Installing camshaft bearing bank

Pre-install special tool 11 8 551on cylinder nos. 2 and 3.

Insert special tool 11 8 552 in screw connection of cylinder head cover.

Special tool 11 8 551is marked with letters E and A.

E = Inlet side

A = Exhaust side

Press down roller cam follower on cylinder no. 3 with spindle nut (2) of special tool 11 8 551.

Fig 1: Identifying Special Tools 11 8 551 And 11 8 552

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Installation:

Before installing inlet camshaft, make sure roller cam follower is correctly seated on HVCA element and valve.

Fig 2: Identifying Roller Cam Follower Installation Position

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Installation:

Pre-install bearing strip of inlet camshaft.

Lubricate all bearing points in lower bearing strip with engine oil.

Installation:

Lay inlet camshaft (1) in bearing strip.

Fig 3: Identifying Inlet Camshaft Marked

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Rotate inlet camshaft (1) at cylinder no. 1 into position (2).

Fig 4: Identifying Inlet Camshaft With Position

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Installation:

Lower and upper bearing banks must be aligned to each other at ground surfaces (1 and 2).

Bring thrust piece and legs of special tool 11 8 553 into contact at milled surfaces.

Fig 5: Identifying Lower And Upper Bearing Banks Alignment Position

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NOTE: Schematic depiction of special tool 11 8 553 at lower bearing bank (1) and upper bearing bank (2).

IMPORTANT: Tighten screw (3) on thrust piece to 2 Nm.

Fig 6: Schematic Depiction Of Special Tool 11 8 553 On Lower Bearing Bank And Upper Bearing Bank

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Position special tool 11 8 553 over screw connection of bearing banks.

Make sure that legs come into exact contact on ground

surfaces, lower bearing bank (1) and upper bearing bank (2).

Fig 7: Positioning Special Tool 11 8 553 Over Screw Connection Of Bearing Banks

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Initially tighten screw of special tool 11 8 553 to ground surfaces of lower bearing bank (1) and upper bearing bank (2).

IMPORTANT: Tighten screws on thrust piece to 2 Nm.

Fig 8: Tightening Screw Of Special Tool 11 8 553

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IMPORTANT: Set special tool 11 4 350 to 2 Nm. Pretension all special tools 11 8 553 with special tool 11 4 350 only.

Fig 9: Identifying Special Tools 11 8 553 With Special Tool 11 4 350

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Install upper and lower bearing strips (1).

Pre-install all special tools 11 8 553.

IMPORTANT: Secure special tool 11 8 553 to max. 2 Nm .

Fig 10: Identifying Upper And Lower Bearing Strips With Special Tools 11 8 553

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Install inlet camshaft with bearing banks (1) on cylinder head.

Fig 11: Identifying Bearing Banks On Cylinder Head

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Check position of intake camshaft (1) at cylinder no. 6.

Roller cam follower (2) is not actuated.

Fig 12: Position Of Intake Camshaft And Roller Cam Follower

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Tighten lower and upper bearing banks with special tool 00 9 120.

Tightening torque. See 11 31 1AZ in 11 31 CAMSHAFT .

IMPORTANT: Remove special tool 11 8 553 only when camshaft screw connection is completed .

Fig 13: Tightening Lower And Upper Bearing Banks Using Special Tool 00 9 120

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Adjust valve timing.

Assemble engine.