11 34 715 Replacing all valve springs (N12)

WARNING: This page is about a different variant/trim than selected.

Special tools required:

11 4 480
11 9 000
11 9 006
11 9 007
11 9 017

Necessary preliminary tasks:

Place cylinder head (1) on special tool 11 9 000.

Fig 1: Identifying Cylinder Head And Special Tool (11 9 000)

G05515646

Courtesy of BMW OF NORTH AMERICA, INC.

Prepare special tool 11 9 007 on special tool 11 9 006.

Fig 2: Identifying Special Tools (11 9 007 And 11 9 006)

G05515647

Courtesy of BMW OF NORTH AMERICA, INC.

Align special tool 11 9 006.

Lock eccentrics (1) on special tool 11 9 000 in direction of arrow.

Fig 3: Locking Eccentrics On Special Tool (11 9 000)

G05515648

Courtesy of BMW OF NORTH AMERICA, INC.

Press down valve spring and spring retainer (1) with special tool 11 9 017.

Fig 4: Identifying Spring Retainer With Special Tool (11 9 017)

G05515649

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 in a tidy and orderly fashion.

Fig 5: Removing Valve Spring And Spring Retainer

G04725558

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Incorrect installation possible.
Incorrect installation will result in valve spring breakage.

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 6: Identifying Color Marking On Lower End Of Valve Spring

G04725559

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Fig 7: Identifying Valve And Valve Spring Components

G05515652

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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