11 33 050 Removing And Installing/Replacing All Rocker Arms (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to ENGINE - SPECIAL TOOLS (N51) .

11 4 480

Necessary preliminary tasks:

Remove cylinder head cover . See 11 12 000 REMOVING AND INSTALLING OR SEALING CYLINDER HEAD COVER (N51) .
Remove intermediate lever . See 11 37 010 REMOVING AND INSTALLING/REPLACING INTERMEDIATE LEVER (N51) .
Remove exhaust camshaft . See 11 31 028 REMOVING AND INSTALLING/REPLACING EXHAUST CAMSHAFT (N51) .

IMPORTANT: Rocker arms (1) are divided into bearing categories.
The tolerance classes are designated as illustrated with numbers from 1 to 5.
Already used rocker arms (1) may only be reused in the same position.

Detach roller cam followers (1) from HVCA element and remove.

Set all roller cam followers down in special tool 11 4 480 in a tidy and orderly fashion. See 11 4 480 PLACEMENT BOARDS (2 X) .

Fig 1: Identifying Rocker Arm

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

Before installing exhaust camshaft and intermediate lever, make sure roller cam followers are correctly seated.

Remove HVCA element in direction of arrow.

Installation:

If the HVCA elements are to be reused, set them down in special tool 11 4 480 in a tidy and orderly fashion with the roller cam followers.

Fig 2: Removing HVCA Element

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.