11 31 038 Removing and installing/replacing right exhaust camshaft (N62/N62TU)

(cylinder bank 1 to 4)

Necessary Preliminary Tasks:

Remove servomotor for right eccentric shaft. Refer to 11 37 024 REMOVING AND INSTALLING/REPLACING SERVOMOTOR FOR RIGHT ECCENTRIC SHAFT (N62/N62TU) .

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/N62TU) .

Remove slide rail (1).

Fig 1: Identifying Slide Rail

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Rotate exhaust camshaft at hexagon head against direction of rotation until exhaust cam on cylinder (2) faces 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 1 to 4 with L A1 to L A5 from inlet side.

Release nuts and remove bearing cap L A1.

Fig 3: Locating Bearing Cap L 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 L A2 to L A5.

Fig 4: View Of Retaining Clips For Bearing Caps 3 And 5

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Remove bearing caps L A2 to L A5.

Fig 5: Identifying Bearing Caps L A2 To L A5

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Remove exhaust camshaft (1).

Fig 6: Locating 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: Identifying Plain Compression Rings

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If necessary, replace sensor gear (1).

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

Fig 8: View Of Sensor Gear

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IMPORTANT: 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: 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 11: Locating Compression Rings

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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 Of Exhaust Camshaft

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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: Aligning 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 2 is facing upwards.

Fig 14: View Of 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: Identifying Ends Of Compression Rings

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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 1 to 4 with L A1 to L A5 from inlet side.

Fit bearing caps L A2 to L A5.

Fig 16: Locating Bearing Caps L A2 To L 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 L A2 to L 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 On Bearing Caps

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.

Fit bearing cap L 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: Locating Bearing Cap L 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: Identifying Slide Rail 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 1st cylinder points upwards at an angle as shown in illustration.

Fig 21: Aligning Cam On 1st Cylinder

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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/N62TU) .

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.

Assemble engine.