how to change an egr valve

{"cid":"91191992","title":"Smart Control Car Carbon Cleaning Machine \/ Internal Engine Cleaning Machine","imgUrl":"https:\/\/img.chinax.com\/nimg\/b0\/72\/a43168eeaa91ef1e13591c502ec4-200x200-1.jpg","attrs":{"Price":"Negotiate","Brand Name":"Zeayeto","Model Number":"HO-1500","Minimum Order Quantity":"1 Set","Delivery Time":"15 Workdays","Certification":"CE FCC","Place of Origin":"China","Payment Terms":"T\/T L\/C Paypal","Supply Ability":"400 Sets per month","Packaging Details":"Wooden Packaging","Product name":"Car Carbon Cleaning Machine","Warranty":"1year","Advantages":"Car Fuel Saving","Power consumption":"4.5KW","Usage":"Car Engine Clean","Gas production":"1500L\/h"}}

{"cid":"91221885","title":"Aluminum Alloy F16D4 Engine Cylinder Head For Chevrolet Cruze 1.6l","imgUrl":"https:\/\/img.chinax.com\/nimg\/15\/ba\/81bb4c389e20fa8035db38cc6d49-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"FMH","Model Number":"F16D4","Minimum Order Quantity":"5 pcs","Delivery Time":"5-15 days","Place of Origin":"CHONGQING CHINA","Payment Terms":"L\/C, T\/T, Western Union","Supply Ability":"1000 PCS \/ MONTH","Packaging Details":"Neutral Package","Engine Code":"F16D4","Model Name":"F16D4 Cylinder head","Car Model":"FOR Chevrlot Cruze","Displacement":"1.6L","OE No.":"55565452 55578489 55570930","Engine Valve":"16V","Material":"Aluminum Alloy","Purpose":"For replace \/ Repair","Warranty":"12 months","Packing":"Carton-box package"}}