El Paso herald. (El Paso, Tex.) 1901-1931, 1921-01-01


J. Why viii not a spark in the
ignition system jump rs large a gap
between spark plug points under com
preston within the engine as u VIII
.. what IS the average tempera-
ture Of an autpm0ble engine In GOOD
condition and with cooling and lubrl-
eating system tunctlouinE properly
8. what is one way Of noting
whether some cylinders are receiving
more oil than others Of the engineer
4. How is the power OF gasoline
engine Usually 1iguredE
5. How can you tell the exhaust
valve from the inlet valve OF an en-
gineg
S. What is alcohol?
e. What would be the result ~
storage battery were discharged FAST
er than the specified rate Of dis
s. Why IS not a very thin oil used
in the transmission or differenttal2
Q. How are air cooled engines SUI
ficiently cooled by air onlyf
10. IL a short strip Of poor road
such IS mud. gravel or crushed stone
IS encountered on the roads how can
the car be best carried through IL.
Answers to Last Weeks Questions.
J. Zero weather requires almost
three times as much alcohol in the
cooling system as ten degrees ABOVE
call for about twice as much anti
freeze solution as a ten degree temp
erature- For Instance the cooling
system which has a water capacity Of
about six gallons requires four and
three-fourths piuts Of alcohol to keep
the water from freezing when the
temperature is 10 degrees above zero
For five above nine and oue-halt
pints Of alcohol are necessary and for
zero 10 piuts- To be on the SIZE
side add more alcohol If the tempera-
ture IS expected to drop below zero
About is piuts Of IL viii prevent wat
er from freezing at as low a temper
ature as % degrees below the zero
2. The function OF the automobile
engines cooling system is not 10 cool
the glsses which explode in the cylin-
ders as is often supposed. but 20 Keep
the walls Of the cylinders from over
heating The energy Of the engine is
derived from these burning and eZ-
uaudinE Easses- They should not
be cooled. but it is necessary TO cool
the cylinders 20 prevent seizing OF The
pistons within.
9. With the gasoline now IN use.
the average mixture considered best
for combustion in the cylinders OF an
automobile engine is from u 70 IL
parts or air 10 one part OF gasoline.
less air is used and more gasoline for
slow speed and power work, while
more air and less gas IS drawn into
the cylinders for economical high
speed driving or light load pulling
4 A storage battery cell. whether
large or small viii average two or
a trifls more volts OF electrical pres
sure if On good condition. size OF the
cell OF any automobile storage bat
terry has nothing 70 do with its pres
sure Additional pressure is obtained
By adding cells and not plates within
the cell The larger the cell the
longer period Of time thecell viii last
in generating electricity.
5-The single spark ignition sys-
TEN requires a closer setting Of spark
plug points than the old vibrator sys-
much quicker spark than the latter.
A spark from a nOu-vibratOr coil or
magnetic would not jump across a
vide spark pug gap under compress
sion. IL operates most efficiently at
an average distance Of not more than
-025 o. an inch.
G. Wrong valve setting or timing
VIII cause 0verheating Of an engine.
PARTICULARLY in the exhaust valve,
which If it does not open sufficiently
or II it opens and closes too early
VIII not allow the full escape of
burned gaEses I'm the cylinders, one
cause OF oVerheltinE.
Z. An engine with any new friction
or bearing surfaces should not be run
extremely fast because these sur
faces must be worn to a polish before
their best results are obtained. A new
piston has Invisible grooves on its ex-
terror surface which were formed
when the piston was made, and the
interior OF a new cylinder has very
small lnuentatlunG- These irregular
tiles are tool marks and are uuavoid-
able II high speed, and consequent
ly a high temperature is maintained