Necessary preliminary tasks

Remove LEFT TIMING CASE COVER .
CHECK CAMSHAFT TIMING ON LEFT SIDE .

Get special tool 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 inlet and exhaust camshafts.
Special tool 11 9 894 spacer.

Fig 1: Identifying Special Tools

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 inlet and exhaust adjustment units.

Installation:

Replace central bolts after releasing.

Fig 2: Identifying Intake And Exhaust Camshaft Adjusters Central Bolts

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 ADJUSTMENT UNIT must be replaced for safety reasons.

Installation:

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

Fig 3: Locating Contact Surface Of Central Bolt

Position special tool 11 9 893 on inlet and exhaust camshafts.

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: Attaching 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: Pressing Special Tool (11 9 892) Down Using Special Tool (11 9 891)

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

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

Tightening torque: 11 36 1AZ.

Fig 6: Identifying Adjustment Units Central Screw

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 Tools

Fit special tool 11 9 893 on 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: Fitting Special Tool (11 9 893) On Exhaust Camshaft

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) On Intake Camshaft

Remove all special tools.

Assemble engine.