When I was getting engine work done. I had removed the EGR tubes from the headers and put the pieces of pipe back in the ports but put in a nickle to block. The other Guy working on my car decided to take the lower one out and replace it with a plug, that you can screw in.
Thing is, yesterday it blew off causing all sorts of bone chilling noises, because I didn't know what just happened. SOooo... Anyone know what the thread pattern is for the lower EGR port?
