11 21 531 Replacing all crankshaft main bearing shells (N63) without hybrid drive

WARNING: This page is about a different car, the 2013 BMW X5, 2012 BMW X5, and 2011 BMW X5. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

IMPORTANT: Risk of injury from sharp edge of housing.

IMPORTANT: If a crankcase or a crankshaft is replaced, old and new identifications can be used.
A mixed installation is permissible.

Example:

An old crankcase with an old crankcase designation and a new crankshaft with a new crankshaft designation.

An old crankshaft with an older crankshaft designation and a new crankcase with a new crankcase designation.

Or a new crankcase with a new crankshaft with new identifications.

Necessary preliminary tasks:

Remove CRANKSHAFT

NOTE: The main bearing caps 1 to 5 are marked with numbers.

Fig 1: Identifying Main Bearing Caps Sequence

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Observe crankshaft construction stage:

S: Series

B: Repair stage 1

C: Repair stage 2

The letters denote the bearing shell classification for the relevant bearing position from 1 to 5 (main bearing cap).

The first letter on the left applies to the first bearing position at the front on the timing chain drive.

Color assignment on crankshaft 1 to 5

Y= yellow

G= green

V= violet

Fig 2: Locating Color Assignment Code On Crankshaft

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The letters denote the bearing shell classification for the relevant bearing position from 1 to 5 in the crankcase and is located on the transmission side in the Vee. The first letter on the left applies to the first bearing position at the front on the timing chain drive.

Color assignment in crankcase 1 to 5.

Y= yellow

G= green

V= violet

Fig 3: Identifying Bearing Shell Classification Codes

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IMPORTANT: New bearing shell classification.

The letters denote the bearing shell classification for the relevant bearing position from 1 to 5 (main bearing cap).

The first letter on the left applies to the first bearing position at the front on the timing chain drive.

Color assignment on crankshaft 1 to 5

Fig 4: Identifying Bearing Shell Classification Codes

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IMPORTANT: Changed bearing classification: Bearing position 1, 2, 3, 4 and 5

Code letter	Color code
New (A to H) Old Y	Yellow Yellow
New (I to R) Old G	Green Green
New (S is Z) Old V	Violet

	Tolerance classes	Bearing shell covers		Tolerance classes	Bearing shell covers
Crankcase	A B C D E G H	Yellow Yellow	Crankshaft	A B C D E G H	Yellow Yellow
Crankcase	I K M N P q R	Green Green	Crankshaft	I K M N P q R	Green Green
Crankcase	S T U W X Z-Series	Violet	Crankshaft	S T U W X Z-Series	Violet

Installation note:

Install main bearing shells (1) with lubrication groove in crankcase.

Install main bearing shells (2) without lubrication groove in the main bearing caps.

Fig 5: Identifying Main Bearing Shells

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NOTE: Main bearing cap number 3 can be identified by the surfaces (1) for the thrust washers of the thrust bearing.

Fig 6: Identifying Main Bearing Cap Surface

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Turn back thread support bushing into main bearing cap.

Fig 7: Turning Back Thread Support Bushing Into Main Bearing Cap

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Checking main bearing clearance:

To check crankshaft bearing play, use the existing main bearing bolts.

IMPORTANT: Risk of cracking!

No oil is permitted in the blind holes.

Do not twist crankshaft.

Place special tool 00 2 590 (Plastigage model PG 1) onto the oil-free crankshaft (see arrow).

Fig 8: Checking Main Bearing Clearance

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Tighten down all collar bolts (M11) of main bearing caps in sequence 1 to 5 to jointing torque.

Tightening torque: 11 11 1AZ .

Fig 9: Crankshaft Bolts (M11) Tightening/Loosening Sequence (N63)

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Tighten down all collar bolts (M11) of main bearing caps with special tool 00 9 120 with angle of rotation.

Fig 10: Tightening Collar Bolts (M11) Of Main Bearing Caps

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Remove main bearing cap.

Read off main bearing clearance at width of flattened plastic thread with assistance of measurement scale.

Main bearing play. See 1121 CRANKSHAFT AND BEARINGS (N63) .

Remove plastic thread
Apply a coat of oil to new bearing shells and crankshaft

Fig 11: Checking Main Bearing Cap Radial Clearance
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NOTE: Always replace main bearing bolts in main bearing caps with new bolts.
Do not wash off bolt coating.

IMPORTANT: Risk of cracking!

No oil is permitted in the blind holes.

Install CRANKSHAFT .

Carefully strike back and front of crankshaft with a plastic hammer to center guide bearing (do not damage crankshaft).

Secure special tool 11 6 252 with magnetic foot on crankcase.

Position special tool 11 6 251 .

Tightening specifications for main bearing:

Check Axial Play. See 1121 CRANKSHAFT AND BEARINGS (N63) .

Check guide bearing shell, crankshaft and crankcase if necessary.

Fig 12: Checking Guide Bearing Shell Axial Play

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Assemble engine.