A professional who repairs internal combustion engines in factory service departments or repair establishments, according to company specification charts, using machine tools, handtools, and measuring instruments. Respnsibilities include:

• Positions and bolts engine to test stand.
• Tests engine to determine malfunctions, using instruments, such as vacuum gauge, compression gauge, and exhaust gas analyzer.
• Disassembles engine and cleans parts, such as cylinder heads, pistons, ring grooves, piston domes, and cylinder sleeves, using cleaning solvent, sand blasting equipment, grinders, and wire brushes.
• Rebores and hones cylinders, and turns and undercuts armatures according to chart tolerances, using lathes, grinders, boring and honing machines.
• Repairs, replaces, or adjusts parts, such as valves, valve guides, and tappets, using valve grinding machine, screwdrivers, wrenches, and feeler gauges.
• Assembles and starts engine and adjusts carburetor and distributor to ensure smooth performance.
• May test and repair turbo-superchargers.