Show chevrolet news story only those who have actually gone through a motor car factory realize that practically one halt half the force works on the building ot of the motors for after all the regard in which a car is held by the public has really been built upon how well the motor functions under all conditions and how well the motor Is built depends on how fine are the measurements or limits used in the building of the motor and its parts though it is well known that in the building ot of the motors in the highest priced cars the limits to which the parts and assemblies are held are so small as to be invisible to the naked eye it Is not so generally known that such practice extends to some of the lowest priced cars on the market in the building of all the chevrolet motors at the gigantic factory at flint michigan limits are held as low as two ten thousandths thousand tha of an inch practically every part manufactured receives per cent inspection spec tion before it is fed into the assembly sem ly line then such dose assemblies are made imade as piston pin fits into piston to a limit of of an inch cam shaft connecting rod and crankshaft bearing are held to of an toch auch in addition to holding to these enfin limits there are inspections tor for practically every assembly operation such as the crank shaft and cam shaft bearing fits and alignments the piston pin and piston fits the clutch 1 alignment and the valve seating but the ake inspection does not stop here As soon as the motor has been assembled it is given the electric test that is run by an electric motor at 1200 revolutions per minute tor for from two to broo hours this test is to take the stiffness out ot of the new motor work in the bearin bearings gg and piston rings to insure smooth operation after this has been completed the motor is disassembled assembled dis washed and again thoroughly inspected then the motor is reassembled assembled re again it Is put on a test and run under its ith own power for approximately twenty minutes as a final checkup the valves are adjusted the motor tor is timed and all final adjustments made mada then the he t motor la Is put through a steam bath to remove outside grease or oil and painted with coat of lead paint ready to be placed on the chassis |