Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1917-12-15


expert, replied: Carbon" When asked
the reason for bringing carbon into
the question he said: The presence
of carbon is not often suspected, and
the evils which follow are oftimes at
tributed to other than the real cause,
but you can make up your mind that
carbon has q lot to do with it,
The motor appears to be sluggish,
does not respond readily to the throt-
tie, particularly on a hill, and the
driver blames the gasoline, the car
bureter, the cooling system and
sometimes the manufacturer. But he
oftentimes forgets the carbon end Of
it.
HE will get out the starting handle
and crank away at the motor to try
the compression. He finds that the
compression is weak, and then blames
the maker of the car for building an
engine which cannot hold compression
reasonable length of time. Before
long the engine begins to miss, and
he blames the coils or spark plugs,
and to round things up he opens the
switch after a long run and the en-
SIn0 refuses 10 stop.
Then he remembers that he had
heard a distinct knock which he
thought might be a loose bearing,
but now he knows there is something
wrong inside or the engine wouldn't
overhead so badly after the careful
handling he has given it. So he
condemns the car and all its kind and
asks his friends what the trouble is
that so many ills can occur to one en-
CINE at one time. - d"
Carbon Is the Answer.
Carbon" is the answer. 1t gets
under the exhaust valves and gums
up the piston rings so that the motor
loses compression. 1t short circuits
the spark plugs and the engine misses
explosions. 1t accommodates in
masses in the head of the cylinder,
gets red hot and fires the mixture
before the proper time. This causes
knocking which is especially pro-
aounced onAa hill, When the switch
is opened the motor keeps on running
as 1t is not using the electric spark
at ALL -... .-. :r.t =.
There are many causes OF carbon
and one must be on his guard against
all of them. The usual trouble is too
much oil, but the wrong grade of oil
will give carbon, as well as a poor
! grade. Too rich mixture from the
carburetor is another cause. If the
piston rings are badly worn oil will
be drawn up into the combustioh
chamber on the suction stroke-moTe
carbon.
Use Only Best OIL.
The remedy is to avoid the causes
given above. Use oil made by the
manufacturer of established Feputa-
b ioH5 and use the oil he recommends
for your car: See that oil level is
correct and that the mixture from
carburetor is right. If red or yellow
flame is shown at compression cocks,
the mixture is too rich. In spite Of
the best care, however, carbon will
persist in forming.
'"ro help keep this down, inject a
small quantity of kerosene in each
cylinder once a week. Have motor
hot when it is poured lin, so that the
kerosene will vaporize. Close com
preston cocks and crank engine over
few times, either by hand or self
starter. This congresses the vapor
and forces it into the carbon. The
effect of theNkerosene vapor acting
all night is to soften the carbon so
that some of It will be elected when
the motor is again started,
IF such precautions have not been
taken and cylinders are found to be
! carbonized the deposits may be too
thick to be affected by the kerosene
alone. The old method was to use
. scrapers, which were inserted through
, the valve openings. The carbon was
scraped off but fell in masses on the
i head of the piston. Unless blown out
! it was carried into the muffler. If
: not thoroughly removed ridges Of car
bon we're left, which became red hot
and caused pre-ignition Just the same.
/ Special Apparatus.
The best method, aside from re-
moving head and positive scrapihg,
| is to have the cylinders burned out
with oxygen. This can be done only
when special apparatus is available
The engine is started and the gaso-
line supply is shut off. The engine
| stops, having used up all the explo-
sive mixture in the combustion space.
This" rs to'favoid an explosion when
| the oxygen is first introduced into the
cylinder. The plugs are then re-