11 31 028 Removing and installing/replacing exhaust camshaft (N14)

WARNING: This page is about a different variant/trim than selected.

IMPORTANT: It is absolutely essential to follow an exact procedure for removing and installing the exhaust camshaft.

Necessary preliminary tasks:

Remove CYLINDER HEAD COVER .
Check TIMING .
Remove CHAIN TENSIONER .

To release central bolts, always use special tool 11 9 551 of exhaust camshaft.

Position special tool 11 9 551 on mounting flats of exhaust camshaft.

Secure special tool 11 9 551 with a screw (1).

Fig 1: Securing Special Tool (11 9 551) With Screw

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IMPORTANT: Check function of camshaft adjuster locking by rotating camshaft.

Position special tool 11 9 551 on intake and exhaust camshafts.

Screw in 11 9 552 special tool on cylinder head with a screw.

To release central bolts, always use special tool 11 9 551.

Fig 2: Positioning Special Tool (11 9 551) On Intake And Exhaust Camshafts

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Unfasten screws (2).

Remove tensioning rail (1).

Fig 3: Identifying Tensioning Rail With Screws

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Release screw (1).

Tightening torque: 11 11 3AZ.

Fig 4: Identifying Screw

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Release central bolt (3).

Tightening torque: 11 36 2AZ.

Feed out sprocket (2) from timing chain (1) towards front.

Fig 5: Identifying Sprocket Of Timing Chain And Central Bolt

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NOTE: Do not remove VANOS adjuster.

Release central bolt (3).

Tightening torque: 11 36 1AZ.

Fig 6: Identifying Central Bolt

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IMPORTANT: Removed cylinder head:

When using special tool 11 9 000 , it will be necessary to remove the aluminum strip.

Screw special tool 11 9 661 with special tools 11 9 662 into spark plug holes.

Fig 7: Positioning Special Tools (11 9 662) Into Spark Plug Holes

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Release all screws on bearing caps (1 and 2).

Tightening torque: 11 12 7AZ.

Bearing cap (1) is a thrust bearing and has the number (0).

All bearing caps (2) are identified with numbers from (1 to 4).

Fig 8: Identifying Bearing Caps

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Exhaust camshaft is identified with designation (EX).

Insert exhaust camshaft so that designation (EX) can be read from above.

Fig 9: Identifying Designations For Inlet Camshaft (IN) And Exhaust Camshaft (EX)

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Position exhaust camshaft (1) so that cam of exhaust camshaft (1) points inward at an angle.

Installation:

Lubricate all bearing points with engine oil.

Fig 10: Identifying Exhaust Camshaft

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Assemble engine.

Installation:

Adjust VALVE TIMING .