Board Thread:Questions and Answers/@comment-88.212.37.71-20130226215346/@comment-5460432-20130226220402

You need water in the steam engine, hence why its called "Steam" Engine, it operates in real life through the water boiling and expanding to push a piston upward creating kinetic force. feed it water from either BC waterproof pipes or TE liquiducts. if redstone signal is on low means if it recieves no signal it will run and if on redstone signal high means that the engine requires a redstone signal to run. hope that helped. btw you need to feed it water constantly it will use water based on the fuel coal and charcoal will take 1 bucket to burn it all.