11 34 715 Replacing all valve springs (N52K)

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:

Remove Cylinder Head
Remove 11 31 028 Removing and installing/replacing exhaust camshaft (N52K) .
Remove Intermediate Lever
Remove intake camshaft
Remove Cam Followers

Place cylinder head on special tool 11 9 000.

Press down intake valves with special tool 11 9 017.

Press down 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.

If the individual components are to be reused, they must be placed in neat order in special tool 11 4 480.

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.

The valve spring is color-coded (1) at the lower end.

Install the valve spring so that the larger diameter points to the lower spring plate.

Fig 3: Valve Spring And Dimension

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

Valve
Valve stem seal with lower spring plate
Valve spring
Upper spring plate
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.