Loosen the valve and injector adjusting screw lock nuts on each rocker lever.

Turn the adjusting screws counterclockwise until the rocker levers are loose.

CAUTION  Do not attempt to remove or install the rocker lever shaft assemblies without resetting the lash.

Remove the rocker lever assemblies. Refer to Procedure 003-009 in Section 3.

NOTE: To prevent increased wear, mark each rocker lever housing as it is removed so it can be installed back in its original location.

Remove the crossheads. Make sure to mark them appropriately so they can be installed in the same location and orientation during the installation procedure.

NOTE: Excessive crosshead wear can result if the crossheads are not installed in their original locations. The larger hole on the underside of the crosshead must be oriented toward the exhaust side of the engine.

Disconnect the injector solenoid leads from the pass through connector in the rocker lever housing.

Remove the injector hold down clamp capscrew.

Remove the injector hold down clamp.

Remove the water manifold tube clamps. Use jumper tube removal tool, Part Number 3823819, to push or pry the adjacent water tubes into the rocker lever housing cavity.

For example, the tube between housing Number 1 and Number 2 must be pushed into housing Number 2. The tube between housing Number 2 and Number 3 must be pushed into housing Number 3.

Disconnect the wiring harness.

Remove the coolant thermostat housing from the front rocker lever housing. Refer to Procedure 008-014 in Section 8.

Remove the rocker lever housing mounting capscrews.

NOTE: To prevent increased wear, mark each rocker lever housing as it is removed so it can be installed back in its original location.

Remove the rocker lever housings and the gaskets.

NOTE: On CELECT™ engines while handling the rocker lever housings, protect the wiring harness pass through connectors. Do not subject the pass through connectors to impact forces and do not rest the housing on the face with the pass through connectors.