11 31 034 Removing and installing/replacing right inlet camshaft (N62 from 9/03): 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 of screw (2), see ENGINE - TIGHTENING TORQUES .

Fig 2: Fitting Sensor Gear And Aligning 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 3: Installing Compression Rings

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

Fig 4: Inserting 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 5: Installing Bearing Shells Of Eccentric Shaft In Bearing Bracket

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

Fig 6: Identifying Dowel Sleeves For Checking

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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 7: Installing Bearing Caps

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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: Securing Bearing Bracket And Bearing Cap With Nut (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 illustration and align inlet camshaft.

Fig 9: Fitting Special Tool 11 9 472 And Aligning Inlet Camshaft

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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: Fitting Centering Sleeves (Special Tool 11 9 475)

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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: Inserting Special Tool 11 9 474

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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: Installing Torsion Spring

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Insert screw (1) and tighten down.

Fig 13: Tightening Torsion Spring 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 Lever