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

Removal of rocker arms is described separately from installation.

Remove servomotor for right eccentric shaft.

Remove ignition coils on cylinder bank 1 to 4. See IGNITION COIL .

Remove right cylinder head cover.

Remove spark plugs on cylinder bank 1 to 4.

Install inlet and exhaust adjustment unit on right side.

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: Rotating Inlet Camshaft

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Courtesy of BMW OF NORTH AMERICA, INC.

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: Removing Pretension Torsion Spring With Cable Strap From Roller

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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 3: Rotating Eccentric Shaft At Dihedral Head

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Courtesy of BMW OF NORTH AMERICA, INC.

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: Removing Bearing Cap L E1

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Courtesy of BMW OF NORTH AMERICA, INC.

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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Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 6: Clamping Special Tool 11 9 470 In Vise

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Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Do not tilt bearing bracket (1).

Carefully lift out bearing bracket (1).

Fig 7: Lifting Out Bearing Bracket

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Courtesy of BMW OF NORTH AMERICA, INC.

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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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 9: Remaining Lower Section Of Bearing Bracket On Cylinder Head

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Courtesy of BMW OF NORTH AMERICA, INC.

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 10: Identifying Rocker Arms

G03267233

Courtesy of BMW OF NORTH AMERICA, INC.