EGR Valve Replacement
• Locate and disconnect the EGR valve.
Open up the hood and look on the side of the engine block for the intake system. This is located in a similar place on most vehicles; if you're having a difficult time finding it, consult the owner's manual for additional guidance. Be sure that the vehicle is cold and hasn't been turned on for several hours when you do this, as the valve can otherwise be quite hot and dangerous to work with. Locate the valve, which typically looks like a small mushroom head or flat obtrusion from the intake system. Disconnect the vacuum hose and the electrical connector by hand, exposing the valve
• Remove the connective bolts and lift out the gasket.
Use a wrench to remove the two connecting bolts on the sides of the valve, the pipe that connects to the base of the valve. Lift out the entire gasket system by hand, being careful not to break or disturb it
• Clean the valve passages.
The valve passages often become clogged with carbon deposits. Use the scratch awl to get rid of any of these buildups, being careful not to damage the passages themselves
• Clean the base and the bottom of the valve.
If the valve has any melted or gasket debris materials on the base of the gasket case, clean these up with a plastic scraper. The scraper is helpful in that it won't cause damage to the system
• Replace the valve or reinstall.
If you're looking to replace the valve, simply set the new valve into the place of the old one, with a new gasket if necessary. Reverse the steps above to install it. If you're not replacing the valve, simply install the old one back into place.