11 31 573 Adjusting Camshaft Timing on Left Side

11 31 573 Adjusting camshaft timing on left side (N63)

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:





^ Remove left gear case cover
^ Check camshaft timing on left 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.





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.

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.





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.





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

Both special tools11 9 891 are secured with special tool 11 9 893.

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

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





Secure central bolt (2) of exhaust camshaft adjuster with special tool00 9 120.

Tightening torque: 11 36 1AZ.





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.





Place special tool11 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.

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.





Remove all special tools.

Assemble engine.