Tulsa daily world. [volume] (Tulsa, Indian Territory [Okla.]) 1905-1919, 1916-12-31

main bearings are taken care OF by
the pouring over oil.
When oVcrhauling "a car mechanics
should do nothing outside of clean
Ing 20 the oilinr system. There are
however. a few points which must be
remembered, when tightening bear
lugS. In the last lesson you Will re.
member that ! mentioned the fact
that the oil could not get Into the
hearing Il the pressure were very
goat one can by tightening the
bearings too much, get them so that
tho oil cannot enter. and this Is
very often done by auto mechanics,
with the result that the bearlnEr
soon burn out, You should be ablc
tn rcvolNc the crank-shau by hand
and % move the connecting rod
back and forth without much effort
The bearings should. however ut
snug"
Unless "oil grooves" as shown ir
Fig. ?, he cut in the hearing, tho oi
viii only get on the bearing IN a line
the thickness OF the OIL hole. Tn,
prootcs are therefore cut in order e
spread tho oil the entire length oi
the bearing often IN q worn bear
ing these grooves VIII have wori
away IN places and they must there
fore bc recut. This can he done viii
a Nro cape chisel or the point of
scriping tool.
Cnrc OF the Oiling system.
or course the first care OF the oil
ine system is TO see that there IS tho
proper amount Of oil in the crank
case. OF an the things You must DO
to take care of yoW car, here is one
Of which you dare not he negligent
hurncd-out bearing viii mean that
the entire engine must bc dismantled
and. II is safe TO say, that this VIII
moan at least weeks work for
Il good mechanic ana some for his
helper.
on must keep an eve on your oil
gauge ard sight glass on the dash,
so as TO bc sure that pump is work
ing properly. Many a bearing has
been burned out because OF Il failure
Of the oil pump. As a rule when the
bearings do not get oil. they VIII
first bind and so put a great load on
tn engine. When Your engine labors
on the level. as tho II were on a steep
grade. and especially if l gets hot ana
knocks, look TO your oiling system as
I this rs a sign OF lack of fabrication.
would advise all owners to find
out what grade and brand OF oil
works hest with their ensine, and
then TO buy this oil IN sealed. labeled
cans. The gas engine is "a heat en-
glnC, ana II takes an extremely high
grade Of oil 10 lubrlcate properly
where the temperature is as high as
II IS on this type OF engine. y poor
grade Of oil Will dcCompose or
"craclt" into its elements Hydrogen
and Carbon as soon as IT comes in
contact with the hot parts. This ear
ton will be deposited on the piston
and cylinder head And on the valves
wncre II will become white hot and
often ignite the gases ncforo the pis-
ton has come W on its compression
stroke and SO try TO drive the piston
back in tLe wrong direction. This
VII! cause what Is known as the
carbon knock" The carbon Will
also get between the piston rings and
often cause them to stick
When the oil. no matter how
good gets past the piston rings and
into the combustion chamber IN any
quantity. II will carbonize ns thoro
is no oil which viii stand the heat
fouaj here
Because auto engine oil must hc SO
, high grade, the habit of stopping at
tho first garage and asking for a
quart or pint Of light heavy or me-
dunn oil. is a bad one. All garage
owners are not high principlcd, ana
maLv, especially those catering u
the transcieut tourist trade, will buy
only the o,l on which there is the