11 12 005 Removing and installing/sealing left cylinder head cover (N63O1)

Special tools required:

Necessary preliminary tasks:

Disconnect NEGATIVE TERMINAL .
Remove ACOUSTIC COVER
Remove left INTERCOOLER .
Remove INTAKE SILENCER HOUSING .
Remove coolant valve for heater feed line.
Disconnect FUEL DELIVERY LINE .
Detach wiring harness for injectors and lay to one side.
Remove IGNITION COILS , cylinders 5-8.
Remove HIGH PRESSURE PUMP .
Remove injectors . See 13 53 310 REMOVING AND INSTALLING OR REPLACING AN INJECTOR (N63 B40/B44 O 1) , cylinders 5-8.
Remove VACUUM PUMP .
Remove CATALYTIC CONVERTER for cylinders 1-4.
Remove CATALYTIC CONVERTERS , cylinders 5-8.

Release screws (1).

Remove heat shield (2).

Fig 1: Identifying Heat Shield And Screws

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Release screw connections in the sequence (16 to 1).

Remove cylinder head cover.

Illustration S63T1.

Fig 2: Identifying Screw Connections Of Cylinder Head Cover

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Clean sealing surface (1) with special tool 11 4 470 .

NOTE: Illustrations shows N63 engine.

Fig 3: Identifying Sealing Surface

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Installation note:

Renew profile seals (1 and 2) of cylinder head cover.

Fig 4: Identifying Profile Seals

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Installation note:

It is important to join screw (15 and 16) for exact positioning of the camshaft sensors.

Mount cylinder head covers.

Position screw (15 and 16).

Release screws again by a 90° turn.

Secure cylinder head cover in sequence (1 to 17) in two work steps.

Tightening torque 11 12 3AZ .

Fig 5: Identifying Cylinder Head Cover Screws

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Assemble engine.