11 31 034 Removing And Installing/Replacing Right Inlet Camshaft (N62 From 9/03 And N62TU)

Special tools required:

(cylinder bank 1 to 4)

Necessary preliminary tasks:

Remove SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT
Remove ignition coils on cylinder bank 1 to 4
Remove RIGHT CYLINDER HEAD COVER
Remove spark plugs on cylinder bank 1 to 4
Remove RIGHT INLET AND EXHAUST ADJUSTMENT UNITS

IMPORTANT:

The inlet camshaft must first be rotated so that when the bearing bracket is removed the intermediate levers do not slip out and damage the camshaft.

Rotate inlet camshaft in direction of rotation until cam on 1st cylinder is positioned horizontally as shown in illustration.

Fig 1: Locating Inlet Camshaft Position

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

NOTE:

Bearing caps of inlet camshaft are marked on cylinder bank 1 to 4 with L E1 to L E5 from inlet side.

Release nuts and remove bearing cap L E1.

Fig 2: Locating Bearing Cap Marks

Courtesy of BMW OF NORTH AMERICA, INC.

Release 8 nuts of bearing bracket (1) from outside to inside.

Fig 3: Locating Bearing Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Rocker arms are freely accessible after bearing bracket has been removed.

Do "not" remove rocker arm (1) on inlet side.

IMPORTANT:

Rocker arms (1) are divided into individual tolerance classes.

The tolerance classes are designated as illustrated with the numbers from 1 to 4.

Used rocker arms (1) may only be reused in the same position.

Fig 4: Locating Rocker Arms On Inlet Side

Courtesy of BMW OF NORTH AMERICA, INC.

When replacing rocker arms (1) on inlet side: install rocker arms of the same tolerance class in the same position.

Clamp special tool 11 9 470 as illustrated in a vice.

Fig 5: Identifying Special Tool (11 9 470)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Do not tilt bearing bracket (1).

Carefully lift out bearing bracket (1).

Fig 6: Identifying Tilt Bearing Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Place bearing bracket (1) with inlet camshaft and eccentric shaft as illustrated on special tool 11 9 470.

Secure bearing bracket (1) with a nut (special tool 11 9 473).

Fig 7: Identifying Special Tools (11 9 473) And (11 9 470)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

The lower section of the bearing bracket (1) is machined with the cylinder head and must not be mixed up.

NOTE:

Lower section of bearing bracket (1) remains on cylinder head.

Fig 8: Identifying Bearing Bracket Lower Section

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

This work step will only be necessary if after the inlet camshaft has been removed the eccentric shaft is also to be removed.

If necessary, remove eccentric shaft sensor (2).

Fig 9: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Removal of the intermediate levers and torsion springs is described on the 4th cylinder. The same procedure is applicable to cylinders 1 to 3.

Raise one end of torsion spring (1) with special tool 11 9 480.

Lift out intermediate lever (2) and set down in an orderly fashion.

IMPORTANT:

Keep holding torsion spring (1) with special tool 11 9 480.

Fig 10: Identifying Torsion Spring And Intermediate Lever

Courtesy of BMW OF NORTH AMERICA, INC.

Attach special tool 11 9 490 to end of torsion spring.

Support end of torsion spring protected with special tool 11 9 490 on inlet camshaft.

Fig 11: Identifying Special Tool (11 9 480) And (11 9 490)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Intermediate levers (2) are divided into individual tolerance classes.

Only intermediate levers of the same tolerance class may be fitted in a single cylinder head.

The tolerance classes are designated as illustrated with the numbers from 1 to 5.

Used intermediate levers (2) may only be reused in the same position.

Fig 12: Locating Intermediate Levers

Courtesy of BMW OF NORTH AMERICA, INC.

Raise second end of torsion spring (1) with special tool 11 9 480.

Lift out intermediate lever (2) and set down in an orderly fashion.

IMPORTANT:

Keep holding torsion spring (1) with special tool 11 9 480.

Fig 13: Holding Torsion Spring With Special Tool (11 9 480)

Courtesy of BMW OF NORTH AMERICA, INC.

Attach special tool 11 9 490 to second end of torsion spring.

Support end of torsion spring protected with special tool 11 9 490 on inlet camshaft.

