Abstract: Hinge pins for use in a method of accessing a crankshaft within an internal combustion engine that includes: A) inserting a first hinge pivot of a first hinge pin into a first bore on a front side of the internal combustion engine and locking in place; B) inserting a second hinge pivot of a second hinge pin into a second bore on a rear side opposite from the front side of the internal combustion engine and locking in place; and C) rotating the upper block upward around an axis of rotation running through the first bore and the second bore to expose a cavity between the upper block and the lower block to allow access to the crankshaft.

Abstract: This is a modular internal combustion engine with an upper and lower block construction comprising a lower block with multiple angles mating with the upper block and having an upper block construction that allows the upper block to tilt over for easy access to the crankshaft and other lower end components. An upper and lower block that can be die cast without cores.