Conduction : Is the transfer of heat between two metals. Conduction occurs in an engine between the piston and the cylinder wall
Convection : Is the transfer of heat in a liquid by the circulation of the heated parts. Convection occurs inside the radiator of the cooling system, the hot water rises to the top of the radiator and the cooler water sinks to the bottom of the radiator which is then circulated through the engine.
Radiation : Is the heat transfer from a substance into the air. Radiation occurs in the radiator of a cars cooling system, the air travels through the hot radiator and dissipates the heat into the air. Radiation also occurs on the fins outside the combustion chamber of a two stroke engine.
A thermostat maintains the core temperature by regulating the flow of coolant into the radiator. the thermostat operates by using a sealed wax pallet that is solid when it is cold, when the engine heats up the wax melts and expands, opening the thermostat. The thermostat stays closed until the engine reaches optimum operating temperature. when it opens it allows more coolant to flow into the radiator.
Why do engines have coolant in them?
Engines have coolant in them to lower the freezing point of the water in the radiator so it doesnt freeze and crack the block or pop out frost plugs. it also raises the boiling point of the water. Coolant in an engine also prevent corrosion of the aluminium head
When should an oil filter be replaced?
an oil filter should be replaced every time the engine oil is replaced. the engine oil should be changed every ten thousand km
What projects the oil pressure and where is it situated?
The oil pump creates the oil pressure in the engine. the oil pump is connected to the crankshaft which turns the gears inside the oil pump, creating pressure. The oil pump is located on the block of the engine.
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