–Important parts like Pistons, crankshaft, cylinders
–Accessories used with these important parts like valves
–Auto engine starter and other accessories used to make sure the engine runs properly
–Radiators, cooling systems, air filters, oil filters and other parts that function along with the engine.
–Engine oil and other fluids that lubricate the engine and make sure the temperature is fixed at optimum at all times.
The engine is nothing but the sum total of all these parts and components. Needless to say, these parts and components will require regular replacements. Oil must be replaced depending upon the number of miles that the vehicle runs. Normally, an oil change for every five thousand miles is considered at par. A lot depends on the working temperature of the vehicle as well.
Other parts like valves, filters, cooling fans and the spark plugs need to be replaced as and when they become defective. However, the expected life of these parts too can be anticipated and spares can be stocked to ensure you do not end up stranded on the road with a defective spark plug that does not ignite the fuel. Repairing and replacing these parts is slightly more difficult than an oil change because knowing where these parts are placed becomes very important.
The third category of engine repairs and replacement covers the core engine parts like the pistons, cylinders, cylinder rings, crankshaft etc. These parts are built to last a lifetime. The bushes and bearing may require replacement but you do not replace the piston or cylinder once every ten thousand miles.
Replacing these parts even once during the lifetime of the engine is a considered a negative mark on the quality of manufacturing. The only exception is if the vehicle has been used under trying conditions and the engine has been placed under a huge strain.
Knowledge of these three categories will help you decide how far you want to try and carry out engine repairs on your own. An amateur cannot unscrew the engine block and try and replace the cylinder without the necessary tools and equipment. Extremely complicated and technical calculations are made to ensure the inflow of air, fuel, compression of the same, ignition and removal of exhaust takes place in the cyclical and symmetrical manner.
As far as replacing others small parts are concerned, you can make use of guides and manuals and even auto repair engine kits. It is best to buy the one designed specifically for your model and make. You can find such products online at