11 34 055 Replacing all valve springs (B48B)

WARNING: This page is about a different car, the 2018 BMW 330i and 2017 BMW 330i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

11 9 001
00 2 300
11 9 006
11 9 007
11 9 008
11 9 005
11 9 000
11 9 009
11 9 017
11 9 011
11 4 480

Necessary preliminary work:

Remove CYLINDER HEAD .
Remove ALL ROCKER ARMS .

Removal:

Mount and bolt cylinder head on special tools 11 9 001 and 00 2 300 .

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Prepare special tools 11 9 006 , 11 9 007 and 11 9 008 as pictured.

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NOTE: Special tools 11 9 008 must be positioned accordingly in the next operation.

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Turn special tool 11 9 006 over and insert as pictured.

Lock special tool 11 9 005 in the direction of the arrow.

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Lock special tool 11 9 005 in the direction of the arrow.

Rotate cylinder head, using special tool 11 9 000 , 180° into installation position.

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Align special tool 11 9 009 in direction of valve axis. Select corresponding groove with special tool 11 9 017 .

Press down valve spring on upper spring cup with special tools 11 9 009 and 11 9 017 .

Valve spring can be held in pressed-down position with special tool 11 9 011 .

NOTE: Illustration shows B48A engine.

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Keep valve spring pressed down with special tool 11 9 017 .

Use a magnet to remove valve keys (1) from valve (2).

Relieve load on valve spring. Remove valve spring and spring cup.

Set down valve spring, spring cup and valve keys in special tool 11 4 480 in an orderly manner.

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Installation:

IMPORTANT: Incorrect assembly possible.
Incorrect installation will result in valve spring breakage.
Risk of mixing up the valve springs for the inlet and exhaust valves.

Valve springs are marked in color (1).

Color for the intake valves:

Grass green

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Install the valve spring so that the larger diameter (Y) points to the bottom spring cup.

IMPORTANT: Incorrect assembly possible.
Incorrect installation will result in valve spring breakage.
Risk of mixing up the valve springs for the inlet and exhaust valves.

Valve springs are marked in color (1).

Color for the exhaust valves:

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Grass green/lemon yellow

Install the valve spring so that the larger diameter (Y) points to the bottom spring cup.

If necessary, replace VALVE STEM SEALS .

Installation sequence:

Valve
Valve stem seal
Valve spring
Top spring cup
Valve keys

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Align special tool 11 9 009 in direction of valve axis. Select corresponding groove with special tool 11 9 017 .

Press down valve spring on upper spring cup with special tools 11 9 009 and 11 9 017 .

Valve spring can be held in pressed-down position with special tool 11 9 011 .

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Keep valve spring pressed down with special tool 11 9 017 .

Use a magnet to install valve keys (1) on valve (2).

Relieve load on valve spring.

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Unlock special tool 11 9 005 .

Remove special tool 11 9 006 .

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Remove cylinder head from special tools 11 9 001 and 00 2 300 .

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Required follow-up work:

Installing the CYLINDER HEAD
Install ALL ROCKER ARMS
Assemble engine