Installing camshaft bearing bank

Pre-install special tool 11 8 551 on cylinder no. 2.

Observe markings E and A

E: Inlet side

A: Exhaust side

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

Press down roller cam follower (1) on cylinder no. 2 with spindle nut of special tool 11 8 551.

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

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Lay lower bearing strip (1) on cylinder head.

Installation:

Lubricate all bearing points with engine oil.

Fig 2: Identifying Lower Bearing Strip On Cylinder Head

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Insert exhaust camshaft (1) in lower bearing bank.

Installation:

Lubricate all bearing positions and cams with engine oil.

Fig 3: Identifying Exhaust Camshaft In Lower Bearing Bank

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Installation position (1) of exhaust camshaft (2) at cylinder no. 1.

Fig 4: Identifying Installation Position Of Exhaust Camshaft At Cylinder No. 1

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Join exhaust camshaft to lower and upper bearing strips with torque wrench from inside outwards to 8 Nm .

Release all screws of bearing bank (1) from outside inwards by 90°.

Check position of exhaust camshaft (2) at cylinder no. 6.

Roller cam follower (1) is not actuated.

Fig 5: Identifying Exhaust Camshaft Position And Cam Follower

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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 6: Identifying Lower And Upper Bearing Banks Alignment Position

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

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

Fig 7: Schematic Depiction Of Special Tool 11 8 553 On Lower And Upper Bearing Bank

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

NOTE: Make sure that legs come into exact contact on ground surfaces, lower bearing bank (1) and upper bearing bank (2).

Fig 8: 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 (2) and upper bearing bank (1).

IMPORTANT: Tighten screws on thrust piece to 2 Nm.

Fig 9: 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 10: Identifying Special Tools 11 8 553 With Special Tool 11 4 350

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Mount special tools 11 8 553 with screw (1) to inside of cylinder head.

On cylinder no. 2 mount special tool 11 8 553 with screw (1) facing outwards.

Position special tools 11 4 350 so that screw connections (2) of bearing bank are easily accessible.

Fig 11: Identifying Special Tools 11 8 553 And Special Tool 11 4 350

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

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

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 12: Tightening Banks Using Special Tool 00 9 120

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Assemble engine.