Nearly all the heat produced within an engine is the product of combustion, or friction, of internal moving components. Temperatures within the combustion chamber on the power stroke can reach up to 3,000° C. During the entire four-stroke cycle temperatures can average 800° C. Approximately a quarter to a third of this heat energy is converted into mechanical energy. Exhaust gas account for half the remaining waste heat. The other 50 per cent is absorbed into the engine block and then transferred to the coolant circulating through the engine.

Failure to remove the excess heat might cause: [Read more...]