My egr tube connecting from the rear exhuast manifold to the intake manifold is loose. Instead of trying to fix it I am looking to plug the hole on the exhuast manifold. Does anyone know the measurements on the threaded side of the egr tube. I looked through the entire service manual and could not find anything. Also if anyone has any experience with this should I use a gasket + plug to seal it or should I weld the hole shut? Attached is a picture from the manual, the egr pipe is 8*2. Thanks for the help.