11 31 574 Adjusting camshaft timing on right side (N63)

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Special tools required:

IMPORTANT: Release central bolts on adjuster only with special tool 11 9 890 .
Risk of damage to timing drive.
If special tool 11 9 890 can not be fitted, it is necessary when releasing the central bolt to grip the hexagon head of the respective camshaft.

(cylinder bank 1 to 4)

Necessary preliminary work:

Remove RIGHT-HAND GEAR CASE COVER
CHECK CAMSHAFT TIMING ON RIGHT SIDE .

Get set of special tools 11 9 890 ready for securing camshafts.

NOTE: Special tool 11 9 891 Knurled screw.
Special tool 11 9 892 Press-down bar.
Special tool 11 9 893 Gap gauge for intake and exhaust camshafts.
Special tool 11 9 894 spacer.

Fig 1: Identifying Camshaft Special Tools

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IMPORTANT: If special tool 11 9 890 can not be fitted, it is necessary when releasing the central bolt to grip the hexagon head of the respective camshaft.

Release central bolts (1 and 2) of intake and exhaust camshaft adjusters.

Installation note:

Replace central bolts after releasing.

Fig 2: Identifying Intake And Exhaust Camshaft Adjusters Central Bolts

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IMPORTANT: Check whether head of central bolt (1) is greased (see arrow in illustration).
If no grease can be seen on the bolt head of central bolt (1), the ADJUSTER must be replaced for safety reasons.

Installation note:

Coat contact surface of new central bolt (1) with copper paste.

Fig 3: Coating Contact Face Of New Central Bolt With Copper Paste

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Position special tool 11 9 893 on intake camshaft and exhaust camshaft.

Fig 4: Positioning Special Tool (11 9 893) On Intake And Exhaust Camshafts

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The special tool 11 9 893 must rest without a gap on cylinder head; if necessary, adjust camshaft at hexagon heads.

Screw special tool 11 9 894 into cylinder head.

Position special tool 11 9 892 on special tool 11 9 893 .

Both special tools 11 9 891 are secured with special tool 11 9 893 .

NOTE: Tighten down special tool 11 9 891 by hand.

Fig 5: Positioning Special Tool (11 9 892)

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Secure central bolt (1) of intake camshaft adjuster with special tool 00 9 120 .

Secure central bolt (2) of exhaust camshaft adjuster with special tool 00 9 120 .

Tightening torque: 11 36 1AZ .

Fig 6: Identifying Intake And Exhaust Camshaft Adjusters Central Bolts

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Remove special tools 11 9 190 and 11 8 570 .

Crank engine at central bolt twice in direction of engine rotation until engine returns to 150° before cylinder no. 1 firing TDC position.

Secure vibration damper with special tool 11 9 190 at 150° before cylinder no. 1 firing TDC position 1.

Fig 7: Securing Vibration Damper At 150° Before Cylinder No. 1 Firing TDC Position 1

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Place special tool 11 9 893 on the exhaust camshaft and check timing adjustment.

NOTE: Timing is correctly adjusted when special tool 11 9 893 rests without a gap on cylinder head.

Fig 8: Placing Special Tool (11 9 893) Onto Exhaust Camshaft

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Fit special tool 11 9 893 on intake camshaft and check timing adjustment.

NOTE: Timing is correctly adjusted when special tool 11 9 893 rests without a gap on cylinder head.

Fig 9: Fitting Special Tool (11 9 893) Onto Intake Camshaft

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Remove all special tools.

Assemble engine.