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11 31 573 Adjusting camshaft timing on left 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 5 to 8) 

Necessary preliminary work: 

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

NOTE: 1.  Special tool 11 9 891 Knurled screw.
2.  Special tool 11 9 892 Press-down bar.
3.  Special tool 11 9 893 Gap gauge for intake and exhaust camshafts.
4.  Special tool 11 9 894 spacer.
5.  Special tool 11 9 895 Adapter
Fig 1: Identifying Special Tools For Securing Camshafts
G09920827Courtesy of BMW OF NORTH AMERICA, INC.
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 Central Bolts Of Intake/Exhaust Camshaft Adjusters
G09920828Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Check whether head of central bolt (1) is greased (see arrow).
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: Identifying Central Bolt
G09923021Courtesy of BMW OF NORTH AMERICA, INC.

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

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.

Fig 4: Installing Special Tools (11 9 893 and 11 9 894) And Cylinder Head
G09923022Courtesy of BMW OF NORTH AMERICA, INC.

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) On (11 9 893) And Securing Both Special Tools (11 9 891) With (11 9 893)
G09923023Courtesy of BMW OF NORTH AMERICA, INC.

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 Central Bolts Of Intake/Exhaust Camshaft Adjusters
G09923024Courtesy of BMW OF NORTH AMERICA, INC.

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 Using Special Tool (11 9 190)
G09923025Courtesy of BMW OF NORTH AMERICA, INC.

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) On Exhaust Camshaft
G09923026Courtesy of BMW OF NORTH AMERICA, INC.

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: Identifying Special Tool (11 9 893)
G09923027Courtesy of BMW OF NORTH AMERICA, INC.

Remove all special tools.

Assemble engine.