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11 34 715 Replacing all valve springs (N52T)

Special tools required: 

Necessary preliminary work: 

Place cylinder head on special tool 11 9 000 .

Press down inlet valves  with special tool 11 9 017 .

Press down outlet valves  with special tool 11 0 346 .

Fig 1: Pressing Inlet Valves
G04751210Courtesy of BMW OF NORTH AMERICA, INC.

Remove valve keys with a magnet.

Remove valve spring with spring cups.

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 Spring
G04207672Courtesy 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 inlet 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 cup.

Fig 3: Identifying Valve Spring Mark
G04740095Courtesy of BMW OF NORTH AMERICA, INC.

Arrangement:

  1. Valve
  2. Valve stem seal with lower spring cup
  3. Valve spring
  4. Upper spring cup
  5. Valve keys
    Fig 4: Identifying Valve Components
    G04740096Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

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

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