The Brookings register. [volume] (Brookings, Brookings County, S.D.) 1903-1971, 1915-09-30
Expert Advice For che
Owner
Queries and Replies Covering Matters Of
Importance to the Man Who Runs a Car

10 il common practice to resrind the
cylinders when a motor is worn or ia
il better to got new pIstons and rinss?
All depends upon the condition OF
these parts. Sometimes 1t is advisable
TO regrind the cylinders. which Is the
case when they are worn oval. In this
case the fitting of new pistons is a diff
fcult job, and the previous troubles
would return again. II the cylinders
retain their circularity, then new pts.
tons and rings may be fitted.
Is II q good plan to place graphite in
tho crank case with the regular oil7
Graphite shows excellent results
when used as q lubricant for the mo-
tor. Its action Is one Of q filler, the
minute holes In the cylinder being I'LL
ed In with the graphite, thus reducing
friction and year. Some owners use
ordinary fake graphite, while others
prefer the d~efiocculated form.
There 10 a swishing sound issuing
from the neighborhood Of the right
front wheel Of my car when il is in
motion. IL seems to occur once every
revolution. What can be causing it?
There are two very likely causes Of
such a noise. 1t may be due to the
speedometer gears meshing too tightly
or the d~emountable rim has a wedge
loose. Jack up the wheel and rotate
II slowly, and you can soon determine
whether the gears are too close. If
this Is the case loosen up the arm that
carries the driven gear and move the
gear only far enough away so that the
noise is eliminated. If the trouble Is
not found in the s~peedometer gears
tighten up the wedges on the rim.
similar to that you have described. due
TO the lack OF support at this point
What, in your opinion, is tho best way
to crank a motor, with the throttle
open or nearly closed?
1t Is preferable to crank the motor
with the throttle only opened a small
amount, say an inch or an inch and
a quarter movement on the quadrant.
With some carburetors II Is impossible
to start the motor with the throttle
wide open, while with others 1t Is gen
orally done with difficulty.
have always been bothered with
motor knocking when throttle Mas
opened On a hard pull, necessitating my
rstardins the spark to the extreme lin
Il, and that, of course, reduced power.
! have been told that il was caused by
too high compression. Will il help
matters to reduce compression by rails
ing tho cylinder and placing a plate
beneath to make q larger compression
space7
The high compression reason which
has been assigned to your case Is very
possibly correct, although it might be
that carbon trouble Is at the bottom Of
the difficulty. Ii you have noticed that
the knocking continues ever after the
motor has been cleaned Of carbon 1t Is
probably due to the high compression
or to Ii loose connecting rod, wrist pin
or crank shaft bearing or part. 1t is
never a good idea to reduce compress
sion until you are sure that II Is too
high, and 1t will be better to have tbs
measured by gauge and see what II
really Is before attempting to Gu 1t
down by means Of a plate. A COM
preston pressure Of seventy pounds Is
sufficient and for ordinary purposes
you should not have higher than this.
IL 1t Is below this a reduction Of CON-
preston will reduce the power CORE
spondingly, al 1t influences the mean
effective pressure In the cylinder.
II a motor 10 equipped with a high
tension magnetic, does each cylinder
receive alternately one effective spark
and n surplus spark2
The ordinary four cylinder high ten
sion magnetic only produces sparks
when required-that Is, at the begin
ming of the working stroke. Such a
magnetic produces a spark every half
revolution or the armature, and there
fore by connecting 1t to the motor so
40 AS'oisSS Ut thC III cDttu just
the right number Of sparks are gem
Grated, since a four cylinder. four cycle
motor requires a spark every half rev.
olution. These sparks are distributed
to the proper cylinders In turn by
means Of a rotating brush which makes
consecutive contact with the four seq
ments which are connected to the high
tension wires running to each OF the
four cylinders. The distributor runs
at half the speed Of the armature, and
the two are positively connected by
gears. The two are so set that the
brush is In contact with one Of the
segments when the breaker points sep
arate and the spark occurs.
Win you kindly give me any informa.
ticn you . on soldering aluminium?
Aluminium is soldered by the use of
a blowtorch. A solder which may be
used without q fiux. Is composed OF
seventy-6ve and fve-tenths parts of
tin eighteen parts Of xinc and two and
fi~ve-tenths paris OF aluminium. The
parts should he slightly heated before
applying. The solder should be forced
~ place ~ means Ct a stif metal
brnnh. Another solder which re0uires