The EGR valve is the heart of the emissions system on an engine. EGR is an acronym for Exhaust Gas Recirculation, and that is exactly what it does. This wonderful environmentally-friendly device opens up during certain engine conditions and allows exhaust gases to recirculate back through the engine for a second time. This process drastically reduces harmful nitrogen oxide (NOx) emissions that contribute heavily to smog. In this article, you will find information on the function of the EGR valve, along with how to clean the valve and why it often needs to be cleaned or replaced.
EGR阀过着艰难的生活。实际上，它可能有一个最艰难的工作现代引擎上的任何部分。它不断受到车辆可以产生的最热温度的惩罚，并用未燃烧的燃料颗粒锤击，这些燃料被称为碳。EGR阀足够细腻，可以由发动机真空或计算机控制，并且还具有每次运行发动机时承受1000度充满碳纤维的废气的能力。不幸的是，一切都有限制 - 包括EGR阀。
碳在EGR阀内部开始留载了数千个驾驶周期，限制了阀门作为排气门户的工作的能力。这些碳沉积物变得越来越大，直到EGR阀无法正常运行。这可能会导致各种可驾驶性问题，而这些问题都不理想。发生故障时，有两种主要补救措施：清洁EGR阀或更换EGR阀。
第2部分，共2部分：清洁EGR阀
需要的材料
- 基本手动工具（棘轮，插座，钳子，螺丝刀）
- Carb & choke cleaner
- Gasket scraper
- 尖嘴钳
- 塑胶手套
- 护目镜
- 小刷子
步骤1：卸下任何电气连接器。Begin by removing any electrical connectors or hoses that are attached to the EGR valve.
Step 2: Remove the EGR valve from the engine。此步骤的难度取决于车辆的类型以及阀的位置和状况。
It typically has between two and four bolts holding it into the intake manifold, cylinder head, or exhaust tubing. Remove these bolts and lift out the EGR valve.
步骤3：检查阀端口是否堵塞和堆积。还要检查引擎本身上的相关端口。它们通常被碳堵塞几乎和阀本一样糟糕。
如果被堵塞，请尝试将大块碳钳与针头钳去除。将碳水化合物和choke清洁剂与小刷结合使用，以清洁其他残留物。
步骤4：检查EGR阀是否积聚。如果阀被堵塞，请用碳水化合物和cho骨清洁剂和小刷子彻底清洁。
步骤5：检查热损坏。检查EGR阀是否由热量，年龄，当然还有碳堆积造成的损坏。
如果损坏，那一定是更换。
步骤6：清洁EGR阀垫圈。Clean the gasket area on the EGR valve and engine with a gasket scraper.
确保防止垫圈的小块掉入EGR端口的发动机侧。
步骤7：重新连接EGR垫圈。Once everything is cleaned and inspected, replace the EGR gasket(s) and attach it to the engine according to the factory specifications.
Step 8: Check for any leaks。Test the functionality with guidance from a factory service manual and confirm that there are no vacuum or exhaust leaks.
第2部分的第2部分：更换EGR阀
由于年龄，状况或车辆本身的类型，EGR阀有时可能会造成问题。如果您在以下步骤方面遇到困难，最好与expert。
Materials Needed
- 基本手动工具（棘轮，插座，钳子，螺丝刀）
- Gasket scraper
- 塑胶手套
- 护目镜
步骤1：卸下任何电气连接器或软管。Begin by removing any electrical connectors or hoses that are attached to the EGR valve.
步骤2：卸下将EGR阀固定到发动机的螺栓。通常有两到四个在车辆之间。
步骤3：来自交配表面的刮垫材料。确保不要将任何碎屑丢给发动机的EGR端口。
步骤4：安装新的EGR阀和阀垫圈。根据工厂规格将新的EGR阀垫圈和EGR阀安装到发动机上。
步骤5：重新连接软管或电连接。
Step 6: Double-check the system。Test the functionality with guidance from a factory service manual and confirm that there are no vacuum or exhaust leaks.
EGR阀s are simple in the way that they work, but often not simple when it comes to replacement. If you don’t feel comfortable replacing the EGR valve yourself, contact a qualified mechanic such as one from YourMechanic to更换EGR阀为你。
