11 31 036 Removing and installing/replacing left exhaust camshaft (N62): 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 1: Identifying Camshaft Groove

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

Fig 2: Installing Sensor Gear

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Insert screw (2) and tighten down.

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

Installing compression rings (1):

Fig 3: Installing Compression Rings

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CAUTION: 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.

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 4: Identifying Rocker Arms Of Exhaust Camshaft

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CAUTION: 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.

Fig 5: Securing Rocker Arms

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

Lubricate exhaust camshaft and bearing caps with engine oil. Install exhaust camshaft (1).

Fig 6: Installing Exhaust Camshaft

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

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

Fig 7: Identifying Adapter Sleeves And Ends Of Compression Rings

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Ends of compression rings (1) point upwards.

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

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

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 8: Identifying Bearing Caps Of Exhaust Camshaft

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

Fig 9: Identifying Retaining Clips For Oil Line

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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, 11 31 1AZ. Refer to ENGINE - TIGHTENING TORQUES .

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

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

Fig 10: Installing Bearing Cap R A1

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Install nuts and tighten down.

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

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

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

Fig 11: Identifying Gasket

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

Fig 12: Installing Slide Rail

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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 13: Rotating Exhaust Camshaft

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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) .

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.