11 33 516 Removing And Installing/Replacing Rocker Arms On Left Inlet Side (N62 From 9/03)

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

NOTE:

For Special Tool identification, refer to ENGINE - SPECIAL TOOLS - 645CI .

Special Tools Required:

11 9 470
11 9 473

(cylinder bank 5 to 8)

Removal

Removal of rocker arms is described separately from installation.

Remove servomotor for left eccentric shaft. Refer to 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT ECCENTRIC SHAFT (N62) .

Remove ignition coils on cylinder bank 5 to 8.

Remove left cylinder head cover. Refer to 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N62/N62TU) .

Remove spark plugs on cylinder bank 5 to 8.

Remove inlet and exhaust adjustment unit on left side. Refer to 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON LEFT SIDE (N62) .

IMPORTANT: The inlet camshaft must first be rotated so that when the bearing bracket is removed the intermediate levers do not slip out and damage the camshaft.

Rotate inlet camshaft against direction of rotation until lettering (1) on 8th cylinder points upwards in cylinder axis and cam is horizontal.

Fig 1: Identifying Inlet Camshaft Position

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IMPORTANT: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

NOTE: Bearing caps of inlet camshaft are marked on cylinder bank 5 to 8 with R E1 to R E5 from inlet side.

Release nuts and remove bearing cap R E1.

Fig 2: Removing Bearing Cap R E1

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Release 8 nuts of bearing bracket (1) from outside to inside.

Fig 3: Releasing Nuts Of Bearing Bracket From Outside To Inside

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Clamp special tool 11 9 470 as illustrated in a vise.

Fig 4: Clamping Special Tool 11 9 470

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IMPORTANT: Do not tilt bearing bracket (1).

Carefully lift out bearing bracket (1).

Fig 5: Lifting Out Bearing Bracket (1)

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Place bearing bracket (1) with inlet camshaft and eccentric shaft as illustrated on special tool 11 9 470.

Secure bearing bracket (1) with a nut (special tool 11 9 473).

Fig 6: Securing Bearing Bracket (1) With A Nut (Special Tool 11 9 473)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: The lower section of the bearing bracket (1) is machined with the cylinder head and must not be mixed up.

NOTE: Lower section of bearing bracket (1) remains on cylinder head.

Fig 7: Identifying Lower Section Of Bearing Bracket Position

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IMPORTANT: Rockers arms (1) are divided into individual tolerance classes. The tolerance classes are designated as illustrated with the numbers from 1 to 4. Used rocker arms (1) may only be reused in the same position.

When replacing rocker arms (1) on inlet side: install rocker arms of the same tolerance class in the same position.

Remove rocker arms (1) on inlet side and set aside in neat order.

Fig 8: Removing Rocker Arms On Inlet Side

Courtesy of BMW OF NORTH AMERICA, INC.

Installation

Installation of rocker arms is described separately from removal.

Clean all bearings and cams of inlet camshaft and lubricate with engine oil.

Ends of compression rings (1) point upwards.

Make sure compression rings (1) are engaged at ends.

Fig 9: Identifying Ends Of Compression Rings

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Install rocker arms (1) on inlet side.

IMPORTANT: Rocker arms (1) slip slightly when bearing bracket is fitted. Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Align rocker arms (1) straight.

Fig 10: Aligning Rocker Arms