前段时间,师傅对一辆奥迪A6L进行了保养,在保养发动机的时候,师傅发现它的底盘有渗漏的油液,具体渗漏位置就是发动机和变速箱的结合处,有可能是发动机的曲轴后油封漏油,还有可能是变速箱漏油,要检查维修就必须把发动机和变速箱一起拆下才行,很是麻烦!
由于底盘渗漏的油液比较多,车主也怕是变速箱漏油,同意师傅把它们都拆下来检查。师傅经过半天的努力,就把发动机和变速箱给拆了下来,看着发动机漏油的位置,车主很是庆幸:幸好只是发动机漏油!变速箱没有一点问题。
那么,这辆奥迪的发动机是哪里漏油呢?接下来,我们就通过一组图片来简单了解一下这个过程。下图所示,这辆奥迪的底盘。一开始,为了找到漏油的位置,师傅先是把底盘漏油的位置清洗干净,然后才检查出渗漏的油液来自发动机和变速箱之间的缝隙。
经过半天的努力,师傅把发动机、变速箱以及副车架等都给拆了下来,如下图所示的情况,绿色箭头所示的是发动机舱的情况,橙色箭头所示的就是发动机。
下图橙色区域所示,这是发电机皮带轮,可以看出这个皮带轮是刚换不久的,它损坏就会导致异响;绿色区域所示的是发电机皮带涨紧轮,损坏也会导致异响;红色区域所示的是真空泵。
发动机和变速箱被拆下后,师傅需要先把它们分开,然后才能检查它们之间的情况。下图所示,这是已经分开的变速箱;箭头所示,这个位置有很多油液,师傅确认这不是变速箱油而是机油。
下图绿色箭头所示,这是变速箱油的滤芯,起到过滤变速箱油的作用,更换变速箱油时需要更换它;橙色箭头所示,这是安装半轴的位置。
下图所示,这是刚分开的发动机,橙色箭头所示的钢丝正在吊着发动机。一开始,师傅以为是绿色区域所示的曲轴后油封漏油,因为大部分发动机后部漏油都是因为这个油封密封不好所导致。
师傅经过检查发现,漏油的原因并不是曲轴后油封损坏,而是下图绿色箭头所示的这两个小孔漏油。橙色箭头所示,这是曲轴位置传感器,有个信号盘在曲轴后油封上安装,它损坏的话,发动机无法启动。
下图绿色箭头所示,这就是漏油的油孔,师傅说它的里面有一个小密封圈,小密封圈密封不好就会导致机油渗出。
下图红色箭头所示,师傅正在用起子撬这个后盖,要均匀用力;绿色区域所示,这是两个漏油的位置。
下图所示,这是师傅拆下来的链条后盖;绿色区域所示,左边的有密封圈,右边的两个是密封胶,它们的密封出现问题。车主说他在别的地方大修过发动机,就是因为上次换的密封圈和密封胶质量不好而导致漏油。
下图箭头所示,这是拆下链条后壳之后的情况,里面都是金黄色,这里面都正常,不需要维修。
那么,这该怎么维修呢?由于油封拆下就必须更换,所以师傅给出的维修办法是:更换后壳上的几个密封圈和曲轴后油封等。车友可以简单了解一下这个维修过程,主要是因为上次维修时用的密封件质量不好所导致。
原创文章,作者:cesifu,如若转载,请注明出处:http://www.cesifu.com/article/20157.html
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