11 33 062 Removing and installing/replacing all rocker arms (N47 D20 O1)

Special tools required: 

• 11 4 480
• 11 5 320
• 11 6 480

Necessary preliminary work: 

• Remove CYLINDER HEAD COVER .

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

Fig 1: Identifying Special Tool (11 6 480)

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Remove protective cap of gear case cover.

Block crankshaft with cylinder no. 1 in TDC firing position with special tool 11 5 320 .

Fig 2: Identifying Special Tool (11 5 320)

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Release CHAIN TENSIONER (1) .

Fig 3: Identifying Chain Tensioner Bolts

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Release screws (1).

Remove camshaft sprocket from the intake camshaft and feed out of timing chain.

Place timing chain at the cylinder head.

Fig 4: Identifying Screws On Camshaft Sprocket

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Release all bolts (1) from outside inwards.

Fig 5: Identifying Camshaft Carrier Bolts

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Set down all rocker arms (1) on special tool 11 4 480 in neat order.

Installation note: 

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

Fig 6: Locating Rocker Arms

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Installation note: 

Make sure roller cam followers are in correct installation positions.

Place camshaft carrier on cylinder head.

Tighten bolts in sequence (1 to 14).

Tightening torque: 11 31 3AZ .

Fig 7: Camshaft Carrier Bolts Tightening/Loosening Sequence (N47 D20 O1)

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Adjust VALVE TIMING .

Assemble engine.