A modular cylinder head is configured for use with combustion engine block configurations each having different valvetrain oiling pathways. Thus, when used with “LA-style” engine blocks, oil receiving/delivery ports provided by the cylinder head are compatibly interfaced with an oil outlet port provided by the engine block, thus allowing oil to pass from the engine block into the head for delivery to a valvetrain carried thereby. Alternatively, when the head is used with “Magnum-style” engine blocks, the oil receiving/delivery ports of the head are not used. Rather, a pushrod and lifter having internal ports are used by the cylinder head to allow oil to pass from the engine block, through the internal ports of the lifter and pushrod, and into the valvetrain.

A modular cylinder head is configured for use with combustion engine block configurations each having different valvetrain oiling pathways. Thus, when used with LA-style engine blocks, oil receiving/delivery ports provided by the cylinder head are compatibly interfaced with an oil outlet port provided by the engine block, thus allowing oil to pass from the engine block into the head for delivery to a valvetrain carried thereby. Alternatively, when the head is used with Magnum-style engine blocks, the oil receiving/delivery ports of the head are not used. Rather, a pushrod and lifter having internal ports are used by the cylinder head to allow oil to pass from the engine block, through the internal ports of the lifter and pushrod, and into the valvetrain.

A screw connection system connecting a plastic component with a metal component has a bushing and a screw with a screw shank and an external thread arranged on the screw shank. The screw is captively guided in the bushing. The bushing, in a screw-connected state of the screw connection system, extends with a first section in a bore of the plastic component and with a second section in an aligned bore of the metal component aligned with the bore of the plastic component. The bore of the plastic component and the aligned bore of the metal component are positioned at an angle relative to a vertical line on joining surfaces of the plastic component and of the metal component adjoining each other in the screw-connected state. The bushing is movable out of the plastic component when screwing the screw into the metal component.

An engine includes an output shaft, a cylinder block, a cylinder head, a cap portion, and head bolts. The cylinder block, the cylinder head, and the cap portion are fastened together with the head bolts. The cylinder block includes a cylinder portion and a plurality of output shaft supporting portions. When an outer wall face of at least one of the plurality of output shaft supporting portions is viewed along an output shaft axial direction, the outer wall face includes a first rib diagonally extending from a supporting portion of the output shaft toward one of two head bolt holes.

A bracket includes a bracket body, a threaded insert, and a fastener. The bracket body defines a first opening positioned to align with a second opening in a cylinder head. The threaded insert is positioned in the first opening. The threaded insert includes an exterior surface threadably engaged with the first opening, an inner surface defining an aperture, and an end face. Rotation of the threaded insert in the first opening facilitates selective repositioning of the threaded insert in the first opening. The fastener is configured to be received in the aperture of the threaded insert. The aperture is configured to receive a tool for selective rotation of the threaded insert.

A cover member includes a body member made of a composite material and including a mounting flange. A plurality of compression limiters are disposed in the mounting flange, the compression limiters have a predetermined thickness and an internally threaded aperture therein. The dual function compression limiters eliminate the need for separate threaded inserts. With the dual function compression limiter, every bolt location provides a potential location for a jack screw.

An engine and a method of forming an engine are provided. The engine has a block that defines a cooling jacket extending continuously about an outer perimeter of first and second siamesed cylinders. The block defines a series of head bolt bores intersecting a deck face such that each cylinder is surrounded by four bores. The jacket has a first floor and a second floor. The second floor is offset above the first floor and extends along an intake side of the block between midpoints of the first and second cylinders, respectively. The second floor is configured to decouple a relationship between the cooling jacket and the series of bores for each cylinder and reduce fourth order bore distortion for each cylinder.

An engine variable valve operating apparatus includes a cam switching mechanism having a switching drive shaft. When the switching drive shaft is longitudinally moved, a cam mechanism advances and retracts a switching pin. When the switching pin is advanced to engage in a lead groove formed around a cam carrier and the cam carrier is axially moved while rotating, cam lobes around the cam carrier are switched to act on an engine valve. An actuator for the switching drive shaft includes an actuator drive body which is linearly reciprocally movable and is coupled to a longitudinal end of the switching drive shaft to axially move the same. The above arrangement enables the cam switching mechanism and the actuator mechanism to be simple and compact in structure for preventing the engine from becoming large in size.

A screw connection system connecting a plastic component with a metal component has a bushing and a screw with a screw shank and an external thread arranged on the screw shank. The screw is captively guided in the bushing. The bushing, in a screw-connected state of the screw connection system, extends with a first section in a bore of the plastic component and with a second section in an aligned bore of the metal component aligned with the bore of the plastic component. The bore of the plastic component and the aligned bore of the metal component are positioned at an angle relative to a vertical line on joining surfaces of the plastic component and of the metal component adjoining each other in the screw-connected state. The bushing is movable out of the plastic component when screwing the screw into the metal component.

A bracket includes a bracket body, a threaded insert, and a fastener. The bracket body defines a first opening positioned to align with a second opening in a cylinder head. The threaded insert is positioned in the first opening. The threaded insert includes an exterior surface threadably engaged with the first opening, an inner surface defining an aperture, and an end face. Rotation of the threaded insert in the first opening facilitates selective repositioning of the threaded insert in the first opening. The fastener is configured to be received in the aperture of the threaded insert. The aperture is configured to receive a tool for selective rotation of the threaded insert.