11 31 034 Removing And Installing/Replacing Right Inlet Camshaft (N62 From 9/03 And N62TU): 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 1: 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. See ENGINE - TIGHTENING TORQUES -- ALPINA .

Fig 2: Identifying Sensor Gear And Screw

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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 3: Identifying Compression Ring Groove

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

Fig 4: Identifying Inlet Camshaft And Cam Lobe

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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 5: Identifying Bearing Shell

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

Fig 6: Identifying Dowel Sleeves

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

Fit bearing caps L E2 to L E5.

Fig 7: Identifying Bearing Caps Numbers

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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 8: Identifying Special Tool (11 9 473)

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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 graphic and align inlet camshaft.

Fig 9: Identifying Special Tools

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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 10: Identifying Special Tools (11 9 475) And (11 9 472)

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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 11: Identifying Special Tools (11 9 474) And (11 9 472)

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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 12: Identifying Torsion Spring And Special Tool

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Insert screw (1) and tighten down.

Fig 13: Identifying 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 14: Identifying Intermediate Levers

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

Remove special tool 11 9 490.

Fig 15: Identifying Special Tools

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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 16: Identifying Torsion Spring And Intermediate Lever

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

Remove special tool 11 9 490.

Fig 17: Identifying Torsion Spring With Special Tool

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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 18: Identifying Torsion Spring And Intermediate Lever

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Install eccentric shaft sensor (2).

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

Fig 19: Identifying Eccentric Shaft Sensor

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Remove special tool 11 9 474.

Fig 20: Identifying Special Tool (11 9 474)

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

Fig 21: Identifying Special Tools (11 9 472) And (11 9 475)

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Ends of compression rings (1) point upwards.

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

Fig 22: Identifying Ends Of Compression Rings Point

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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 rockers (1) straight.

Fig 23: Identifying Rocker Arms