My truck only had 30,000 miles when I blocked my EGR. There is about a 1/8 inch of soot built up. Imagine if the truck had more miles.
When I pull my motor for the build it will all be gone. This is why people should block the EGR the day they get there truck.
dont think i would want to clean it out with the motor runny for fear of a chunk of it falling off and running through the motor, some spots of it can get pretty hard, prob not the best thing to be in the way of a valve closing
Unfortunately that stuff is in the heads as well.
I wonder if something can be used to break it up while the engine is running, perhaps some water meth for a while would clean it out ???