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Show Driver Immediately Begins to Realize That There Is Something Some-thing Wrong. SEARM mSXXl NOISES Clicks and Slaps of Valve May Be Detected De-tected by Rhythmical Regularity Cause of Several Other Troubles. One of the greatest enemies of tho modern motorcar is vibration. The ef-feet ef-feet of vibration is to loosen the various vari-ous parts of the mechanism and the immediate effect of this Is felt by tho driver of the ear, who realizes that his ear is beginning to he the seat of numberless noises, which are a far from pleasant uccompaniment to n drive. P.r.t the noises are only the beginning be-ginning because the looseness that causes the noise will result in breakage break-age at no distant date, if It is permitted per-mitted to continue. The car owner, therefore, should take engine and chassis noises, not as mere passing annoyances, an-noyances, hut ns symptoms of something some-thing far more serious and should ear nestly hunt them down, just as soon as they make their presence known. Engine Seat of Trouble. The engine is the seat of the greater part of the unnecessary noises that seem inevitable in the operation of the car. The commonest engine noises are valve clicks and slaps, both of which may be detected by the rhythmical regularity of their occurrence. The reason for noisy gear operation Is too great clearance between the valve and its seat. In the ease of overhead over-head valves too great n clearance between be-tween lifter and push rod will cause the trouble. The remedy Is obviously the reduction of the clearance to the correct distance and this work should he done while the engine Is heated, because of the expansion of metal when heated, in which condition the vnlves necessarily run. While the valve system is the commonest com-monest seat of noise troubles in the engine It is not the sole location where this trouble may be looked for. The bearings in most engines are of soft metal, which must he kept copiously lubricated or it will burn and flatten out with a knock as the result. The ordinary remedy for this is to take up the bearing by removing the shim between be-tween the two halves, or else to trim the metal on the movable part. Care must be used in performing this operation opera-tion to see that the bearing touches the shaft all around-without being too tight. |