Replacing the main bearing shells and the guide bearing shells

WARNING: This page is about a different car, the 2022 BMW X7, 2021 BMW X7, 2020 BMW X7, and 2019 BMW X7. However, it is still accessible from the selected car via links, so may be relevant.

NOTE: RISK OF DAMAGE
Engine damage caused by incorrectly installed bearing shells and bearing brackets .
If the bearing shells and bearing brackets are installed incorrectly, then engine damage can occur .

Always install all bearing shells and bearing brackets in the same position from which they were removed.

NOTE: TECHNICAL INFORMATION
The main bearing shells and guide bearing shells are classified by numbers.
Observe the classification of the main and guide bearing shells.

Remove the main bearing shells with lubricating groove (1) to (3) and (5) to (7) from the crankcase.
Remove the guide bearing shell with lubricating groove (4) from the crankcase.

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Remove the main bearing shells (1) to (3) and (5) to (7) from the crankshaft bearing caps.
Remove the guide bearing shell (4) from the crankshaft bearing cap.

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Make sure that the correct classification (arrows) is installed.
Replace main bearing shells (1) with lubricating groove.
Parts: Main bearing shells with lubricating groove

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Make sure that the correct classification (arrows) is installed.
Replace main bearing shells (1) without lubricating groove.
Parts: Main bearing shells without lubricating groove

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Make sure that the correct classification (arrows) is installed.
Replace the guide bearing shell with lubricating groove (1) and the guide bearing shell (2) without lubricating groove.
Parts: Guide bearing shells

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

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

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

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

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Install the main bearing shells (1) to (3) and (5) to (7) in the crankshaft bearing cap.
Install the guide bearing shell (4) in the crankshaft bearing cap.
Oil all main bearing shells and guide bearing shells (1) to (7) .

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Install main bearing shells with lubricating groove (1) to (3) and (5) to (7) in the crankcase.
Install the guide bearing shell with lubricating groove (4) in the crankcase.
Oil all main bearing shells and guide bearing shells with lubricating groove (1) to (7) .

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Follow-up work

Refer to INSTALLING THE CRANKSHAFT .
Refer to CHECKING THE CRANKSHAFT SIDE CLEARANCE .
Refer to CHECKING THE COEFFICIENT OF FRICTION FOR THE CRANKSHAFT .
Refer to MEASURING ALL PISTONS .
Refer to MEASURING A CYLINDER .
Refer to INSTALLING ALL THE PISTONS WITH THE CONNECTING ROD .
Refer to INSTALLING THE OIL DEFLECTOR .
Refer to INSTALLING OIL PUMP .
Refer to INSTALLING TIMING CHAIN .
Refer to INSTALLING THE REAR TIMING CASE COVER .
Refer to REFITTING OIL PAN .
Refer to INSTALLING BEARING BRACKET .
Refer to INSTALLING FRONT AXLE DIFFERENTIAL .
Refer to INSTALLING THE FLYWHEEL .
Refer to INSTALLING THE VIBRATION DAMPER .
Refer to BLOCKING THE CRANKSHAFT IN THE TDC FIRING POSITION OF CYLINDER 1 .
Refer to SEALING THE OIL DUCT .
Refer to CLEANING SEALING SURFACES .
Refer to INSTALLING THE CYLINDER HEAD GASKET .
Refer to INSTALLING THE CYLINDER HEAD .
Refer to ADJUSTING THE CAMSHAFTS WITH THE SPECIAL TOOL .
Refer to INSTALLING THE INTAKE ADJUSTER .
Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to INSTALLING EXHAUST CAMSHAFT ADJUSTER .
Refer to INSTALLING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to PRE-TENSIONING THE TIMING CHAIN WITH THE SPECIAL TOOL .
Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE EXHAUST CAMSHAFT ADJUSTER .
Refer to TIGHTENING THE VANOS CENTRAL VALVE OF THE INTAKE ADJUSTER .
Refer to DISASSEMBLING ALL SPECIAL TOOLS .
Refer to INSTALLING CHAIN TENSIONER .
Refer to CHECKING THE TIMINGS OF THE CAMSHAFT .
Refer to INSTALLING THE COOLANT LINE BETWEEN THE CYLINDER HEAD AND THE COOLANT PUMP .
Refer to INSTALLING THE OIL RETURN LINE FOR THE EXHAUST TURBOCHARGER .
Refer to INSTALLING CYLINDER HEAD COVER .
Refer to INSTALLING BOTH ACTUATORS .
Refer to PREPARING THE INJECTORS FOR INSTALLATION .
Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 4 TO 6 .
Refer to INSTALLING THE HIGH-PRESSURE RAIL WITH INJECTORS OF THE CYLINDERS 1 TO 3 .
Refer to INSTALLING THE HIGH-PRESSURE LINE BETWEEN THE HIGH-PRESSURE PUMP AND THE HIGH-PRESSURE RAIL .
Refer to INSTALLING HIGH PRESSURE PUMP .
Refer to INSTALLING ALL SPARK PLUGS .
Refer to INSTALLING ALL IGNITION COILS .
Refer to INSTALLING CATALYTIC CONVERTER .
Refer to INSTALLING THE OXYGEN SENSOR MONITOR .
Refer to INSTALLING LAMBDA OXYGEN SENSOR .
Refer to INSTALLING THE INTAKE PLENUM .
Refer to INSTALLING THE TANK VENT VALVE .
Refer to INSTALLING CHARGE AIR LINE .
Refer to INSTALLING ACOUSTIC COVER AT REAR .
Refer to FILLING ENGINE OIL .
Refer to CHECK/ADD FRONT AXLE TRANSMISSION OIL .
Refer to REMOVING THE ENGINE FROM THE ASSEMBLY JIG .
Refer to MOUNTING THE ENGINE ON THE FRONT AXLE .
Refer to INSTALLING THE COMPLETE FRONT AXLE WITH THE ENGINE AND TRANSMISSION .
Refer to ACTIVATING THE 48 V ELECTRICAL SYSTEM .