[924CarreraGTP]

Holy Jesus, please take a pressure washer to that engine bay before you reinstall the block! lol I would have left the intake on, stripped the wiring and pressure washed the whole engine before dissassembly. It was full of coolant anyway. That way you don't introduce dirt into your closed system.
Take my word for it, don't do this with the transmission. Many people have problems with clogged valve bodies because they renew the filters and introduce all kinds of sand and crap into the pan. Mercedes cleans the pans with degreaser, and then removes them and cleans them with lint free rags. When I did my trans filter, I cleaned the pan with a whole can of brake cleaner. I held the pan upside down to make damn sure there was no grit left anywhere. So far shy of a slip once in while my 928 shifts good.
When I bought my 928 the sound deadener foam had fallen out all down into the engine. I took a vacuum and built a small attachment that sucked out all the debris.
Sorry, I'm a clean freak but my cars are clean upside and down.