Before installing the new manifolds, I sanded off as much of the soot & rust as I could from the mating surfaces. Later, I rinsed them with brake cleaner & coated them with common chassis grease, just like Ford did at the factory. I also rinsed out the open bolt holes, and the EGR inverted flare nut, lubed it with penetrating oil, and coated its threads with anti-seize.
Later, I learned that the head surface was too pitted for the grease to seal, so I had to pull both manifolds off again & re-seal with red RTV.
![45manifolo.jpg Before installing the new manifolds, I sanded off as much of the soot & rust as I could from the mating surfaces. Later, I rinsed them with brake cleaner & coated them with common chassis grease, just like Ford did at the factory. I also rinsed out the open bolt holes, and the EGR inverted flare nut, lubed it with penetrating oil, and coated its threads with anti-seize.
[url=https://www.supermotors.net/registry/media/1083968][img]https://www.supermotors.net/getfile/1083968/thumbnail/antiseizes.jpg[/img][/url]
Later, I learned that the head surface was too pitted for the grease to seal, so I had to pull both manifolds off again & re-seal with red RTV.](https://www.supermotors.net/getfile/1013716/fullsize/45manifolo.jpg)