Is the crankshaft bolt right or left handed tread?

Answer 1

Oh, dude, the crankshaft bolt typically has right-handed threads. So, you turn it clockwise to tighten and counterclockwise to loosen. But hey, if you're feeling adventurous, you could always try turning it the other way and see what happens. Like, who knows, maybe you'll discover a whole new way to fix cars!

Answer 2

Assuming by crankshaft bolt you mean the one at the front of the engine which usually retains the front drive-belt pulley:

It is always threaded so that it is tightened in the opposite direction to rotation of the engine. Hence loosened by turning in the same direction as the engine's rotation.