11 33 516 Removing and installing/replacing rocker arms on left inlet side (N62 from 9/03): Installation

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Installation of rocker arms is described separately from removal.

Clean all bearings and cams of inlet camshaft and lubricate with engine oil.

Ends of compression rings (1) point upwards.

Fig 1: Identifying Compression Rings

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

Install rocker arms (1) on inlet side.

Fig 2: Securing Rocker Arms

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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 rocker arms (1) straight.

Remove special tool 11 9 473.

Fig 3: Removing Bearing Bracket From Special Tool

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Remove bearing bracket (1) from special tool 11 9 470.

IMPORTANT: Do not tilt bearing bracket (1).

Lower bearing bracket (1) from above and carefully bring into contact with cylinder head.

Fig 4: Lowering Bearing Bracket

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Insert nuts and tighten by hand without play.

IMPORTANT: Make sure none of the intermediate levers or rocker arms have slipped out.

Tighten down nuts from inside to outside.

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

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

Fit bearing cap R E1 in such a way that marking is legible from inlet side.

Fig 5: Identifying Bearing Cap Marking

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Install nuts and tighten down.

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

Rotate eccentric shaft at dihedral head as illustrated in order to reduce tension on torsion spring (1).

Fig 6: Rotating Eccentric Shaft At Dihedral Head

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Pretension torsion spring (1) with a cable strap (2), feed out from roller (3) and carefully relieve tension.

Rotate eccentric shaft at dihedral head as shown in illustration back to minimum stroke position.

Fig 7: Rotating Eccentric Shaft Back To Minimum Position

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

Fig 8: Rotating Inlet Camshaft

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NOTE: The marking (1) on the hexagon drive of the inlet camshaft faces upwards.

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.

Install servomotor for left eccentric shaft. Refer to 11 37 022 Removing and installing/replacing servomotor for left eccentric shaft (N62) .

Assemble engine.