Problems like cracked engine blocks or blown head gaskets are generally pretty rare, but they can lead to a variety of serious engine problems including overheating and engine failure. While your car’s engine block is made to be highly durable, it can normally withstand extremes of both hot and cold. However, there are several sets of circumstances in which your engine’s block can develop cracks.
The main cause of a cracked engine block is excessive heat, which usually happens when your engine lacks coolant. If you have a leaky head gasket, it is likely that your engine will be leaking coolant continuously, making it almost impossible to keep your engine properly cooled. While your car may spit and sputter along for thousands of miles with a leaky head gasket and a cracked engine block, the unfortunate fact is that, once you begin to see the signs, it is likely that a complete engine failure is immanent.