^^^ I learned something! I would add it, from a rod of stainless welding rod (maybe gratis at a welding shop) & continue the search if things are running too hot. #1 accurate gauge #2A too hot at idle/low speeds or 2B to hot out on the highway. & if so then what parts (shroud/stat etc) are you running? & rad might be partly plugged EDIT a partly clooged rad might not show up at low speeds but more likely will at high speeds so if it is OK at high speeds then it ain't the rad.