Fig 14: Identifying Special Tool (11 9 480) And (11 9 490)

Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (1).

Fig 15: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Remove torsion spring (1) and special tool 11 9 490.

Fig 16: Identifying Torsion Spring And Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

Remove intermediate levers and torsion springs of cylinders 1 to 3 according to the same procedure and set down in an orderly fashion.

Unscrew nut (special tool 11 9 473).

Fig 17: Identifying Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

NOTE:

Bearing caps are marked in graphic with L E2 to L E5.

Remove bearing caps L E2 to L E5 and place to one side in order.

Fig 18: Identifying Bearing Cap Marks

Courtesy of BMW OF NORTH AMERICA, INC.

Lift out inlet camshaft (1).

Fig 19: Identifying Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Further tasks:

The section REMOVING AND INSTALLING RIGHT ECCENTRIC SHAFT contains important installation instructions.

If necessary, replace plain compression rings (1).

IMPORTANT:

Plain compression rings (1) can easily break.

Plain compression rings (1) are engaged at joint.

Press compression ring (1) on one side into groove, pull up on other side and remove catch.

Carefully pull compression ring (1) apart and remove towards front.

Fig 20: Identifying Compression Rings

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Inlet camshaft of cylinder bank 1 to 4 is marked with "EIN 14".

If necessary, replace sensor gear (1).

Release screw (2) and remove sensor gear (1).

Fig 21: Identifying Sensor Gear And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installation

Installation of inlet camshaft is described separately from removal.

Clean all bearings and cams of inlet camshaft and lubricate with engine oil.

NOTE: Camshaft has a groove and sensor gear has a lug for fastening purposes.

Fig 22: Locating Sensor Lug

Courtesy of BMW OF NORTH AMERICA, INC.

Fit sensor gear (1) and align to groove in camshaft.

Insert screw (2) and tighten down.

Tightening torque: 11 31 14AZ . See CAMSHAFT for specs.

Fig 23: Identifying Sensor Gear And Screw

Courtesy of BMW OF NORTH AMERICA, INC.

Installing plain compression rings (1):

IMPORTANT:

Plain compression rings (1) can easily break.

Carefully pull compression ring (1) apart and install from front.

Press compression ring (1) on one side into groove, install catch on other side.

Fig 24: Identifying Compression Ring

Courtesy of BMW OF NORTH AMERICA, INC.

Insert inlet camshaft (1) so that cams point upwards at 4th cylinder as shown in graphic.

Fig 25: Identifying Inlet Camshaft

Courtesy of BMW OF NORTH AMERICA, INC.

Make sure bearing shells (1) of eccentric shaft are engaged in bearing bracket.

NOTE:

Bearing shell (1) is guided in a groove in bearing cap.

Fig 26: Identifying Bearing Shell

Courtesy of BMW OF NORTH AMERICA, INC.

Check dowel sleeves (1) for damage and correct installation position.

Fig 27: Identifying Dowel Sleeves

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Bearing caps are marked in graphic with L E2 to L E5.

Fit bearing caps L E2 to L E5.

Fig 28: Identifying Bearing Caps Marks

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Initially tighten special tool 11 9 473 without play only.

Secure bearing bracket and bearing cap with nut (special tool 11 9 473).

Fig 29: Identifying Special Tool

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

The mounting of the bearing bracket described later can only be performed if the first bearing of the inlet camshaft is aligned with special tool 11 9 472.

Fit special tool 11 9 472 as shown in graphic and align inlet camshaft.

Fig 30: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Fit centering sleeves (special tool 11 9 475) and align special tool 11 9 472 to bearing caps 2 and 3.

Fig 31: Identifying Special Tools

Courtesy of BMW OF NORTH AMERICA, INC.

Insert special tool 11 9 474 and initially tighten without play.

NOTE:

Special tools 11 9 472, 11 9 474 and 11 9 475 remain fitted until all torsion springs and intermediate levers have been installed.

Fig 32: Identifying Special Tools For Torsion Springs

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE:

Installation of the intermediate levers and torsion springs is described on the 4th cylinder.

The same procedure is applicable to cylinders 1 to 3.

Attach special tool 11 9 490 to ends of torsion spring.

