11 34 715 Replacing all valve springs (N52K)

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.

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.

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.

Arrangement:

1. Valve
2. Valve stem seal with lower spring plate
3. Valve spring
4. Upper spring plate
5. 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.