Exhaust System

temperature by increasing the amount of waste heat in the

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Engine Assembly

engine which must be carried away by the cooling system.

a. Adjustments and Clearances The mechanical

c. Exhaust System. Since the exhaust system

condition of the engine itself has an important bearing on

normally removes as much waste heat as the cooling

proper cooling. Valve timing and fit of pistons, piston

system any obstruction or defect which interferes with the

rings, and bearings may increase or reduce the amount of

flow of heat from the exhaust system will throw a greater

heat which the cooling system must carry away.

heat load on the cooling system. On the other hand,

Conversely, proper regulation of temperature in these

insufficient cooling can result in excessive wear or other

parts Is required to prolong their useful life and avoid rapid

damage to exhaust valves.

wear or damage.

d. Electrical System.

Improper cooling of

b. Engine Performance The regulation of engine

combustion chamber walls may result in such high

operating temperatures by the cooling system is

temperatures that spark plugs will be rapidly deteriorated

indispensable for dependable performance, maximum

or even damaged. In turn, improper ignition, especially

power, and economy of operation. None of these are

late timing, increases the amount of waste heat thrown

possible without a properly functioning cooling system.

into the cooling system and is a common cause of

overheating.

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