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Show WARN MOTORIST OF HOTENSINE 1 Instruments, Available to Tell Driver When Danger Point Is Near Motorists are given an admonition to watch the temporaturo of their engines en-gines now that the season of long drives and warmer weather is here. The universal fondness expressod by automobile owners of spinning awayi from tho city on Sunday excursions through tho country and up the canyons can-yons than which no moro commendable commenda-ble and pleasurable trips can be found, is pretty apt to play havoc with motors unless they are watched carefully 'for over-heating. "Up to a cortain point," said W. S. Chocsman, general munagor of the Cheesman Automobllo Co., "it Is a well known fact that a motor cannot develop Its greatest power unless it Is warm. But that doesn't mean loo hot. When the temperature passes a definito point tho cngino begins to lose powor, and not only that, but it also begins to get In that deadly work which every auto owner wishes' to avoid excessive wear. And to abnormal abnor-mal friction, due to over-heating, can bo traced the majority of cngino trou- bles and broakdowns. 'For Instance, when the high speed automobile mo.tor becomes too hot the enstiron cylinders naturally expand; so does tho piston. This produces a tighter fit than tho designors intended, intend-ed, and with the tighter fit cornea more friction. Tho film of oil that ordinarily keeps the cylinder walls smooth and perfectly lubricated, is burned up, and pretty .soon tho high speed piston is working up and down I a dry surface. Thoro can be but ono result -the cylinder walls bocomo scored, or, If left go too long, the pistons pis-tons "freczo" In tho cylinders. "This ontails qulto an expense to rectify, for the chances are that the cylinders will have to be reborod in order to get back the same power and smoothness. Jt Is all unnecessary, too, for now there are devices, such as Moto-Meters, that are put on the radiator ra-diator cap in full view of tho driver, that give warning when tho temperature tempera-ture is rising too rapidly. Nearly ov-ery ov-ery experienced motorist nowadays has his car equipped with a Moto-Me-j tor. He finds it saves1 him many times Its cost in ropalr bills In the course of a season." |