A cracked engine will reach about 60mph if you drop it off a tall cliff.
What commonly causes an engine to crack is either overheating it, and when engine bits overheat, and different parts are made of different grades of metal, steel, cast iron, brass or aluminum which expand and contract at different rates as the engine heats up, so then bearings bind up, or the piston expands to fill the cylinder and stops moving, and then the piston rod breaks and cracks a hole in the side of the engine, and little bits and pieces fly around and it doesn't run anymore. Usually the cause of an engine overheating like this, which is like a $2000 problem, is caused by a bad radiator hose which would have been a $5 solution if you paid attention to when they needed to be replaced before they leaked out your coolant and caused the engine to overheat, and you didn't notice and kept on driving because you pay more attention to your stereo than your temperature gauge or whatever funny noises and steam shooting out from under your hood.
Either that, or the next common thing in very cold climates, if you are in freezing weather and don't use an electric block heater when it is parked overnight, water can freeze inside the engine, and water expands as it turns into ice, so the ice may break seals and crack the block or head. EIther this way or the other way, the engine doesn't run anymore.
A cracked engine block or head won't last long. It will overheat and quit running. If it's caught in time, it can be welded and fixed.
A cracked block will probably not even run, as the cylinder probably isn't sealed and won't generate enough pressure for combustion. But in the event that it will run, it will probably catch on fire. A lot of cars catch on fire on the road because the can't get coolant (coolant pump dies or something) and it overheats and burns through the head gasket and creates flames, probably warping aluminum engine blocks too.
One easy cause of a cracked engine is water gets through into the piston. Water doesn't compress and the pressure can crack an aluminum engine block.
It's dead - Bury it. The crack will probably let the engine oil & coolant leak out, which will seize what's left of the moving parts.
A cracked block?
It will not produce power, and may even explode; as a piston rod may come flying out of the side of the block, WATCH OUT !!!
You may also experience heavy jerking, extremely loud noises, and even fire.
Umm blow up, stop working, running very lean/ hot, loud noises, less performance,etc
A cracked engine will expire rapidly if run. I would suggest poor lubrication (oil pump failure, oil leak, blockage) or overevving of engine to be cause
Like what will happen and is it even drivable and what causes this
