11 34 715 Replacing all valve springs (N51)

WARNING: This page does not describe the selected car, but rather 16 other vehicles, including the 2013 BMW 328xi, 2013 BMW 328i, 2012 BMW 328xi, 2012 BMW 328i, and 2011 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 0 346
11 4 480
11 9 000
11 9 017

Necessary preliminary tasks:

Place cylinder head on special tool 11 9 000.

Press down intake valves with special tool 11 9 017.

Exhaust valves with special tool 11 0 346

Fig 1: Special Tools (11 9 000) And (11 9 017)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove valve cotters with a magnet.

Remove valve spring with spring plates.

Set down on special tool 11 4 480 in a tidy and orderly fashion.

Fig 2: Removing Valve Cotters

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Incorrect installation possible.

Incorrect installation will result in valve spring breakage.

Risk of mixing up the valve springs for the intake and exhaust valves.

Color marking (1) is normally on lower end of valve spring.

Only the diameter pointing to the spring retainer at the bottom is required for correct installation of the valve spring.

Fig 3: Valve Spring And Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Valve
Valve stem seal with spring plate, bottom
Valve spring
Top plate spring
Valve tapers

Fig 4: Valve Spring, Upper Spring Plate, Valve Tapers And Valve
Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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