11 31 025 Removing And Installing Or Replacing Inlet Camshaft (N54): Notes

WARNING: This page is about a different car, the 2010 BMW 135i, 2009 BMW 135i, and 2008 BMW 135i. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

For the following special tools, refer to MAINTENANCE AND GENERAL INFORMATION - SPECIAL TOOLS .

00 9 120

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

11 4 350
11 8 550
11 8 551
11 8 552
11 8 553
11 9 000

IMPORTANT: Risk of damage!
It is absolutely essential to follow an exact procedure for removing and installing the exhaust camshaft.
The upper and lower bearing banks must be tensioned with a total of six special tools 11 8 553.
Special tool 11 8 550 can be used for inlet and exhaust sides.

Necessary preliminary tasks:

Remove cylinder head cover .
Remove inlet adjustment unit of inlet camshaft.

Release bearing cap screw connections from outside inwards.

Lift out lower and upper bearing banks (1) with camshaft.

NOTE: Illustration shows N52.

Fig 1: Releasing Bearing Cap Screw Connections

Courtesy of BMW OF NORTH AMERICA, INC.

Remove upper bearing shell.

Remove inlet camshaft (1) marked with (E).

Fig 2: Identifying Inlet Camshaft Marked

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Both camshafts have different markings.
Mixing up the two camshafts will result in engine damage .

A Exhaust camshaft

E Inlet camshaft

Fig 3: Identifying Exhaust And Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Check plain compression rings (1) for damage and replace if necessary.

Plain compression rings (1) are engaged at joint.

Press plain compression rings (1) apart upwards and downwards and removed towards front.

IMPORTANT: Plain compression rings (1) can easily break.

Fig 4: Pressing Plain Compression Rings

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT: Removal on engine: Engine at cylinder no. 1 firing TDC position. Removed cylinder head: When using special tool 11 9 000, it will be necessary to remove the aluminum profile insert.