11 31 036 Removing and installing/replacing left exhaust camshaft (N62/N62TU)

(cylinder bank 5 to 8)

Necessary Preliminary Tasks:

Remove servomotor for left eccentric shaft. Refer to 11 37 022 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR LEFT ECCENTRIC SHAFT (N62/N62TU) .

Remove ignition coils on cylinder bank 5 to 8.

Remove left cylinder head cover. Refer to 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N62/N62TU) .

Remove spark plugs on cylinder bank 5 to 8.

Remove inlet and exhaust adjustment unit on left side. Refer to 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON LEFT SIDE (N62/N62TU) .

Remove slide rail (1).

Fig 1: Locating Slide Rail

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Rotate exhaust camshaft at hexagon head until exhaust cam on cylinder (6) is facing upwards.

Fig 2: Aligning Exhaust Cam

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

NOTE: Bearing caps of exhaust camshaft are marked on cylinder bank 5 to 8 with R A1 to R A5 from inlet side.

Release nuts and remove bearing cap R A1.

Fig 3: Identifying Bearing Cap R A1

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NOTE: Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Release nuts on bearing caps R A2 to R A5.

Fig 4: Locating Bearing Caps Retaining Clips

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Remove bearing caps R A2 to R A5.

Fig 5: View Of Bearing Caps R A2 To R A5

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Remove exhaust camshaft (1).

Fig 6: Identifying Exhaust Camshaft

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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 7: View Of Compression Rings

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If necessary, replace sensor gear (1).

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

Fig 8: Locating Sensor Gear Retaining Screw

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Installation:

Installation of exhaust camshaft is described separately from removal. Clean all bearings and cams of exhaust camshaft and lubricate with engine oil.

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

Fig 9: 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, refer to (2) 11 31 14AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 10: Installing Sensor Gear

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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 11: View Of Compression Ring In Groove

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NOTE: Rocker arms (1) of exhaust camshaft are of same design as rocker arms of inlet camshaft.

The classification 3 shown in the illustration has no affect on the function on the exhaust camshaft.

Fig 12: Identifying Rocker Arms

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IMPORTANT: Rocker arms (1) slip slightly when exhaust camshaft is fitted. Make sure rocker arms (1) are secured as illustrated on hydraulic valve clearance compensating elements and on valves.

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

Align rocker arms (1) straight.

Fig 13: View Of Rocker Arms

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Lubricate exhaust camshaft and bearing caps with engine oil.

Install exhaust camshaft (1).

Rotate exhaust camshaft (1) until exhaust cam on cylinder 6 is facing upwards.

Fig 14: Identifying Exhaust Camshaft

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Check dowel sleeves (2) for damage and correct installation position.

Ends of compression rings (1) point upwards.

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

Fig 15: Locating Dowel Sleeves

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

NOTE: Bearing caps of exhaust camshaft are marked on cylinder bank 5 to 8 with R A1 to R A5 from inlet side.

Fit bearing caps R A2 to R A5.

Fig 16: View Of Bearing Caps R A2 To R A5

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NOTE: Retaining clips (1) for oil line are fitted on bearing caps 3 and 5.

Insert nuts and tighten by hand without play.

Tighten down nuts on bearing caps R A2 to R A5 in 1/2 turn increments evenly from inside to outside.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 17: Identifying Retaining Clips For Bearing Caps 3 And 5

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

Fit bearing cap R A1 in such a way that marking is legible from inlet side.

Install nuts and tighten down.

Tightening torque, refer to 11 31 1AZ in ENGINE - TIGHTENING TORQUES - 545I (4.4L) E60 .

Fig 18: View Of Bearing Cap R A1

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NOTE: A gasket (2) is installed between cylinder head and slide rail (1).

Replace gasket (2) and preinstall on slide rail (1).

Fig 19: Locating Slide Rail And Gasket

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Install slide rail (1) with gasket, insert screw and tighten down.

Fig 20: Installing Slide Rail With Gasket

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Rotate exhaust camshaft against direction of rotation until cam on 5th cylinder points upwards at an angle as shown in illustration.

Fig 21: Aligning 5th Cylinder Cam

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Install inlet and exhaust adjustment unit on left side. Refer to 11 36 047 REMOVING AND INSTALLING/REPLACING INLET AND EXHAUST ADJUSTMENT UNITS ON LEFT SIDE (N62/N62TU) .

Install spark plugs on cylinder bank 5 to 8.

Install left cylinder head cover. Refer to 11 12 005 REMOVING AND INSTALLING/SEALING LEFT CYLINDER HEAD COVER (N62/N62TU) .

Install ignition coils on cylinder bank 5 to 8.

Assemble engine.