OCR Text |
Show Lost Compression Quite Disagreeable to Driver Do not allow your engine to lose compression. It is disagreeable to the good driver and creates a larger running run-ning expense, causing loss of fuel and power. The careful motorists will check up on compression in each cylinder at regular intervals, opening all priming cups or removing all spark plugs, one at a time, and revolving crank. If the cylinder which has its priming cup closed or plug inserted resists to a good extent his efforts to revolve the engine, that cylinder has good compression. All cylinders can be tested in the same manner, closing priming cups and replacing spark plugs in each cylinder when the test is completed. There are other methods for testing, such as listening for hissing noises on compression strokes of pistons, allowing the car to go down hill with ignition turned off and with transmission in low or second sec-ond speeds to note the resistance of the movement of the car which each cylinder offers,,, or a compression gauge may be used. |