I got a turbo 7m lying around in the garage that i bought it from a friend. It's got a little dust on it, but it very clean oil wise in the cams place. The question i have, what's the best way to clean a head ? i got dust on it and i don't want to spray water on it to get it cleaned of or wasn't sure if i can use water. any advice ?? the head will be getting a resurface within a week or so.