The one part of the engine:
First,engine assembly
Second, engine body
1.cylinder block
2.Cylinder cover
3. The camshaft timing gear (chain)
Cylinder block wear often occur in three parts: the bearing hole one (including the main bearing holes and CAM bearing hole), cylinder bearing hole (including cylinder tube bearing hole and the cylinder liner) and the valve seat hole (including valve seat ring bearing hole and valve guide bearing hole and the valve tappet bearing hole).These three parts is the most easy to wear parts of the engine cylinder block, so when designing sliding bearing alloy, installed on the bearing hole of cylinder cylinder hole and add alloy cylinder liner, valve seat plate of high-temperature resistant alloy seat, etc.
In order to use durable gets cylinder, also must give warranty have enough room for replacement parts and accessories and level.All of these parts of the grinding twist with the cylinder block is not directly related.However, due to the failure in operation of the engine and guarantee the homework carelessly, accessories material quality and the iterated overhaul, cylinder block socket hole reaches limit block will wear, even scrapped.