11 31 028 Removing And Installing/Replacing Exhaust Camshaft (N51)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2013 BMW 128i, 2012 BMW 128i, 2011 BMW 128i, 2010 BMW 128i, and 2009 BMW 128i. 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 -- 128I .

00 9 120

For the following special tools, refer to ENGINE - SPECIAL TOOLS (N51) .

11 4 350
11 4 461
11 4 462
11 4 463
11 9 000

IMPORTANT: It is absolutely essential to follow an exact procedure for removing and installing the exhaust camshaft.
Risk of damage!
The upper and lower bearing banks must be pretensioned with a total of six special tools 11 4 461.

Necessary preliminary tasks:

Remove cylinder head cover. See 11 12 000 REMOVING AND INSTALLING OR SEALING CYLINDER HEAD COVER (N51) .
Remove exhaust adjusting 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.

Remove upper bearing bank (1).

Remove exhaust camshaft from lower bearing bank.

Fig 1: Identifying Lower And Upper Bearing Banks With Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

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

A Exhaust camshaft.

E Inlet camshaft.

Fig 2: Identifying Exhaust Camshaft 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 3: Identifying Compression Rings

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IMPORTANT: Removal on engine:
Set engine to firing TDC at 1st cylinder.
Removed cylinder head:
When using special tool 11 9 000, it will be necessary to remove the aluminum profile insert.

Installing camshaft bearing bank:

Pre-install special tool 11 4 462 on cylinder 2.

Insert special tool 11 4 463 in screw connection of cylinder head cover.

IMPORTANT: Special tool 11 4 463 is a special screw.

Press down roller rocker arms (3) on 2nd cylinder with spindle nut (2) of special tool 11 4 462.

Fig 4: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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

Refer to 11 33 050 REMOVING AND INSTALLING/REPLACING ALL ROCKER ARMS (N51) .

Fig 5: Identifying Roller Rocker Arm

Courtesy of BMW OF NORTH AMERICA, INC.

Position lower bearing bank (1) with exhaust camshaft (2) on roller rocker arms.

Align exhaust camshaft (2).

Cylinders 2 and 4 are at overlap.

Cams (3) on 1st cylinder point upwards at an angle.

Part number (4) points upwards.

Fig 6: Identifying Lower Bearing Bank With Exhaust Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Join exhaust camshaft to lower and upper bearing banks (1) with torque wrench (2) from inside outwards to 8 Nm .

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

Fig 7: Identifying Lower And Upper Bearing Banks

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

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 4 461 into contact at milled surfaces.

Fig 8: Identifying Upper Bearing Banks Surface

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Schematic depiction of special tool 11 4 461 at lower bearing bank (1) and upper bearing bank (2).
Pretension all special tools 11 4 461 with special tool 11 4 350 only. See Fig 10.

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

Fig 9: Identifying Special Tools

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Position special tool 11 4 461 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 10: Identifying Special Tool (11 4 461)

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Initially tighten screw of special tool 11 4 461 to ground surfaces of lower bearing bank (1) and upper bearing bank (2).

IMPORTANT: Tighten screws on thrust piece to 2 Nm (risk of damage).

Fig 11: Tightening Screws On Thrust Piece

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IMPORTANT: Set special tool 11 4 350 to 2 Nm .
Pretension all special tools 11 4 461 with special tool 11 4 350 only.

Fig 12: Identifying Special Tool

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Mount special tools 11 4 461 with screw (1) to inside of cylinder head.

On cylinder 2 mount special tool 11 4 461 with screw (1) facing outwards.

Position special tools 11 4 461 so that screw connections (2) of bearing bank are easily accessible.

Fig 13: Identifying Special Tools

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

Tightening torque. See 11 31 1AZ in

IMPORTANT: Remove special tool 11 4 461 only when camshaft screw connection is completed .

Fig 14: Tightening Lower And Upper Bearing Banks With Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.