11 31 028 Removing and installing/replacing exhaust camshaft (N20/N26)

Special tools required :

11 9 000
83 30 0494 362

Necessary preliminary tasks :

Release screws (1).

Tightening torque: 11 31 4AZ .

Fig 1: Identifying Timing Chain Module Bolts

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Release banjo bolt (1).

Tightening torque. 11 31 9AZ .

Installation note :

Replace sealing rings.

Unclip engine oil pipe (2) from the brackets (see arrows).

Fig 2: Identifying Banjo Bolt And Engine Oil Pipe

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Release screws (1).

Tightening torque: 11 31 1AZ .

Remove bearing cap (2).

Fig 3: Identifying Bearing Cap Screws

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Remove roller tappet (1).

Unfasten screws (2).

Tightening torque: 11 31 1AZ .

Remove high-pressure pump bracket (3).

Fig 4: Identifying High-Pressure Pump Bracket, Roller Tappet And Screws

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Release screws (1 and 2) by half a rotation.

Tightening torque: 11 31 1AZ .

Fig 5: Identifying Screws

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IMPORTANT: Marks of intake and exhaust camshafts are different.
Mixing up the intake and exhaust camshaft will result in engine damage .
A = Exhaust camshaft.
E = Intake camshaft

Fig 6: Identifying Intake And Exhaust Camshafts Marks

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IMPORTANT: Removal on engine:
Set engine to ignition TDC at cylinder No. 1.
Removed cylinder head:
When using special tool 11 9 000 , it will be necessary to remove the aluminium strip.
Order number: 83 30 0494 362

Installation note :

Prior to installation of exhaust camshaft, ensure proper installation position of rocker arm (1).

Fig 7: Identifying Rocker Arm

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Insert exhaust camshaft so that the data code (1) on the mounting flats faces up.

NOTE: Graphic of intake camshaft N43

Fig 8: Identifying Intake And Exhaust Camshaft Designation

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The cam (1) at cylinder 4 points downward at an angle.

Fig 9: Identifying Position Of Cam At Cylinder 4

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Assemble engine.