Engine Block Materials Explained: Cast Iron vs Aluminium vs Forged Blocks
Introduction The engine block is the foundation of an internal combustion engine. It houses critical components such as the cylinders, crankshaft, and coolant passages, making it one of the most important parts affecting engine performance, durability, and cost. One key factor in engine design is the material used for the engine block . The most common engine block materials are cast iron , aluminium , and forged metal blocks (usually forged steel or billet aluminium). Each material has unique characteristics that influence weight, strength, heat management, manufacturing cost, and application. This article compares these materials to help understand their advantages, disadvantages, durability, and price. 1. Cast Iron Engine Blocks Overview Cast iron was the standard engine block material for many decades and is still widely used today, especially in trucks, heavy-duty vehicles, and older engine designs. Advantages Very strong and rigid Excellent wear resistance Handle...
