11 33 516 Removing and installing/replacing rocker arms on left inlet side (N62 from 9/03): 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: Locating Lettering Marks On Eighth Cylinder

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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).

Fig 2: Rotating Eccentric Shaft At Dihedral Head

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Courtesy of BMW OF NORTH AMERICA, INC.

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

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

Fig 3: Rotating Eccentric Shaft Back To Minimum Position

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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 5 to 8 with R E1 to R E5 from inlet side.

Fig 4: Identifying Inlet Camshaft Bearing Cap Markings

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Courtesy of BMW OF NORTH AMERICA, INC.

Release nuts and remove bearing cap R E1.

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

Fig 5: Releasing Bearing Bracket Nuts

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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 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: Removing 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.

Fig 8: Securing Bearing Bracket

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Courtesy of BMW OF NORTH AMERICA, INC.

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

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 Bearing Bracket Lower Section

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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.

Fig 10: View Of Rocker Arm

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Courtesy of BMW OF NORTH AMERICA, INC.

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.