• You will not be able to physically see a cracked engine block when you open the hood.Jupiterimages/BananaStock/Getty Images
  
  A cracked engine block is a major vehicle problem that is almost always guaranteed to lead to expensive repairs. In the case of older vehicles, a cracked engine block is often the proverbial kiss of death as the several thousand dollars' worth of repair is typically more than the vehicle is worth. There are several signs to look for if you believe your car has a cracked engine block.
  
  

Coolant Pressure

• Allow your vehicle to sit overnight so the motor is cold. Open the cap on the radiator to relieve pressure on the system then replace it. Crank the vehicle's engine and allow it to run for no more than 60 seconds. Carefully reopen the radiator cap. If the cooling system has built up noticeable pressure in this short running time, there is a good chance your engine has a cracked block that is allowing exhaust gases into the cooling system and building up pressure.
  
  

Overheating

• A vehicle with a cracked engine block will begin losing coolant out of the block as the crack grows in size. If your vehicle is frequently low on coolant or begins overheating due to lack of coolant, your car may have a cracked engine block.
  
  

White Exhaust Smoke

• Instruct an assistant to rev the engine of your vehicle. If the car puts out noticeable white exhaust smoke, there is a good chance there is water in the engine block. Water in the engine block can be a sign of a cracked block head.