11 37 014 Removing And Installing/Replacing Right Intermediate Levers (N73)

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NOTE:

For Special Tool identification, see ENGINE- SPECIAL TOOLS .

Special Tools Required:

11 9 470
11 9 473
11 9 474
11 9 475
11 9 476
11 9 480
11 9 490

(Cylinders 1 to 6).

Necessary Preliminary Tasks:

Remove right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING/SEALING RIGHT CYLINDER HEAD COVER (N73) .
Remove inlet and exhaust adjustment unit on right side. Refer to 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST VANOS ON LEFT SIDE (N73) .

IMPORTANT: Camshaft bearing caps of cylinders 1 to 6 and 7 to 12 must not be mixed up.

Set eccentric shaft at worm drive as shown in illustration to maximal stroke.

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

Fig 1: Locating Torsion Spring (Right)

Courtesy of BMW OF NORTH AMERICA, INC.

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

Fig 2: Aligning Eccentric Shaft (Right)

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Release nuts and remove bearing cap R E1.

IMPORTANT: Do not mix up camshaft bearing caps for cylinders 1 to 6 with bearing caps for cylinders 7 to 12.

Installation:

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES .

Fig 3: Identifying Bearing Cap R E1 (Right)

Courtesy of BMW OF NORTH AMERICA, INC.

Unscrew bolt (1).

Carefully unclip oil lines upwards in area (2).

Release nuts in area (3) from outside inwards.

Remove bearing bracket (4) towards top.

Fig 4: Locating Bearing Bracket (Right)

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

Fit bearing bracket in reverse sequence on special tool 11 9 470.

Fig 5: Installing Special Tool (11 9 470)

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

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

Fig 6: Locating Lower Section Of Bearing Bracket (Right)

Courtesy of BMW OF NORTH AMERICA, INC.

Raise torsion spring (1) with special tool 11 9 480.

Remove intermediate lever (2) upwards.

NOTE: One torsion spring holds two intermediate levers.

Installation:

Intermediate lever and rocker arm are run in together.

Used intermediate levers may only be reused in the same position.

IMPORTANT: Hold torsion spring (1) with special tool, attach special tool 11 9 490.

Fig 7: Raising Torsion Spring With Lever (Right)

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Support end of torsion spring protected with special tool 11 9 490 on inlet camshaft.

IMPORTANT: Risk Of Damage.

Fig 8: Supporting Torsion Spring End With Holding Sleeve (Right)

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Raise torsion spring on second side with special tool 11 9 480, remove intermediate lever upwards and secure with special tool 11 9 490.

IMPORTANT: Risk Of Damage.

Fig 9: Raising Torsion Spring With Special Tool (Right)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Intermediate levers (2) are divided into individual tolerance classes. Only intermediate levers of the same tolerance class may be fitted in a single cylinder head. The tolerance classes are designated as illustrated with numbers from 1 to 5. Used intermediate levers (2) may only be reused in the same position.

Fig 10: Identifying Intermediate Levers Tolerance Class Marking