11 31 028 Removing and installing or replacing exhaust 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 .

Necessary preliminary tasks:

Remove CYLINDER HEAD COVER .
Remove EXHAUST ADJUSTMENT UNIT for exhaust camshaft.
Adjust VALVE TIMING .

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

A Exhaust camshaft.

E Intake camshaft

Fig 2: 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 exhaust camshafts are inserted, no joint must point to a separating joint.

Fig 3: 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 exhaust 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 exhaust camshaft.

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

Fig 4: Inserting Plastic Rectangular Compression Ring Into Groove Of Intake Camshaft

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IMPORTANT:

Removal on engine:

Engine at cylinder no. 1 firing TDC position.

Removed cylinder head:

When using special tool 11 9 000 (cylinder head clamping device), it will be necessary to remove the aluminium strip.

Installation note:

Before installing exhaust camshaft, make sure roller rocker arm is correctly seated HVCA element and valve.

Fig 5: Installing Roller Cam Follower On HVCA Element And Valve

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Installing camshaft bearing strip:

Pre-install special tool 11 8 551 on cylinder 2.

Observe identification markings E and A

E: intake side.

A: exhaust side.

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

Press down roller cam follower (1) on cylinder No. 2 with spindle nut of special tool 11 8 551 .

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

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Lay lower bearing strip (1) on cylinder head.

Installation note:

Lubricate all bearing points with engine oil.

Fig 7: Identifying Cylinder Head Lower Bearing Strip

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Insert exhaust camshaft (1) in lower bearing bank.

Installation note:

Lubricate all bearing positions and cams with engine oil.

Fig 8: Identifying Exhaust Camshaft

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Installation position (1) of exhaust camshaft (2) at 1st cylinder.

Fig 9: Identifying Installation Position Of Exhaust Camshaft

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Join exhaust camshaft to lower and upper bearing strips with torque wrench from inside outwards to 8 Nm.

Release all screws of bearing bank (1) from outside inwards by 90°.

Check position of exhaust camshaft (2) at 6th cylinder.

Roller cam follower (1) is not actuated.

Fig 10: Identifying Bearing Bank And Exhaust Camshaft

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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 11: Identifying Lower And Upper Bearing Banks

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

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

Fig 12: 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.

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

Fig 13: 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 (2) and upper bearing bank (1).

IMPORTANT: Tighten screws on thrust piece to 2 Nm.

Fig 14: 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 15: Identifying Special Tool (11 4 350)

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Mount special tools 11 8 553 with screw (1) to inside of cylinder head.

On cylinder No. 2 mount special tool 11 8 553 with screw (1) facing outwards.

Position special tools 11 4 350 so that screw connections (2) of bearing bank are easily accessible.

Fig 16: Identifying Special Tools (11 8 553) And (11 4 350)

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

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

Tightening torque: 11 31 1AZ .

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

Fig 17: Tightening Lower And Upper Bearing Banks With Special Tool (00 9 120)

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Assemble engine.