he Engine Wears in<br >llore Ways Than One<br >!I.<br > mgme Wear<br > [11 automobile engines and other mechanical components of a car<br > ~larough a three-stage life. When new， they are subject to a very<br > ~wear rate as parts mesh with each other and metal is shaved off<br > 11 the parts find satisfactory mating surfaces. This initial stage of<br > It is relatively rapid but is nevertheless extremely important in<br > ~ining the total life cycle of the involved parts. Once the parts<br > meshed properly， a zone of minimum friction is established; the<br > ~ism， whether it be an engine， transmission， or differential， goes<br > lugh a long period when measurable wear is almost nonexistent.<br > n at some point in this wear cycle， as even this slow wear takes its<br > the mechanism enters stage three and finally begins to wear rapidly<br > eventually fails.<br > he main thrust of this book is simply this: to delay the onset of<br > three， the final wearing-out process that takes place in an engine，<br > prolong stage two the steady， slQw rate of almost unnoticeable<br >
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