Engine is a device that can convert chemical energy to mechanical energy. Since this device works mechanically, it composed of several parts that work together during the operation. Parts are either stationary or non stationary, meaning some parts are moving and some are not moving. There are also parts that are fixed to the body yet have the vital role for engine operation. Engine can be divided into three main parts, the cylinder head block, cylinder block and oil pan. This means an engine can be disassembled into three divisions. Each main part have several parts are attached to form as an assembly.
Cylinder block is the foundation of the engine. It is mostly made of cast iron or iron mixed with other metals such as nickel and chromium. Cylinder block has large holes for the cylinder bores. Attached to the block is the crankshaft, connecting rod, piston with rings, oil pump, water pump, timing gears, flywheel, bearings, oil seals, piston liners, camshaft in some engine and drilled oil passages with oil filter.
Cylinder head block is made of cast from cast iron or aluminum alloy. Parts attached to cylinder head block are valves, valve spring, valve guide, valve seat, rocker arm assembly, intake manifold, exhaust manifold, overhead camshaft, spark plug, fixed machined or drilled parts like water jackets, oil galleries, intake and exhaust ports.
Oil pan is made of plastic or metal. Pan is shape to fit the bottom of the cylinder block. Oil strainer and oil drain plug are attached to this part.
