Put could.
We.
Who's
who's who's
who's
put
out the
WHO's.
Heat Heat tough hard on everything in the world.
Heat is hard on engines. That's why every car has a cooling system.
Did you ever wonder where the water goals in the cooling system of your automobile.
The water goes through the radiator then to the water pump which forces it on
then it enters the engine. Once in the engine this river of water flows first.
Through the jackets around the cylinders uniformly cooling the six cylinder walls.
Next the stream goes up into the cylinder head where its direction is so controlled
as to drive it against the valve seats leaving the valve seats it circulates
through the head
and after it has done all the cooling it can do the water comes out through the
halls at the top
and flows back into the radiator even though Emily Post may never approve it as
good etiquette.
The well known business of cooling coffee in a saucer is
that excellent illustration of what happens in the radiator of your car in the
saucer the hot coffee is spread out thin over a large area so
that the heat has a chance to escape the cold is only the absence of heat
and heat doesn't just disappear. It has to be carried away through the air.
Now if you blow on the coffee.
That helps a lot even more heat is carried away by the greater circulation of air.
That's why large surfaces help heat to escape fast more liquid is exposed to the
air more heat is carried away. Now it's put a cover on the saucer.
Stand it up on and.
RUN TO through it like this put a fan over here
and what have way a radiator a big surface. Plus air circulation.
That's what carries away the heat from the water in the radiator of your car.
As you can see by the smoke air is pulled quickly over all the services of the
radiator by the action of the fan which also circulates air around the engine.
As the engine gets up speed.
We get additional help in cooling air is forced more rapidly through the radiator
after a certain speed is reached.
We could do without the fan but inside the engine is.
Where the water does its work.
The temperature inside an automobile engine is just as important to the engine as
the temperature of a room is to people in an air conditioned room.
The temperature is ideal for human beings put the close to seventy degrees
but in another room. The thermometer is up to ninety degrees and nobody likes it.
It's too hot for comfort.
But even a temperature
that seems hot to us would be cold to the engine of an automobile the temperature
an automobile engine likes best isn't seventy degrees nor ninety
nor even one hundred our gasoline engine like one hundred
and eighty degrees best summer or winter and that's just the way the water is
when it leaves the engine. Each part inside the engine.
As a particular temperature at which it operates best in the water jacket close to
the cylinder wall. It's two hundred
and twelve degrees just hot enough to boil water.
Between the piston and cylinder wall. The temperature is about three hundred M.
Fifty
and inside the metal in the top of the piston it's about six hundred degrees off
enough to boil Mercury up in the combustion chamber where the gasoline burns the
temperature is about three thousand degrees and that's hot enough to melt steel
and then some
that whole working gang inside the engine asked to have just the right amount of
water in order to keep up rating at just the right temperature.
It's neither too hot or too cold. What would happen if they didn't get that water.
Well we all know what happens to metal when it gets hot
when the steel gets hot it expands.
That's why there is a gap between rails in a railroad track the gap protects the
rails from publishing when they get.
Hot
and expand foundries use the same principle in making locomotive wheels the flanges
he did until it expands then it is flipped over the wheel so that
when it cools the flange will contract again and fit tightly over the wheel.
The metal inside an automobile engine also expands when it gets hot.
And of all the water suddenly boiled away every part of the engine would over
expand. Them nothing could move and the end would almost melt it would be ruined.
That's why it's important to keep your radiator always for.
The valves which let the fuel in
and let the heart burn gasses out are at the hot spot in the engine.
They must have a special water spray they're not content with just ordinary cooling
the valve is being cool all the time it is on its seat so the cooler the sea the
cooler Lavelle to make sure the seats are cool water is squirted directly on
the valve seats the core of the seat and Val the harder they are
and the longer they will last.
This kind of cooling keeps valves working efficiently and give them a long
and useful life in the modern car all apart inside the engine
get treated to a new kind of cooling these water jackets run the full length of the
cylinder assuring uniform cooling over the full length of the cylinder wall.
This also means
that the Pistons are kept cooler as they are always running against these cooler
cylinder walls piston rings
and pistons properly cooled keep in contact with the oil film on the cylinder walls
oil temperature is kept down.
Cylinder bores remain truly round and straight all parts run cooler.
Now here's a test
that shows what the cooling system of the modern car can really do under extreme
load on that bridge or conditions on a steep mountain grade.
We're at the bottom of one of the longest toughest hills in the country.
The nine mile hills between Rockdale
and your own Arizona a real test of any automobiles cooling system.
One last check on the temperature gauge
and the testers on a modern automobile pulling a double load against on nine miles
on the road temperature of one hundred ten degrees in the case.
It's one hundred eighty degrees and we have a modern cooling system
that doesn't have to last god of any condition anywhere anytime.
It can always keep cool so long as the water boy comes around.