, 1918-05-16
GREATEST WORRY
FOR A M0T0RIST
Carbon Will Form in Best of Com
bustion Chambers and Cause
Much Trouble.
SEVERAL WAYS OF REMOVING
Experienced Man Says Best and Sur.
est Way Is Use Of Kerosene-Pour
Liquid in Gradually and Open
Throttle Slowly.

Carbon is n of the greatest wor-
rles of the motorist. 1t will form in
the best of combustion chambers.
This substance is deposited through
imperfect combustion of the cylinder
oil and gasoline. Dust is drawn into
the motor and adheres to the first oil
surface it strikes, adding to the accu-
mutation of the piston head. Eventu-
ally this deposit becomes so deep that
II is incandescent, causing premature
'%gnition of the fuel. 1t is this feature
that will prevent any motor running
smoothly.
There are many ways of removing
carbon. 1t may be scraped out with
tools designed for the purpose. There
are several sorts of chemical carbon
removers which can be injected into
the combustion chamber for the pur-
pose of %loosening the carbon and per-
hitting 1t to be blown out the exhaust.
With some types of motors it is pos
sible to drop a small chain in the COM
bustion chamber and let it scrape the
carbon off as it flies around under the
impulse of the piston.
Surest Carbon Remover.
However. the experienced motorist
says the best and surest carbon remov-
pr is n dose of ordinary kerosene.
When the engine is hot after a run
feed about three or four ounces of kerr
osene through the air vent on the in
take manifold or through the air in
lake of the carburetor while the en-
CINE is idling. The kerosene should
be poured in gradually and the throt-
Tie opened very slowly. which draws
The kerosene into the cylinders in
larger quantities than can be vapor-
lied n burned at once. In a few
minutes the excess kerosene is being
churned up and down in the cylinders,
soaking the valve seats and spark
plugs.
Many a owners inject the kerosene
through the petcocks, but the method
described above has the advantage of
uniform application to the valves.
When the oil is put in by way of the
petcocks 1t is likely to run down one
tbS NaiooI hCDooltH v liC
other side untouched.
Prevent Formation.
by giving the motor q dose of kero-
Sehe once a week 1t is possible to pre-
vent the formation of carbon deposit.
ohe Kansas City motorist has a small
'ahk OF kerosene installed in the front
Vi his car. Every day as he draws
near his home. he switches from his
gasoline feed to the kerosene for ten
mlhutes' running. He claims this
practice has relieved him from all car
oOh troubles and that his engine runs
as well al when new.
Mixtures of various sorts have prov
eu good carbon removers. Alcohol and
Aerosene in proportions Of three to
"me make a good carbon solvent, mo
'Vrsts say, and another good carbon
.'ealser is made Of two parts acetone,
parts Kerosene and n part ether.
IN preventing the formation of car
uon' the use of good cylinder oil and
,"e correct adjustment of the carbure-
'r Is necessary. The best advice Is
a standard brand of oil in guam
IVY recommended for use in the par
ltular make and model of a Some
,ers use different weight oil in sum-
and winter. AS The car gets older
me parts become thoroughly worn
ahu n trifie loose, n heavier oil is
''len beneficial, motorists say.