11 31 034 Removing and installing/replacing right inlet camshaft (N62 from 9/03 and N62TU): Removal

WARNING: This page is about a different car, the 2005 BMW 645Ci and 2004 BMW 645Ci. However, it is still accessible from the selected car via links, so may be relevant.

Removal of inlet camshaft is described separately from installation.

Remove servomotor for right eccentric shaft. Refer to 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62) .

Remove ignition coils on cylinder bank 1 to 4.

Remove right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING / SEALING RIGHT CYLINDER HEAD COVER (N62 / N62TU) .

Remove spark plugs on cylinder bank 1 to 4.

Remove inlet and exhaust adjustment unit on right side. Refer to 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62) .

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: Aligning Cam For 1st Cylinder Horizontally

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IMPORTANT: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

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: Identifying Bearing Cap L E1

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

Fig 3: Locating Nuts Of Bearing Bracket

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

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

Fig 4: Identifying Rocker Arm

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IMPORTANT: Rockers 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.

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 vise.

Fig 5: Clamping Support In Vise

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IMPORTANT: Do not tilt bearing bracket (1).

Carefully lift out bearing bracket (1).

Fig 6: View Of Bearing Bracket

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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: Securing Bearing Bracket With Nut

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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 Lower Section Of Bearing Bracket

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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: Locating Eccentric Shaft Sensor And Retaining Screws

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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.

Fig 10: Raising One End Of Torsion Spring With Lever

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

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: Attaching Holder Sleeve To End Of Torsion Spring

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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: Identifying Intermediate Lever Tolerance Class Number

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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: Raising Second End Of Torsion Spring With Lever

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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: Attaching Holder Sleeve To Second End Of Torsion Spring

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Release screw (1).

Fig 15: Releasing Screw

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

Fig 16: Removing Torsion Spring And Holder Sleeve

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Remove the 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: Unscrewing Knurled Nut

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IMPORTANT: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

NOTE: Bearing caps are marked as illustrated 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 Caps L E2 To L E5

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Lift out inlet camshaft (1).

Fig 19: View Of Inlet Camshaft

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NOTE: Further tasks: The article 11 37 008 REMOVING AND INSTALLING/REPLACING RIGHT ECCENTRIC SHAFT (N62 FROM 9/03) 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: Removing Compression Ring

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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: Removing Sensor Gear And Retaining Screw

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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: Identifying Camshaft Groove

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

Insert screw (2) and tighten down.

Tightening torque of screw (2), refer to 11 31 14AZ in ENGINE - TIGHTENING TORQUES .

Fig 23: Aligning Sensor Gear To Groove In Camshaft

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Installing 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: Installing Compression Rings

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

Fig 25: Aligning Inlet Camshaft

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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 Shells Alignment

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

Fig 27: Locating Dowel Sleeves

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NOTE: Bearing caps are marked as illustrated with L E2 to L E5.

Fit bearing caps L E2 to L E5.

Fig 28: View Of Bearing Caps L E2 to L E5

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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: Tightening Knurled Nut

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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 illustration and align inlet camshaft.

Fig 30: Aligning Inlet Camshaft In Support

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

Fig 31: Locating Centering Sleeves

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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: View Of Guide Bushes

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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: Installing Torsion Spring

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Insert screw (1) and tighten down.

Fig 34: Inserting Screw

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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: Identifying Intermediate Lever Tolerance Class Number

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

Fig 36: Raising Torsion Spring With Holder Sleeve

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Detach special tool 11 9 490.

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: Installing Intermediate Lever

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

Detach special tool 11 9 490.

Fig 38: Detaching Holder Sleeve

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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: Inserting End Of Torsion Spring Into Guide On Intermediate Lever

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Install eccentric shaft sensor (2).

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

Fig 40: Identifying Eccentric Shaft Sensor And Retaining Screws

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Remove special tool 11 9 474.

Fig 41: Removing Retaining Screws

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

Fig 42: Removing Special Tool 11 9 472 And Special Tool 11 9 475

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Ends of compression rings (1) point upwards.

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

Fig 43: Identifying Compression Rings Engaged Ends

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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 rocker arms (1) straight.

Fig 44: Aligning Rocker Arms

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Remove special tool 11 9 473.

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

Fig 45: Removing Knurled Nut

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IMPORTANT: Do not tilt bearing bracket (1).

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

Fig 46: Locating Bearing Bracket Nuts

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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, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES .

IMPORTANT: Do not mix up the camshaft bearing covers of cylinders 1 to 4 and 5 to 8.

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

Fig 47: View Of Bearing Cap L E1

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Install nuts and tighten down.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES .

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

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

Fig 48: Identifying Marking On Hexagon Drive Of Inlet Camshaft

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Install inlet and exhaust adjustment unit on right side. Refer to 11 36 048 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON RIGHT SIDE (N62) .

Install spark plugs on cylinder bank 1 to 4.

Install right cylinder head cover. Refer to 11 12 006 REMOVING AND INSTALLING / SEALING RIGHT CYLINDER HEAD COVER (N62 / N62TU) .

Install ignition coils on cylinder bank 1 to 4.

Install servomotor for right eccentric shaft. Refer to Refer to 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62) .

Assemble engine.