Pre-tension the TIMING CHAIN with the special tool.
• Tighten the exhaust camshaft adjuster VANOS CENTRAL VALVE .
• Tighten the intake adjuster VANOS CENTRAL VALVE .
• Disassemble all SPECIAL TOOLS .
• Install CHAIN TENSIONER .
• Check the camshaft TIMINGS .
• Install the exhaust turbocharger OIL RETURN LINE .
• Install the exhaust turbocharger COOLANT RETURN LINE .
• Install exhaust turbocharger COOLANT FEED LINE .
• Install the cylinder head HEAT SHIELD .
• Install cylinder head COVER .
• Install both ACTUATORS .
• PREPARE the injectors for installation.
• Install the RAIL with injectors.
• Install HIGH PRESSURE PUMP .
• Install the HIGH-PRESSURE LINE between the high-pressure pump and the high-pressure rail.
• Install all SPARK PLUGS .
• Install INTAKE PLENUM .
• Install the tank VENT VALVE .
• Top up the MOTOR OIL
• Remove the ENGINE from assembly jig.
• Install ENGINE .