Performs a wide variety of skilled mechanic work, repairing, servicing, and adjusting engine, e.g., hydraulic controls, air compressors, pumps and related equipment, fuel and exhaust systems, ignitions systems, electrical and brake components, transmissions, internal and external engine parts; grinds valves, resurfaces brake drum/rotor; changes oil, air filters, fuel filters, fan belts, radiator hoses, and sparkplugs; inspects, adjusts, and replaces necessary parts; tunes and adjusts engines. Performs complex preventive maintenance, overhaul, and repair services of on automobiles, and heavy trucks, mechanical equipment and other gasoline and diesel driven motors; performs or assists with highly complex repairs.