11 34 715 Replacing All Valve Springs (N52K)

Special tools required: 

For the following special tools, refer to ENGINE- SPECIAL TOOLS (N52K) .

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

Necessary preliminary tasks: 

• Remove cylinder head  . See 11 12 100 REMOVING AND INSTALLING CYLINDER HEAD (N52K) .
• Remove exhaust camshaft.  See 11 31 028 REMOVING AND INSTALLING/REPLACING EXHAUST CAMSHAFT (N52K) .
• Remove intermediate lever  . See 11 37 010 REMOVING AND INSTALLING/REPLACING INTERMEDIATE LEVERS (N52K) .
• Remove inlet camshaft  . See 11 31 025 REMOVING AND INSTALLING/REPLACING INLET CAMSHAFT (N52K) .
• Remove cam followers  . See 11 33 050 REMOVING AND INSTALLING/REPLACING ALL ROCKER ARMS (N52K) .

Place cylinder head on special tool 11 9 000. 

Press down inlet valves  with special tool 11 9 017. 

Press down exhaust valves  with special tool 11 0 346. 

Fig 1: Identifying 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 With Magnet

Courtesy of BMW OF NORTH AMERICA, INC.

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: Identifying Valve Spring Color Coded

Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

1. Valve
2. Valve stem seal with lower spring plate
3. Valve spring
4. Upper spring plate
5. Valve tapers
   Fig 4: Identifying Valve, Valve Stem Seal With Lower Spring Plate, Valve Spring And Valve Tapers

   Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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