Mounting bearing strip

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Pre-install special tool 11 4 462 on cylinder no. 2.

Insert special tool 11 4 463 in screw connection of cylinder head cover.

IMPORTANT: Special tool 11 4 463 is a special screw.

Press down rocker arms (3) on cylinder no. 2 with spindle nut (2) of special tool 11 4 462.

Fig 1: Pressing Rocker Arms

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Installation:

Before mounting the exhaust camshaft on the correct cam follower seat (1), pay attention to the hydraulic valve clearance adjustment element and the valve.

Refer to Removing and installing/replacing all CAM FOLLOWERS .

Fig 2: Identifying Cam Follower Seat

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Position lower bearing strip (1) with exhaust camshaft (2) on rocker arms.

Align exhaust camshaft (2).

Cylinder nos. 2 and 4 are at valve overlap.

Cams (3) on cylinder no. 1 point upwards at an angle.

Part number (4) on mounting flats of exhaust camshaft (2) points upwards.

Fig 3: Identifying Lower Bearing Strip, Exhaust Camshaft And Cams

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IMPORTANT: There must be no adhesive residues in the cylinder head tapped holes.
Clean threaded holes.

Fit upper bearing strip (1).

Insert bolts dry.

Tension down upper bearing strip (1) with exhaust camshaft at bearing points 3 and 5 through a 1/2 bolt turn.

Fig 4: Tightening Bearing Strips Bolt

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Join exhaust camshaft to upper and lower bearing strips (1) with torque wrench (2) from inside outwards to 8 Nm .

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

Installation:

Upper and lower bearing strips must be aligned to each other at ground surfaces (1 and 2).

Make sure that the thrust piece and the legs of special tools 11 4 461 rest on the milled surfaces.

Fig 5: Identifying Bearing Strips Aligning Area

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NOTE: Schematic depiction of special tool 11 4 461 at upper bearing strip (1) and lower bearing strip (2).
Pre-tension all special tools 11 4 461 with special tool 11 4 350 only.

IMPORTANT: Tighten screw (3) on thrust piece to 2 Nm. Risk of damage!

Fig 6: Identifying Screw, Upper And Lower Bearing Strips

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Position special tool 11 4 461 over screw connection of bearing strips.

Make sure that the legs rest exactly on the ground surfaces of the upper bearing strip (2) and lower bearing strip (1).

Fig 7: Positioning Special Tool (11 4 461) On Screw Connection Of Bearing Strips

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Initially tighten screw of special tool 11 4 461 to ground surfaces of upper bearing strip (1) and lower bearing strip (2).

IMPORTANT: Tighten screws on thrust piece to 2 Nm. Risk of damage!

Fig 8: Tightening Screw Of Special Tool (11 4 461)

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IMPORTANT: Set special tool 11 4 350 to 2 Nm.
Pre-tension all special tools 11 4 461 with special tool 11 4 350 only.

Fig 9: Identifying Special Tool (11 4 461)

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Mount special tools 11 4 461 with screw (1) to inside of cylinder head.

Mount special tool 11 4 461 with screw facing outwards on cylinder no. 2.

Position special tools 11 4 461 so that screw connections (2) of bearing strip are easily accessible.

Fig 10: Mounting Special Tool (11 4 461) On Cylinder Head Screw

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

Tightening torque 11 31 1AZ .

IMPORTANT: Remove special tool 11 4 461 only when exhaust camshaft screw connection is completed .

Fig 11: Tightening Lower/Upper Bearing Strips

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Assemble engine.