Flood Damage

[75sierraclassic]

as long as the water didn't get up to the exhaust port and only in your pipes, you are fine. I would also bar the engine over first. I haven't heard of creating steam, but as you know water doesn't compress, so you can bend a valve or bust a piston by turning it over with the starter. I would first take out the spark plugs and put some oil in each cylinder, then turn it over with the starter, the oil will provide extra lube and it should spit out any water in cylinder.
Good Luck