Mounting bearing strip

Pre-install special tool 11 7 100 on cylinder no. 2.

IMPORTANT: Special tool 11 8 552 is a special screw.

Press down rocker arms (3) on cylinder no. 2 with spindle nut (2) of special tool 11 7 100 .

Fig 1: Pressing Down Rocker Arms On Cylinder No. 2 With Spindle Nut Of Special Tool (11 7 100)

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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 2: Identifying Lower Bearing Strip, Exhaust Camshaft, Cams And Part Number

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Insert exhaust camshaft so that none of the latching mechanisms for the plain rectangular compression rings (1) point to a bearing cap joint.

Centre latch mechanism of the plain rectangular compression rings with the bearing cap.

Fig 3: Identifying Plain Rectangular Compression Rings

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Insert exhaust camshaft so that the data code (1) on the mounting flats faces up.

NOTE: Intake camshaft picture.

Fig 4: Identifying Read Code On Intake And Exhaust Camshafts

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The cam (1) at cylinder 6 points downward at an angle.

Fig 5: Identifying Cam

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

Clean threaded holes.

Fit upper bearing strip (1).

Insert bolts dry.

Join exhaust camshaft to lower and upper bearing strips (1) with torque wrench (2) to 8 Nm in sequential order from 1 to 15.

Fig 6: Identifying Bearing Strip Screws Releasing Sequence

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

Installation note:

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

Make sure that the synchronizing key and the shanks of special tools 11 4 461 rest on the milled surfaces.

Fig 7: Identifying Upper And Lower Bearing Strips Ground Surfaces

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

Preload all special tools 11 8 553 with special tool 11 4 350 only.

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

Fig 8: Identifying Special Tool (11 8 553) At Upper Bearing Strip And Lower Bearing Strip

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

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

Fig 9: Positioning Special Tool (11 8 553) Over Screw Connection Of Bearing Strips

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

IMPORTANT: Tighten screws on synchronizing key to 2 Nm. Risk of damage!

Fig 10: Tightening Screw Of Special Tool (11 8 553) To Ground Surfaces Of Upper Bearing Strip And Lower Bearing Strip

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

Fig 11: Identifying Special Tool

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Mount special tools 11 8 553 to inside of cylinder head with pressure bolt.

Mount special tool 11 8 553 on cylinder no. 2 with pressure bolt facing outward.

Position special tools 11 8 553 so that screw connections (2) of bearing strip are easily accessible.

Fig 12: Mounting Special Tool (11 8 553) On Cylinder No. 2 With Pressure Bolt

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Tighten top and bottom bearing strip with special tool 00 9 120.

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

Fig 13: Tightening Top And Bottom Bearing Strip With Special Tool (00 9 120)

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Assemble engine.