This sounds dangerous but I did it.. First of all your engine rotate clockwise right?? get a breaker bar with a half inch drive and a 27 mm socket, put the 27mm socket onto the head bolt, rest the breaker bar on a floor jack stand to the right. Remove all spark plugs and coil. Now crank the engine with the key so momentary, don't crank too long. I did it without a swet.

Alex