A blown head gasket is all about heat and the controlling of it. If regular maintenance is carried out there is a lot less chance of having this problem.
A head gasket sits between the head and the block ensuring that water and oil do not mix. The water is there to cool the engine, the oil to lubricate. If the radiator is not operating efficiently, the thermostat has failed closed, the water pump is not operating properly because of a worn bearing or weeping seal, fan belts are worn and not transmitting power, coolant hoses are clogged and not as clear as they should be or are too soft and closing with the pressure, coolant levels not correct, too much rust and scale within the engine and radiator or even the oil hasn’t been changed for too long reducing its viscosity, all can contribute to a build-up of heat.
As the heat rises the viscosity of the oil reduces… which creates more heat. Ultimately something breaks… it may be that the coolant boils and overflows… possibly a radiator hose blows etc… finally all the pressure of low cooling affect the cylinder head gasket. It can no longer contain the chemical reaction of detonating fuel when there is insufficient cooling and so the gasket fails or the cylinder head cracks or warps. Well the recommended solution for this are the head gasket sealers and guys at My Lab Guide have done a great job testing, choosing the best ones and finally giving you the full reviews about each and every head gasket sealer. And of course you will get the best deals on their website for sure.