Method of and conversion kit for converting an engine to hydraulically-actuated fuel injection system

A fuel injection system for an internal combustion engine, the engine having a cylinder block and a cylinder head defining a plurality of injector bores and being conventionally mounted to the cylinder block, comprising:

• an adapter assembly releasably connected to the cylinder head and defining an actuating fluid manifold, a fuel manifold, and a plurality of injector bores in substantial axial alignment with the plurality of injector bores in the cylinder head;
• a plurality of fuel injector sleeves, one positioned in each of the plurality of injector bores in the cylinder head and the adapter assembly;
• a plurality of hydraulically-actuated fuel injectors, one positioned in each of the plurality of injector sleeves with the injectors each having an actuating fluid inlet passage and a fuel inlet passage;
• the adapter assembly including actuating fluid passage means for communicating between the actuating fluid manifold and the actuating fluid inlet passage of each of the injectors;
• and
• the adapter assembly including fuel passage means for communicating between the fuel manifold and the fuel inlet passage of each of the injectors.

A method of converting an internal combustion engine to a hydraulically actuated fuel injection system, the engine having a cylinder block and a cylinder head defining a plurality of injector bores and being conventionally mounted to the cylinder block, comprising the steps of:

• connecting an adapter assembly releasably to the cylinder head, the adapter assembly defining an actuating fluid manifold, a fuel manifold, and a plurality of injector bores in substantial axial alignment with the plurality of injector bores in the cylinder head;
• positioning a fuel injector sleeve in each of the plurality of injector bores in the cylinder head and the adapter assembly;
• positioning a hydraulically-actuated fuel injector in each of the plurality of injector sleeves, the injectors each having an actuating fluid inlet passage and a fuel inlet passage;
• providing communication between the actuating fluid manifold and the actuating fluid inlet passage of each of the injectors;
• and
• providing communication between the fuel manifold and the fuel inlet passage of each of the injectors.