In a message dated 10/18/2006 12:06:37 A.M. Eastern Daylight Time, BMears9413@aol.com writes:

    We've tried pushing the cars backwards, turning it backward with
    the front shaft bolt, or pushing forward in reverse. When the
    stuck...THEY STUCK! Its obvious how much leverage this tool has
    with its gear ratio. I only recall this happening to 4 or 5 in the
    30 years I've been a dealer.
         Bob Mears
    Supermarine Spitfire

My trick was shown to me by a truck mechanic, was to warm the engine to normal and run it up to 2,000 RPM. Very slowly, pour in a pop bottle full of tap water. Add some top oil when complete. 99% of the carbon will be gone. Works on rotaries pretty well. Amazing on piston engines. Did you ever replace a failed head gasket? Notice the lone, carbon free piston?
 
 
Lynn E. Hanover