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Gaskets |
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Gaskets and seals the secure machined joints, and prevent fluids and gasses
(oil, gasoline, coolant, fuel vapor, exhaust, etc.) from leaking. The cylinder
head has to keep the water in the cooling system at the same time as it
contains the combustion pressure. Gaskets made of steel, copper and asbestos
are used between the cylinder head and engine block. Because the engine expands
and contracts with heating and cooling, it is easy for joints to leak, so the
gaskets have to be soft and "springy" enough to adapt to expansion and
contraction. They also have to make up for any irregularities in the connecting
parts
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Headlights |
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Headlights are mounted on the front of the car to light the road ahead during
night or foggy days. They have reflectors and special lenses and are usually
the sealed beam construction type, with the filament, reflector and lens fused
together into an airtight unit. The most popular type of headlight is the
halogen type, because it provides bright illumination. The halogen bulb is
filled with pressurized gas (halogen) and can produce flying fragments if
shattered. Wear protective glasses for changing a halogen lamp and always throw
out the old one in the protective carton that comes with the new one. |
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Heat Exchanger |
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The "heat exchanger" is a device that uses exhaust heat to aid in fuel
evaporation. It usually is built into the intake manifold as an area where the
hot exhaust gasses and fuel-air mixture come close to each other. |
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Heater Core |
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The heater core is a smaller version of the radiator that is used to keep your
toes warm when it's cold outside. It is mounted under the dashboard. Some of
the hot coolant is routed through this little radiator, by more hoses. A small
electric fan is also mounted there especially for the purpose of directing the
heat inside the car. The principle is exactly the same as the one used in the
radiator for your engine, except that the heat is released inside the car
instead of outside. |
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Hood |
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The car’s hood consists of an inner and an outer panel. The inner panel
provides strength, while the outer panel is just a metal cover. The underside
of the hood is often covered with a sound-absorbing material. Some high
performance cars have ‘hood scoops’ which channel outside air directly to the
air filter, which gives improved performance and efficiency. The hood release
is a small lever, which is usually mounted under the dash. It is connected to
the hood latch by a cable. The hood latch has a safety feature, which requires
a second latch to be released before the hood will open. This is to prevent
accidental opening while driving. |
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