In present complex world people are very interested to know every possible detail of the machines they use in their day to day life. And timing chain is one of the most vital parts of a very essential machine in our daily life. We are talking about cars whether big commercial vehicles or small private cars one will surely find timing chain in them. Now what exactly the work timing chain performs, it joints the crankshaft with the camshaft as a connecting bridge & effectively controls closing & opening of engine valves. Practically timing chain helps to run the engine properly. Many of us know that crankshaft revolves synchronizing with the camshaft & the connection between them is timing chain. As continuous revolution is there so its very important to check regularly the condition of the timing chain & here comes the timing chain replacement cost. If the timing chain is no properly lubricated from time to time or rough handling of the vehicle is there then the timing chain will surely get damaged. Malfunctioning or break down of the timing chain will result in complete shut down of that vehicle. If the timing chain are properly maintained (i.e. time to time lubrication & replacement) then other associated gears & parts of the vehicles will definitely last long. Obvious question will now arise how we will know its time to lubricate or replace the timing chain in our vehicles. Certain symptoms of the vehicle will let us know that its time to look after the timing chain, they are sudden vibration of the vehicle, difficult/delay in starting the engine, leaking & overheating of the engine. Its better to check your vehicle regularly or one may visit car mechanics to do the necessary work. The cost to lubricate & maintain the timing chain is very low compared to other parts in any vehicle. The time gap between each such lubrication is totally dependent on the usage of the vehicle, type & capacity of the vehicle etc. generally after 1500 km run one should get it checked. Now if the timing chain is to be totally replaced then the cost involvement is a bit high generally its cost its users $300 to $700. The cost of any new timing chain is totally dependent on its capacity & size of the vehicles. If we consider the service charges of the car mechanic who replaces the timing chain then the cost will rise little more. Certain people are aware how to replace the timing chain & they get it done by themselves, then only the cost of purchasing the timing chain will require. But it should be kept in mind that without knowing how to replace the timing chain properly one must not fiddle with it, it will not only damage the timing chain but also associated parts of it.