Engine with cooling system

A method of distributing coolant in an engine assembly, the method comprising:

• causing coolant to flow from a coolant manifold to a cylinder block coupled to the coolant manifold, the cylinder block including one or more cylinder block inlets, one or more sets of cylinder block passages, and one or more pairs of cylinder block openings disposed therein, each cylinder block opening configured to house a piston, the coolant manifold including a plurality of coolant flow passages, each coolant flow passage in fluid communication with a respective cylinder block inlet, each cylinder block inlet disposed in the cylinder block between a respective pair of cylinder block openings and connected to a respective set of cylinder block passages, the respective set of cylinder block passages comprising four passages configured to direct coolant around the pair of cylinder block openings by:
• providing a first passage connected between the cylinder block inlet and a first cylinder block outlet for a first cylinder block opening of the pair of cylinder block openings, and causing coolant flowing around a first side of the first cylinder block opening through the first passage;
• providing a second passage connected between the cylinder block inlet and a second cylinder block outlet for the first cylinder block opening, and causing coolant flowing around a second side of the first cylinder block opening through the second passage, wherein the first side of the first cylinder block opening opposite the second side of the first cylinder block opening;
• providing a third passage connected between the cylinder block inlet and a third cylinder block outlet for a second cylinder block opening of the pair of cylinder block openings, and causing coolant flowing around a first side of the second cylinder block opening through the third passage;
• and
• providing a fourth passage connected between the cylinder block inlet and a fourth cylinder block outlet for the second cylinder block opening, and causing coolant flowing around a second side of the second cylinder block opening through the fourth passage, wherein the first side of the second cylinder block opening opposite the second side of the second cylinder block opening;
• causing coolant to flow from the cylinder block to a cylinder head coupled to the cylinder block,
• wherein causing the coolant to flow to the cylinder block includes causing the coolant from each cylinder block inlet to diverge into a respective set of cylinder block passages, each cylinder block passage extending about a peripheral portion of a respective cylinder block opening in the respective pair of cylinder block openings, and wherein each cylinder block passage extends from the peripheral portion of the respective cylinder block opening into the cylinder head through one or more cylinder block outlets;
• and
• causing coolant to flow into a cylinder head coolant manifold of the cylinder head from the one or more cylinder block outlets from the engine block, the cylinder head coolant manifold including a water jacket adjacent to a valve seat of an air intake port, the water jacket in fluid communication with an area adjacent to a valve seat of a combustion gas exhaust port.

A cooling system for an engine, comprises:

• a cylinder block jacket coupled to a cylinder block, wherein the cylinder block comprising one or more pairs of cylinder block openings, the cylinder block jacket comprising:
• one or more cylinder block inlets receiving coolant from a coolant manifold, the one or more cylinder block inlets located at a first side of the cylinder block, each cylinder block inlet located between a pair of cylinder block openings;
• one or more sets of cylinder block outlets located at a second side of the cylinder block, the second side of the cylinder block opposite the first side of the cylinder block;
• and
• one or more sets of cylinder block passages, each set of cylinder block passages connected between a respective cylinder block inlet located between a pair of cylinder block openings and a respective sets of cylinder block outlets, each set of cylinder block passages comprising four passages including:
• a first passage connected between the cylinder block inlet and a first cylinder block outlet of the sets of cylinder block outlets, the first passage configured to direct coolant flow around a first cylinder block opening of the pair of cylinder block openings;
• a second passage connected between the cylinder block inlet and a second cylinder block outlet of the set of cylinder block outlets, the second passage configured to direct coolant flow around the first cylinder block opening;
• a third passage connected between the cylinder block inlet and a third cylinder block outlet of the set of cylinder block outlets, the third passage configured to direct coolant flow around a second cylinder block opening of the pair of cylinder block openings;
• and
• a fourth passage connected between the cylinder block inlet and a fourth cylinder block outlet of the set of cylinder block outlets, the fourth passage configured to direct coolant flow around the second cylinder block opening.