11 31 025 Removing and installing or replacing intake camshaft

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2010 BMW 535xi, 2010 BMW 535i, 2009 BMW 535xi, 2009 BMW 535i, and 2008 BMW 535xi. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

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 intake 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: Lifting Out Lower And Upper Bearing Banks With Camshaft

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Remove upper bearing shell.

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

Fig 2: Identifying Intake Camshaft With Mark

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

A Exhaust camshaft.

E Intake camshaft

Fig 3: Identifying Exhaust And Intake Camshaft Identifications Marks

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Metal plain rectangular compression ring:

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

Only replace plain rectangular compression rings (1) when they are broken.

The plain rectangular compression rings have catches at the joint.

Press the plain rectangular compression rings (1) apart forwards and towards the rear and remove towards the front.

Make sure plain rectangular compression rings (1) can move freely.

Installation note:

When intake camshafts are inserted, no joint must point to a separating joint.

Fig 4: Pressing Plain Compression Rings

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Graphic shows N12 engine

Plastic plain rectangular compression ring:

Installation note:

The plastic plain rectangular compression ring is maintenance free and does not have to be replaced.

Insert plastic rectangular compression ring (1) into groove of intake camshaft (2) (see arrow).

Lightly oil plastic rectangular compression ring (1) and rotate in direction of arrow until compression ring (1) is positioned on the intake camshaft.

Make sure plain rectangular compression ring (1) can move freely.

Fig 5: Inserting Plastic Rectangular Compression Ring Into Groove Of Intake Camshaft

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IMPORTANT: Removal on engine:
Set engine to ignition TDC at cylinder No. 1.
Removed cylinder head:
When using special tool 11 9 000 (cylinder head clamping device), it will be necessary to remove the aluminium profile insert.

Installing camshaft bearing strip:

Pre-install special tool 11 8 551 on cylinders 2 and 3.

Insert special tool 11 8 552 in screw connection of cylinder head cover.

Special tool 11 8 551 is marked with letters E and A.

E = intake side.

A = exhaust side.

Press down roller cam followers on 3rd cylinder with spindle nut (2) of special tool 11 8 551 .

Fig 6: Identifying Special Tools With Mark Letters E And A

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Installation note:

Before installing intake camshaft, make sure roller cam follower is correctly seated on HVCA element and valve.

Fig 7: Installing Roller Cam Follower On HVCA Element And Valve

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Installation note:

Pre-install bearing strip of intake camshaft.

Lubricate all bearing points in lower bearing strip with engine oil.

Installation note:

Lay intake camshaft (1) in bearing strip.

Fig 8: Identifying Intake Camshaft

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Rotate intake camshaft (1) at cylinder No. 1 into position (2).

Fig 9: Rotating Intake Camshaft At Cylinder No. 1

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Installation note:

Lower and upper bearing banks must be aligned to each other at ground surfaces (1 and 2).

Bring thrust piece and legs of special tool 11 8 553 into contact at milled surfaces.

Fig 10: Identifying Lower And Upper Bearing Banks

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NOTE: Schematic depiction of special tool 11 8 553 at lower bearing bank (1) and upper bearing bank (2).

IMPORTANT: Tighten screw (3) on thrust piece to 2 Nm.

Fig 11: Identifying Special Tool (11 8 553), Lower Bearing Bank And Upper Bearing Bank

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Position special tool 11 8 553 over screw connection of bearing banks.

Make sure that legs come into exact contact on ground surfaces, lower bearing bank (1) and upper bearing bank (2).

Fig 12: Positioning Special Tool (11 8 553) Over Screw Connection Of Bearing Banks

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Initially tighten screw of special tool 11 8 553 to ground surfaces of lower bearing bank (1) and upper bearing bank (2).

IMPORTANT: Tighten screws on thrust piece to 2 Nm.

Fig 13: Tightening Screw Of Special Tool (11 8 553) To Ground Surfaces Of Lower Bearing Bank And Upper Bearing Bank

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IMPORTANT: Set special tool 11 4 350 to 2 Nm.
Pretension all special tools 11 8 553 with special tool 11 4 350 only.

Fig 14: Identifying Special Tool (11 4 350)

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Install upper and lower bearing strips (1).

Pre-install all special tools 11 8 553 .

IMPORTANT: Secure special tool 11 8 553 to MAX 2 Nm.

Fig 15: Identifying Upper And Lower Bearing Strips With Special Tools (11 8 553)

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Install intake camshaft with bearing strips (1) on cylinder head.

Fig 16: Identifying Intake Camshaft With Bearing Strips On Cylinder Head

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Check position of intake camshaft (1) at 6th cylinder.

Roller cam follower (2) is not actuated.

Fig 17: Identifying Intake Camshaft And Cam Follower

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Tighten lower and upper bearing banks with special tool 00 9 120 .

Tightening torque: 11 31 1AZ .

IMPORTANT: Remove special tool 11 8 553 only when camshaft screw connection is completed .

Fig 18: Tightening Lower And Upper Bearing Banks With Special Tool (00 9 120)

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Adjust VALVE TIMING .

Assemble engine.