Engine Introduction The burning heart of our fast cars, yeah you are right, I am talking about engine. It’s the power unit we have to spin our car wheels. The entire thrill we have got while driving depends on the capacity of this power unit, and the limits up-to which we can push its components to operate safely. It is the combination of all parts of an engine that makes a car to move faster and faster. So let’s just dig out what it’s components are, and how precisely they must be engineered to get the maximum power out of an engine. Main Parts of an Engine 1. Engine Block Image source Engine block is an important parts of an engine. It is made by pouring the molten iron or aluminum alloy into a mold. The mold is made such that we should have required number of holes in the casted block, which are said to be the number of cylinders of an engine or engine cylinders. The diameter of these holes is called the bore of an engine. We have