Oh OK now I understand, he wanted you to rotate it to oil the cyls because he fired it up to break it in that leaves the cyls pretty much uncoated. I knew I was missing something as I'm sure he's competent (other than the fact of him being a gm type of guy ). Not familiar w the Marine fogging but anyway you can adequately coat the walls with something fairly thick that will stay put then it doesn't need to be turned over. Yes undo the rockers until all valves are close d & can just let the rocker arm assys lay there loose. I'm glad I could help, got a couple of hours before the AFC football game starts EDIT Hearing gm started my blood to boil so I'm gonna test him here, did he drain the oil/filter after he broke it in