Is the Geely Emgrand engine made of aluminum or cast iron?

[SarahRose]

Geely Emgrand engine features a cast iron cylinder block with an aluminum alloy cylinder head. Advantages of cast iron cylinder block: Compact engine design with smaller size. Advantages of different cylinder block materials: Aluminum cylinder block: Aluminum has a lower specific gravity than cast iron, making aluminum blocks slightly lighter while meeting strength requirements. A lighter engine positively impacts vehicle weight distribution and reduces overall vehicle mass. In this aspect, aluminum blocks have an advantage. However, aluminum alloy materials have inferior corrosion resistance and durability compared to cast iron, and cast iron offers better strength than aluminum alloy. Cast iron cylinder block: Although aluminum is lighter, its structural strength per unit volume is lower than cast iron. Therefore, aluminum blocks are typically smaller in size. For example, the EA827/EA113/EA888 engine series have cylinder block center distances of 88mm, with some versions achieving cylinder bore diameters up to 82.5mm. After accounting for cooling water passages, the actual cylinder walls become quite thin. This results in an extremely compact engine with minimal volume - an effect difficult to achieve with aluminum blocks. In this regard, cast iron cylinder blocks hold the advantage.