To control the amount of coolant that flows through the radiator, a small valve called the thermostat is fitted in the system. The thermostat is made up with of a wax filled cylinder, valve and outer housing. When your engine is first started, the thermostats stays clouds, preventing coolant flow to the radiator and helping it warm up faster. Some cooling systems run a bypass thermostat and housing, which allow the coolant to circulate around the engine only during this warm up period. The wax inside the thermostat is designed to expend at a set temperature. As the engine’s coolant warms up it, the valve opens allowing the flow of hot coolant to the radiator.
Lack of coolant changes or insufficient corrosion inhibitor use will lead to excessive corrosion in the system. Coolant should be flushed and replaced every 20,000Km or twelve months. Over time, coolant breaks down and loses its ability to maintain a clean cooling system. Rust, corrosion and scaly deposits can build up and block the galleries inside the engine and radiator.
Corrosion caused from stray current can destroy engine and cooling system components in a very short period of time of left unchecked. Stray current can develop from poor earthling of electrical equipment. This small amount of current that runs through the coolant begins to eat away at components from the inside out.
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