1134715 Replacing all valve springs (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2010 BMW 328xi, 2010 BMW 328i, and 2009 BMW 328xi. However, it is still accessible from the selected car via links, so may be relevant.

Necessary preliminary tasks:

Place cylinder head on special tool 11 9 000 DEVICE .

Press down inlet valves with special tool 11 9 017.

Exhaust valves with special tool 11 0 346

Fig 1: Pressing Down Inlet Valves Using Special Tool (11 9 017)

G04751210

Courtesy of BMW OF NORTH AMERICA, INC.

Remove valve tapers with a magnet.

Remove valve spring and spring retainer.

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

Fig 2: Removing Valve Spring

G04207672

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage.
Risk of mixing up inlet and exhaust springs.

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: Identifying Color Marking On Lower End Of Valve Spring

G04740095

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: Exploded View Of Valve Assembly

G06902428

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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