11 21 531 Replacing all crankshaft main bearing shells (B36A/B38A)

Special tools required: 

• 00 2 010

Installation note: 

Bearing classification from 1 to 3  (bearing cap) and A to C  (crankcase) possible.

• Bearing color blue
• Bearing color - green
• Bearing color brown

Necessary preliminary tasks: 

• Remove CRANKSHAFT 

Pay attention to the different bearing classification sequences in the crankcase and the bearing caps.

Bearing classification in crankcase: A/B/C 

The code letter (1) K  on the crankcase stands for "Kupplungsseite" (English = clutch end).

The following code letters (4 - 1) describe the bearing positions 4  to 1  from left to right.

Example (see illustration):

Bearing seat 4: 

Code letter B=  green bearing shell with lubricating groove.

Bearing seat 3: 

Code letter B=  green bearing shell with lubricating groove (thrust bearing).

Bearing seat 2: 

Code letter B=  green bearing shell with lubricating groove.

Bearing seat 1: 

Code letter B=  green bearing shell with lubricating groove.

Fig 1: Bearing Classification In Crankcase

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Bearing classification in bearing cap: 1/2/3 

The code numbers (1-4) describe the bearing positions 1  to 4  from left to right.

Example (see illustration):

Bearing cap 1: 

Code 2=  green bearing shell without lubricating groove.

Bearing cap 2: 

Code 2=  green bearing shell without lubricating groove.

Bearing cap 3: 

Code 2=  green bearing shell without lubricating groove (thrust bearing).

Fig 2: Bearing Classification In Bearing Cap

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Bearing cap 4: 

Code 2=  green bearing shell without lubricating groove.

Enter code letters and numbers for crankcase and crankshaft

Remove bearing shells 1 to 4.

Fig 3: Bearing Shells

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Place main bearing shell (1) with lubricating groove in crankcase (see arrows).

Observe combination of bearing colors according to the table.

Fig 4: Positioning Bearing Shell Lubricating Groove In Crankcase

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Place main bearing shell (1) with no lubricating groove in the bearing cap (see arrows).

Observe combination of bearing colors according to the table.

Fig 5: Positioning Bearing Shell Lubricating Groove In Bearing Cap

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Observe combination of bearing colors according to the table.

Fig 6: Thrust Bearing On Crankshaft At Bearing Position 3

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Install CRANKSHAFT .

Check side clearance. Refer to technical data for CRANKSHAFT WITH BEARING .

If necessary, check guide bearing shells, crankshaft and engine block.

Fig 7: Checking Crankshaft Side Clearance

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Rotate crankshaft (1) with special tool 00 2 010 in direction of arrow.

Check friction value of crankshaft. Refer to technical data for CRANKSHAFT WITH BEARING .

Fig 8: Turning Crankshaft With Special Tool (00 2 010)

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