11 21 531 Replacing main crankshaft bearing shell (M62): Notes

WARNING: This page is about a different variant/trim than selected.

(engine dismantled)

Clean components before installation.

Preliminary tasks are described under Replacing Crankshaft,

refer to 11 21 500 REPLACING CRANKSHAFT (M62) .

CAUTION: Note grinding stage of crankshaft,

refer to ENGINE - TECHNICAL DATA - X5 .

Fig 1: Identifying Grinding Stage Of Crankshaft

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NOTE: Install main bearing shells (1) in the motor block with lubrication groove.
Install main bearing shells (2) without lubrication groove in the main bearing caps.

Fig 2: Identifying Main Bearing Shells

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NOTE: When crankshaft or main bearing shells are being replaced, the classification for the arrangement of the main bearing shells in the crankcase is no longer of significance. Install yellow main bearing shells in crankcase.

Fig 3: Installing Yellow Main Bearing Shells In Crankcase

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NOTE: The crankshaft is marked with yellow, green or white paint according to the tolerance of the main journal.

Coat bearing shells with oil.

Install crankshaft.

Fig 4: Identifying Crankshaft Marked Points

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NOTE: Place main bearing shells with same color code as that of crankshaft in main bearing caps.

Fig 5: Placing Main Bearing Shells

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Release hex head in main bearing cap.

Fig 6: Releasing Hex Head In Main Bearing Cap

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NOTE:

(3) Install stop disk for collar bearing (in engine block).
(4) Install stop disk for collar bearing (in main bearing cap).

Fig 7: Identifying Stop Disk For Collar Bearing
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CAUTION: Check installed direction. Lubricant groove must be facing crankshaft.

Insert stop disks for collar bearing on both sides between crankshaft and engine block at main bearing 5.

Fig 8: Checking Installed Direction Of Crankshaft

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Align thrust washers with contact face of main bearing caps.

Fig 9: Aligning Thrust Washers With Contact Face Of Main Bearing Caps

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NOTE: Main bearing caps (1 to 3) are marked with punch numbers.
The main bearing caps 4 and 5 are not marked.

NOTE: Main bearing cap no. 5 can be identified by the recesses for the stop disks of the thrust bearing.

Fig 10: Identifying Main Bearing Cap No

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Insert stop disks on both sides into grooves of main bearing cap no. 5.

Fig 11: Inserting Stop Disks Into Grooves Of Main Bearing Cap No.5

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