Removing and Installing/Replacing Exhaust Camshaft

11 31 028 Removing and installing/replacing exhaust camshaft (N14)

Special tools required:





Important!
It is absolutely essential to follow an exact procedure for removing and installing the exhaust camshaft.





Necessary preliminary tasks:
^ Remove cylinder head cover.
^ Check timing.
^ Remove chain tensioner.





To release central bolts, always use special tool 11 9 551 of exhaust camshaft.

Position special tool 11 9 551 on mounting flats of exhaust camshaft.

Secure special tool 11 9 551 with a screw (1).





Important!
Check function of camshaft adjuster locking by rotating camshaft.

Position special tool 11 9 551 on intake and exhaust camshafts.

Screw in 11 9 552 special tool on cylinder head with a screw.

To release central bolts, always use special tool 11 9 551.





Unfasten screws (2).

Remove tensioning rail (1).





Release screw (1).

Tightening torque: 11 11 3AZ.





Release central bolt (3).

Tightening torque: 11 36 2AZ.

Feed out sprocket (2) from timing chain (1) towards front.





Note:
Do not remove VANOS adjuster.
Release central bolt (3).

Tightening torque: 11 36 1AZ.





Important!
Removed cylinder head:
When using special tool 11 9 000, it will be necessary to remove the aluminium strip.





Screw special tool 11 9 661 with special tools 11 9 662 into spark plug holes.





Release all screws on bearing caps (1 and 2).

Tightening torque: 11 12 7AZ.

Bearing cap (1) is a thrust bearing and has the number (0).

All bearing caps (2) are identified with numbers from (1 to 4).





Exhaust camshaft is identified with designation (EX).

Insert exhaust camshaft so that designation (EX) can be read from above.





Position exhaust camshaft (1) so that cam of exhaust camshaft (1) points inward at an angle.

Installation:
Lubricate all bearing points with engine oil.





Assemble engine.

Installation:

Adjust valve timing.