11 34 552 Removing and installing/replacing all valves (N55)

WARNING: This page does not describe the selected car, but rather 7 other vehicles, including the 2017 BMW X3, 2016 BMW X3, 2015 BMW X3, 2014 BMW X3, and 2013 BMW X3. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

Necessary preliminary tasks:

Remove CYLINDER HEAD .
Remove INTERMEDIATE LEVER .
Remove ECCENTRIC SHAFT .
Remove INTAKE CAMSHAFT .
Remove EXHAUST CAMSHAFT .
Remove ROCKER ARM .
Remove VALVE SPRINGS .
Remove VALVE STEM SEALS .

Arrangement:

Intake valve 5 mm dia.
Valve stem seal with lower spring cup
Valve spring
Upper spring cup
Valve keys

If the valves are to be reused, they must be placed in neat order in special tool 11 4 481 .

Fig 1: Identifying Valve Components

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Discharge valve 6 mm dia.
Valve stem seal with lower spring cup
Valve spring
Upper spring cup
Valve keys

If the valves are to be reused, they must be placed in neat order in special tool 11 4 482 .

Fig 2: Identifying Valve Components

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of Digital Engine Electronics; if necessary, readjust uniform mixture distribution.