Install torsion spring (1).

Fig 33: Identifying Torsion Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Insert screw (1) and tighten down.

Fig 34: Identifying Screw

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Intermediate levers (2) are divided into individual tolerance classes.

Only intermediate levers of the same tolerance class may be fitted in a single engine.

The tolerance classes are designated as illustrated with the numbers from 1 to 5.

Used intermediate levers (2) may only be reused in the same position.

Lubricate all sliding surfaces on intermediate lever (2) with engine oil.

Fig 35: Locating Intermediate Levers

Courtesy of BMW OF NORTH AMERICA, INC.

Raise torsion spring (1) with special tool 11 9 480.

Remove special tool 11 9 490.

Fig 36: Identifying Special Tool (11 9 480) And (11 9 490)

Courtesy of BMW OF NORTH AMERICA, INC.

Hold torsion spring (1) with special tool 11 9 480.

Install intermediate lever (2) from above.

Insert end of torsion spring (1) into guide on intermediate lever (2).

Fig 37: Holding Torsion Spring With Special Tool (11 9 480)

Courtesy of BMW OF NORTH AMERICA, INC.

Raise second end of torsion spring with special tool 11 9 480.

Remove special tool 11 9 490.

Fig 38: Identifying Special Tool (11 9 480) And (11 9 490)

Courtesy of BMW OF NORTH AMERICA, INC.

Hold torsion spring (1) with special tool 11 9 480.

Install intermediate lever (2) from above.

Insert end of torsion spring (1) into guide on intermediate lever (2).

Fig 39: Identifying Intermediate Lever And Torsion Spring

Courtesy of BMW OF NORTH AMERICA, INC.

Install eccentric shaft sensor (2).

Insert screws and tighten down eccentric shaft sensor (2).

Fig 40: Identifying Eccentric Shaft Sensor

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 9 474.

Fig 41: Identifying Special Tool (11 9 474) And (11 9 472)

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 9 472 and special tool 11 9 475.

Fig 42: Identifying Special Tools (11 9 475) And (11 9 472)

Courtesy of BMW OF NORTH AMERICA, INC.

Ends of compression rings (1) point upwards.

Make sure compression rings (1) are engaged at ends.

Fig 43: Identifying Compression Rings

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Rocker arms (1) slip slightly when bearing bracket is fitted.

Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

Align rockers (1) straight.

Fig 44: Identifying Rocker Arms On Inlet Side

Courtesy of BMW OF NORTH AMERICA, INC.

Remove special tool 11 9 473.

Remove bearing bracket (1) from special tool 11 9 470.

Fig 45: Identifying Special Tools (11 9 473) And (11 9 470)

Courtesy of BMW OF NORTH AMERICA, INC.

IMPORTANT:

Do not tilt bearing bracket (1).

Lower bearing bracket (1) from above and carefully bring into contact with cylinder head.

Insert nuts and tighten by hand without play.

IMPORTANT:

Make sure none of the intermediate levers or rocker arms have slipped out.

Tighten down nuts from inside to outside.

Tightening torque: 11 31 1AZ . See CAMSHAFT for specs.

IMPORTANT:

Camshaft bearing caps of cylinders 1 to 4 and 5 to 8 must not be mixed up.

Fig 46: Locating Bearing Bracket

Courtesy of BMW OF NORTH AMERICA, INC.

Fit bearing cap L E1 in such a way that marking is legible from inlet side.

Install nuts and tighten down.

Tightening torque: 11 31 1AZ . See CAMSHAFT for specs.

Fig 47: Locating Bearing Cap Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Rotate inlet camshaft at hexagon head against direction of rotation until cam on 1st cylinder points downwards at an angle as shown in graphic.

NOTE:

The marking (1) on the hexagon drive of the inlet camshaft faces upwards.

Fig 48: Identifying Inlet Camshaft Marking

Courtesy of BMW OF NORTH AMERICA, INC.

Install INLET AND EXHAUST ADJUSTMENT UNIT ON RIGHT SIDE .

Install spark plugs on cylinder bank 1 to 4.

Install RIGHT CYLINDER HEAD COVER .

Install ignition coils on cylinder bank 1 to 4.

Install SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT .

Assemble engine.