11 31 028 Replacing exhaust camshaft (N57 Diesel)

Special tools required:

Necessary preliminary tasks:

Crank engine with special tool 11 6 480 to firing TDC position of cylinder no. 1.

IMPORTANT: Do not turn the engine back.

Fig 1: Identifying Special Tool (11 6 480)

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Check position of exhaust and intake camshafts (see Fig 2).

Fig 2: Identifying Camshaft Sprockets

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Remove exhaust camshaft .

NOTE: It is not necessary to adjust the engine timing in order to remove the exhaust camshaft.

Release bearing caps A1 to A7 by 1/2 a turn at a time, working from the outside inwards.

Feed exhaust camshaft upwards to remove.

Fig 3: Exhaust Camshaft Bearing Caps Bolts Tightening/Loosening Sequence (N57)

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Preparation for installation:

Oil all bearing positions (1).

Fig 4: Identifying Bearing Positions

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Check installation position of the roller cam followers (risk of damage.) .

Fig 5: Identifying Roller Cam Follower

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Install exhaust camshaft:

Insert exhaust camshaft (1) marked with (A).

Fig 6: Inserting Exhaust Camshaft

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The marks on both camshafts (A and E) must agree when installing exhaust camshaft (A) (see Fig 7).

Fig 7: Identifying Camshaft Sprockets

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Fit all bearing caps A1 to A7.

The bearing caps can be read from the intake side.

Fig 8: Identifying Bearing Cap Identification Mark

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Tighten bearing caps A1 to A7 by 1/2 a turn at a time on the camshaft carrier, working from the inside outwards.

Tightening torque: 11 31 2AZ .

Fig 9: Exhaust Camshaft Bearing Caps Bolts Tightening/Loosening Sequence (N57)

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Using special tool 11 6 480 , crank engine twice in direction of rotation until cylinder no. 1 is back in TDC firing position.

IMPORTANT: Do not turn the engine back.

Fig 10: Identifying Special Tool (11 6 480)

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Assemble engine.