奇瑞·A520维修手册 2.0NA发动机机械部分 12.0NA发动机机械部分 第一章、发动机参数及专用工具..................................................4 第一节、技术数据..................................................................................................................4 一、发动机特征参数.......................................................................................................4 二、维修技术参数...........................................................................................................5 第二节、专用工具..................................................................................................................7 第三节、发动机号码..............................................................................................................9 1、发动机号码位置.........................................................................................................9 2、发动机号码涵义.......................................................................................................10 第二章、发动机本体部分维修.................................................12 第一节、发动机正时校对.....................................................................................................12 第二节、轮系........................................................................................................................15 一、结构图....................................................................................................................15 二、维修指导.................................................................................................................15 1、正时皮带上、下罩盖更换...............................................................................15 1.1、所需工具和辅料....................................................................................15 1.2、拆卸步骤................................................................................................15 1.3、检查........................................................................................................17 1.4、安装步骤................................................................................................17 2、正时皮带更换...................................................................................................17 2.1、所需工具和辅料....................................................................................17 2.2、拆卸步骤................................................................................................17 2.3、检查........................................................................................................17 2.4、安装步骤................................................................................................18 3、惰轮、涨紧器、接触带轮更换.......................................................................18 3.1、所需工具和辅料....................................................................................18 3.2、拆卸步骤................................................................................................18 3.3、检查........................................................................................................19 3.4、安装步骤................................................................................................19 第三节、缸盖部分................................................................................................................20 一、结构图....................................................................................................................20 二、维修指导.................................................................................................................22 1、进气歧管、油轨、喷油器更换.......................................................................22 1.1、所需工具和辅料....................................................................................22 1.2、拆卸步骤................................................................................................22 1.3 安装步骤..................................................................................................23 2、凸轮轴、轴瓦、气门及气门油封更换...........................................................23 2.1、所需工具和辅料....................................................................................23 2.2、拆卸步骤................................................................................................23 PDF 文件使用 "pdfFactory Pro" 试用版本创建 奇瑞·A520维修手册 2.0NA发动机机械部分 22.3、检查........................................................................................................25 2.3.1、气门弹簧检查.............................................................................25 2.3.2、凸轮轴轴径检查.........................................................................26 2.2.3、凸轮高检查.................................................................................26 2.2.4、气门检查.....................................................................................26 2.2.5、凸轮轴轴向间隙检查.................................................................27 2.2.6、缸盖的平面度检查.....................................................................28 2.3、安装步骤................................................................................................28 2.3.1、装配。