Cylinder Head Installed

(intake or exhaust side as applicable)
Removing spark plugs, refer to Powertrain Management.
Remove all fingers, refer to Cylinder Head Assembly.
Remove the gear-case cover, top, refer to Timing Components.
Remove the hydraulic chain tensioner, refer to Timing Components.

Removal
Removal of the camshaft is described separately from installation.
Assembly sequence differs between removal and installation.





Turn central screw to rotate crankshaft in normal direction of rotation until piston of first cylinder is at firing TDC.





Note: At firing TDC, alignment bores are pointing upwards.





Remove dust cover from locating bore.





Secure crankshaft in TDC position with Special Tool 11 2300.

Caution: Removing Special Tool prior to operating engine.





Remove the chain wheels.





Release the chain guide.





Release the bearing cover and lay aside in correct order.
Lift out camshaft.

Installation
Installation of the camshaft is described separately from removal.
Assembly sequence differs between removal and installation.





Install camshaft.

Note: The camshafts are designated each with a cast letter.
(A) for exhaust camshaft.
(E) for intake camshaft.





The designations of the bearing covers can be read on the intake side.
E1 through E5 for the intake side.
A1 through A5 for the exhaust side.
Fit the bearing cover and tighten down.
Tightening torque, refer to Engine, Specifications.





Install chain guide.





Position the camshafts using Special Tool 11 3 240 in firing TDC position of first cylinder.





Note: At firing TDC, alignment bores are pointing upwards.





Place the chain with the chain wheels.

Note: Arrow on chain wheel in cylinder axis points up. Align long bores centrally.





Place the sensor gear onto the inlet chain wheel.

Note: Arrow on sensor gear in cylinder axis points up.





Insert all chain wheel screws and tighten so that they are free of play; the chain wheels remain loose.

Install hydraulic chain tensioner.

Caution: Note installation instructions, refer to Timing Components.





Tighten down the chain wheels.
Tightening torque, refer to Engine, Specifications.
Remove Special Tools 11 2 300 and 11 3 240.
Install all fingers, refer to Cylinder Head Assembly.
Assemble engine.