I am doing work on my friends 6bolt. The head has been off of it for a while (2 months) and i am sure it has been collecting some mostiure. I am thinking about putting a little bit of oil around the 2 and 3 cy (since they are down) and they look like that might need it. Think I should worry about anything? The guy had paper towels shoved in them to collect most of the mosture. Any advice is great.