Belt cover structure for internal combustion engine

A belt cover structure for an internal combustion engine that is disposed on one side surface of an internal combustion engine body and houses at least a part of a timing belt that transmits power between a crankshaft and a camshaft, the belt cover structure comprising:

• an inner cover member that covers the timing belt on a side closer to the internal combustion engine than the timing belt;
• and
• an outer cover member that covers the timing belt on a side farther from the internal combustion engine than the timing belt,
• the outer cover member including at least a lower outer cover member that covers a periphery of the crankshaft, wherein
• the internal combustion engine body holds a side mount bracket that is disposed adjacent to an upper side of the lower outer cover member,
• mating surfaces that are aligned with each other are respectively formed on the lower outer cover member and the side mount bracket,
• a lower seal member that seals the lower outer cover member and the side mount bracket is disposed on the mating surface of the lower outer cover member,
• the mating surface of the side mount bracket is configured to cover the mating surface of the lower outer cover member from an outside, and
• the lower outer cover member and the side mount bracket are fixed in a state where the mating surface of the side mount bracket is pressed against the mating surface of the lower outer cover member via the lower seal member,
• a water pump case is disposed on the one side surface of the internal combustion engine body,
• the side mount bracket has an end portion on one side in a width direction that is a direction perpendicular to an axial direction of the crankshaft, the end portion on the one side being configured to cover the water pump case, and has an end portion on another side in the width direction, the end portion on the other side being configured to be fixed to an outer surface of the water pump case, and
• the side mount bracket is configured to be moved to the other side when the side mount bracket is attached and the side mount bracket is configured to be moved to the one side when the side mount bracket is detached.