1. I'd use brake cleaner and a toothbrush on that, buy a few cans of the brake cleaner and just soak it all down, you might not be able to get to every spot with everything put together but it should clean most of it off
2. sometimes older gaskets can seal just fine, but once you break the seal by removing the part they won't ever seal again. you might be fine reusing the gaskets but I'd replace them anyway just so you don't have to risk doing the job twice |