11 33 517 Removing and installing/replacing rocker arms on right inlet side (N62 to 9/03)

NOTE:

For Special Tool identification, see ENGINE - SPECIAL TOOLS - 5-SERIES (E60) .

Special Tools Required:

11 9 470
11 9 473

(cylinder bank 1 to 4)

Removal:

Removal of rocker arms is described separately from installation.

Remove servomotor for right eccentric shaft. Refer to 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62/N62TU) .

Remove ignition coils on cylinder bank 1 to 4.

Remove right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING/SEALING RIGHT CYLINDER HEAD COVER (N62/N62TU) .

Remove spark plugs on cylinder bank 1 to 4.

Install inlet and exhaust adjustment unit on right side. Refer to 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62/N62TU) .

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 in direction of rotation until cam on 1st cylinder is positioned horizontally as shown in illustration.

Fig 1: Aligning Cam On 1st Cylinder

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Rotate eccentric shaft at dihedral head as illustrated in order to reduce tension on torsion spring (1).

Pretension torsion spring (1) with a cable strap (2), feed out from roller (3) and carefully relieve tension.

Fig 2: Securing Torsion Spring With Cable Strap

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Rotate eccentric shaft at dihedral head as shown in illustration back to minimum stroke position.

Fig 3: Aligning Eccentric Shaft To Minimum Stroke 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 1 to 4 with L E1 to L E5 from inlet side.

Release nuts and remove bearing cap L E1.

Fig 4: Locating Bearing Cap L E1

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

Fig 5: 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 6: Clamping Special Tool 11 9 470 In A Vise

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IMPORTANT: Do not tilt bearing bracket (1).

Carefully lift out bearing bracket (1).

Fig 7: View Of Bearing Bracket

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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 8: Securing Bearing Bracket With Nut (Special Tool 11 9 473)

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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 9: Identifying Lower Section Of Bearing Bracket

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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.

Installation:

Installation of rocker arms is described separately from removal.

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

Fig 10: Identifying Tolerance Classes On Rocker Arms

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Ends of compression rings (1) point upwards.

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

Fig 11: Locating Compression Ring Ends

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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 12: Aligning Rocker Arms

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Remove special tool 11 9 473.

Remove bearing bracket (1) from special tool 11 9 470.

Fig 13: Removing Bearing Bracket From Special Tool 11 9 470

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IMPORTANT: Do not tilt bearing bracket (1).

Lower bearing bracket (1) from above and carefully bring into contact with cylinder head.

Insert nuts and tighten by hand without play.

IMPORTANT: Make sure none of the intermediate levers or rocker arms have slipped out.

Tighten down nuts from inside to outside.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 14: Identifying Nuts Of Bearing Brackets

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

Fit bearing cap L E1 in such a way that marking is legible from inlet side.

Install nuts and tighten down.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 15: Identifying Bearing Cap L E1

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Rotate eccentric shaft at dihedral head as illustrated in order to reduce tension on torsion spring (1).

Pretension torsion spring (1) with a cable strap (2) and carefully fit on roller (3).

Fig 16: Securing Torsion Spring With Cable Strap

Courtesy of BMW OF NORTH AMERICA, INC.

Rotate eccentric shaft at dihedral head as shown in illustration back to minimum stroke position.

Fig 17: Aligning Eccentric Shaft To Minimum Stroke Position

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Rotate inlet camshaft at hexagon head against direction of rotation until cam on 1st cylinder points downwards at an angle as shown in illustration.

Fig 18: Rotating Inlet Camshaft At Hexagon Head Against Direction Of Rotation

Courtesy of BMW OF NORTH AMERICA, INC.

Install inlet and exhaust adjustment unit on right side. Refer to 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62/N62TU) .

Install spark plugs on cylinder bank 1 to 4.

Install right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING/SEALING RIGHT CYLINDER HEAD COVER (N62/N62TU) .

Install ignition coils on cylinder bank 1 to 4.

Install servomotor for right eccentric shaft. Refer to 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62/N62TU) .

Assemble engine.