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Show I You Auto Know That valve leakage Is one of the most serious losses of econ-. econ-. otny In the operation of an auto-niobHe auto-niobHe for, If the valves leak, It Is almost impossible to get good compression In the cylln-' cylln-' ders, and this, In turn, exerts powerful influence over the entire en-tire performance of the car, ' giving rise to knocks, loss of power and various other ills. Iroper care of the valves and regular regrlndlng are therefore to be numbered among the "ex- v penses" which are really economics, econ-omics, for they will pay big dividends In efficiency and mileage. mile-age. Worn valve stems also cause leaks which are quite as serious as those of the valves themselves. them-selves. In this case the failure of the valve stem to lit snugly into the gulder allows air to be drawn past the stem Into the cylinder, thinning the mixture to such an extent that the engine falls to run regularly unless the mixture Is made richer, while throttling down to less than ten miles an hour is almost impossible. impos-sible. The fact that valve stems need attention is usually apparent from the hissing sound characteristic of this trouble. (Copyrlht, HI J, bj Tha Whealar Syndicate, Inc.) ij .n .' |