If this was open to the elements then I'll bet you'll find at least one cylinder full of water - and any attempt to turn it over might be fruitless. Your rings will be rusted to the cylinder walls... You'll probably just want to bite the bullet and pull off the head and see.

-Boyo


'48 Willys CJ-2A / '55.1 Chevy 3600 / '66 Austin-Healey 3000 / '04 Volvo wagon (parenthood!?)