1. Leakage of External Engine Coolant
This leak could be from the water pump, radiator, heater core, or a loose hose. Sometimes it can also be due to engine block because of cracks.
2. Worn or Cracked Cylinder
After the cylinder has been in operation for a long time, wear inside the cylinder is a common problem. This can damage the smooth machined wall and affects the sealing by piston rings. It can be avoided by increasing the bore size.
3. Porous Engine Block
This is usually caused by contaminants that enter the metal. This often happens while the manufacturing process is going on. You can’t avoid this problem because that’s where the cylinder block originated.
