Honolulu star-bulletin. [volume] (Honolulu [Oahu, Hawaii]) 1912-2010, 1916-09-09

"
maIufaetures and conditions OF re,
pair recording to the Motor Print
The nIst thing to do IS 10 follow dill,
gently the .automobiIes for sale" ad.
vertisements BY doing this for a
week or so you will be able 10 gain
some knowledge OF current prices Of
models, which win HELM you TO tell
whether any real bargains are TO be
had and where 10 find them, ~.
After you have examined various
machines and feel that you are salts
fled with the model and general out
ward appearance OF the desired car
you should next give II p thorough me.
chanicaI inspection. Tf you are a
novice II would be well to take with
you friend who has had some exten-
eive experience with cars and upon
whose advice you feel that you can
rely. So -.
Test Compression - 70
First go to the front Of the ma
chine and take hold of the crank
handle end proceed TO turn over the
motor This is known as testing the
comnression" and is quite an import
ant feature. as by this fest You can
JUDGE the internal condition OF the
enRinA. By catching the handle in the
Hitting position and puiling upward
and over you will meet with strong
resistance. which is the compression:
IN one OF the cylinders At the end Of
the stroke the motor Will have tend.
encv to turn over half turn by itself
until Il reaches the commencement
Of the compression stroke of the next
cylinder. linen repeat the operation,
noticing the resistance offered to your
MT and continue untiE you 4 have
tested all the fcyiinders.
This test dis6Iosese the equality OF
the pressure produced in each one of
the cylinders, and in any motor which
IS In GOD condition this pressure or
romprfssIon should seem equal at
frery7bnll up. II no resistance is felt
ID anx one Of the cylinders then 1t IS
c|aseed as weak" The remedy for
this IS either grinding or adjusting
The valves, or replacing the ringso
the piston OF that cylinder
Listen for knocks
After the compression has been
iefted|and passed upon fayorably lift
the hood that covers the motor and
ask the demonstration to start the en-
EIne fbf you. While having the motor
run at the various speeds listen care
fully 1tr the presence Of any thump.
knock or tap. OF course, the noise
|tssneBs Of motor in motion is proof
Of its perfection, but you must not
expect this condition in used car
unIeseit be of the latest manufacture,
Tor YOU must understand. that all
machinery is subject to wear and tear
and consequently to the production of
Should any knock make itself pre-
.0UinInt, however, then there is
..Uetlling serious which needs atten-
|'|I While IL may not be anything
Ideally wrong at the same time it
nay become so and necessitate the
|IinI Of expensive repairs. For. Inn
..1iate purposes the only "knock"
Hat need be noticed is one In a bear
.I which may be recognized most
Item rs a dull or heavy metallic
mock, heard at every revolution of
Ne motor fly wheel This may be ac-
.Entuated by the short circuiting of
me or more of the spark plugs, in
urn, BIZ placing screw driver against
me OF the plug terminals at the same
Inc touching any metallic part of the
-
his would require the attention of a
mechanic and should be remedied at
.0ce. Nearly every other knock or
.n that might be heard can be
Eliminated by slight adjustments to
he exterminal mechanism.
famine Driving Shaft
While examining the motor, look
veil Tor any cracks in the cylinder
|1lls, crank case, supporting arms or
[hassis that would tend to weaken
he structure of the machine. Then,
TOO, note the smoothness with which
the engine runs and ask to have the
cutout open and listen for the regular
and even staccato of explosions as
they are exhausted Should there seem
10 be q miss in their regularity, there
would be need Of further adjust
ments. for the miss may be caused
BY broken or dirty spark plug, tight
valve adjustment, carbon deposit on
the valve seat. poor contact in ignition
system or bad mixture in the carbur-
etor. II any of these things is at
fauIt have 1t remedied before finally
accepting the car ~..
Another important point to be I'M
spected is the condition of the driving
shaft and the rear END, which may be
easily discovered BY lacking up one
OF the rear wheels and turning il
backward and forward slowly. If there
IS any wear in the universals or the
drive shafts il will at once become
apparent through clacking noise as
YOU roll the wheel Likewise the
play or wear in the differential can
Re easily felt as you hold the wheel
firmly and twist it. If the universals
are much worn they should be repair.
ed. for their poor condition will tend
toward running the clutch, transmits
sion and differential.
Providing that your examination of |
the motor ASs proved nothing to be
worn beyond reasonable repair, go