Which direction does the crankshaft turn?
Gas and diesel engines are.
There are a few super high performance race engines that run counter clockwise, but they are rare and we will never work on them.
That may be so but you have to admit that 99% of people think of a car engine when you say internal combustion engine.
http://www.speedace.info/internal_combustion_engine.htm
http://en.wikipedia.org/wiki/Internal_combustion_engine
http://www.speedace.info/internal_combustion_engine.htm
http://en.wikipedia.org/wiki/Internal_combustion_engine


