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近来,笔者在维修进口高级轿车发动机时,多次遇到发动机配气机构异响,甚至突然不能发动等情况。经拆开气门室盖检查,发现气缸盖顶上已积满了粘稠的黄褐色油泥,严重的成了厚厚的干涸的块状油垢。于是导致润滑顶置凸轮轴轴颈的油道被堵塞,随之凸轮轴轴承座被拉蚀、凸轮轴被抱死,正时皮带(齿)轮轮毂开裂等一系列严重事故。 据统计,发生这类事故的发动机,几乎全是进口的高级轿车上的高性能发动机。例如,凌志300轿车的1MZ发动机、皇冠3.0的2JZ发动机、蓝鸟U13的SR20发动机以及
Recently, the author in the maintenance of imported limousine engine, repeatedly encountered abnormal sound engine gas distribution agencies, or even suddenly can not start and so on. After the inspection of the valve cover was opened, it was found that the top of the cylinder head had been covered with thick yellow-brown sludge, which became a serious, dry blocky grease. As a result, the oil passage that lubricated the top camshaft journal was clogged, followed by camshaft bearing housings being crooked, camshaft being crashed, timing belt (tooth) wheel hub cracking and a series of serious accidents. According to statistics, the engines of such accidents are almost all high-performance engines on imported limousines. For example, the Lexus 300 Sedan 1MZ engine, the Crown 3.0 2JZ engine, the Bluebird U13’s SR20 engine and