Replacing all valve springs (S55 engine)

Special tools required: 

• 11 9 000
• 11 9 007
• 11 8 840
• 11 4 481
• 11 4 482

Necessary preliminary tasks: 

• Remove CYLINDER HEAD .
• Remove EXHAUST CAMSHAFT .
• Remove INTERMEDIATE LEVER .
• Remove INTAKE CAMSHAFT .
• Remove ROCKER ARM .

Place cylinder head on special tool 11 9 000.

Align special tool 11 9 007 on particular combustion chamber.

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Position special tool 11 9 007 on cylinder head.

Push locks (1 and 2) toward inside and preload via eccentric shaft.

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Press down intake valve  with special tool 11 8 840.

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Remove valve key (1) with a magnet.

Remove valve spring with spring cups.

If individual components are to be reused, they must be placed in neat order in special tool 11 4 481.

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Press down exhaust valve  with special tool 11 8 840.

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Remove valve key (1) with a magnet.

Remove valve spring with spring cups.

If individual components are to be reused, they must be placed in neat order in special tool 11 4 482.

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Valve springs are marked in color (1).

Colors for intake valves:

• Green/blue
• Yellow/Blue

Colors for discharge valves:

• Green/white
• Yellow/white

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

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Arrangement:

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

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Assemble engine.

Check function of DME.