Removal

Removing timing chain (M62 up to 9/98)

Removal

Removal of timing chain is described separately from installation. Assembly sequence for removal and installation is different.

Remove spark plugs. Service and Repair
Remove both cylinder head covers. Service and Repair





Remove oil lines on left and right of cylinder head.

Remove vibration damper. Service and Repair
Release central bolt of hub for vibration damper.





Rotate engine at slackened central bolt in direction of rotation until the first cylinder is in TDC firing position.





Note: In TDC position of first cylinder, marker bores of camshafts point upwards.





Secure crankshaft in TDC position with special tool 11 2 300.

Remove piston for chain tensioner. Service and Repair
Remove timing case cover, top left. Service and Repair
Remove timing case cover, top right. Service and Repair





Note: When unfastening screw connection on camshaft, brace camshaft on hex head.

Caution: Do not damage the cylinder head.

If necessary, machine open-end wrench accordingly.





Release sprocket on right inlet camshaft (cylinder bank 1 to 4).





Fit special tool 11 2 445 / 441 to camshafts on cylinder bank 1 to 4.





Align camshaft with open-end wrench in such a way that special tool 11 2 441 / 445 locates flush against the cylinder head.

Caution: Do not damage the cylinder head.





Fit special tool 11 2 443 to special tool 11 2 445 / 441 and secure with special tool 11 2 444 using the spark plug thread.





Release sprocket on left inlet camshaft (cylinder bank 5 to 8).





Fit special tool 11 2 446 / 442 to camshafts on cylinder bank 5 to 8.





Align camshaft with open-end wrench in such a way that special tool 11 2 442 / 446 locates flush against the cylinder head.

Caution: Do not damage the cylinder head.





Fit special tool 11 2 443 to special tool 11 2 446 / 442 and secure with special tool 11 2 444 using the spark plug thread.

Remove loosened central screw and lift out hub for vibration damper





Caution: Do not turn engine any more.

Remove special tool 11 2 300.

Remove upper oil sump section. Service and Repair
Remove water pump with thermostat housing. Service and Repair
Remove timing case cover, bottom. Service and Repair





Remove sprockets from intake camshaft.
Remove timing chain.





If necessary, remove tensioning rail.
Release securing screw on tensioning rail, remove tensioning rail with oil guide.





If necessary, remove reversing rail.
Unfasten grub screw (1).
Release securing screw on reversing rail and remove reversing rail.





If necessary, remove guide rail.
First loosen screw (2) for oil separator.
Release screws (1 and 3), remove guide rail.