The Oskaloosa herald. (Oskaloosa, Mahaska County, Iowa) 1885-1919, 1916-04-27

This Is q quantity which has not as
vet, been worked down 10 standard
practice and varies in the different al,
Toys and also varies for different man.
ufactuFeFs. s
Can you tell mo Mhat 10 the trouble
with the two front cylinders on nay
carr They will run for days and weeks
without any troukls and then without
apparent cause will cease firing, the
eyiit Hers food with gasoline and then
heat up. The plugs seem to give good
SPARKS on every revolution.
Sticking valves would seem to be the
cause for the trouble you mention, az
only the two front cylinders are affect
ed. Probably the motor, becoming
slightly Oyerheated, causes the valves
in these cylinders to stick, resulting In
their failure to admit the charge to the
cylinders at the proper time for the
spark to ignite It. This also causes the
cylinders to hood with raw gas. You
should look carefully to see that the
valve stems have proper clearance and
that they are not bent in any way.
The immediate cause for the condition,
the oyerheating Of the motor, should
not be ignored. You should 60 over
:, the cooling system to see that It Is
perfectly clean and that all parts are
Ia good working order. This, can be
determined by opening the outlet cock
and trimming water through the system
by pouring It through the radiator IN
let while the motor Ia running. lie the
system is clogged up in any way 50
that the water does not flow through
freely 1t should be flushed out with
saturated solution Of common soda.
Although the differsntial of my car 10
we'll IubrieAtsd, | cannot stop a einsina
noiss.- What do you suOSSst2 g:,t
Probably the pinion ON the end Of
the driving shaft is meshed too deeply
i with the crown or master gear Of the
mated by moving the two gears slight
~ apart. Nest cars are equipped with
an adjustment so that the 'differential,
asa unit, may be moved from side to
side. -. ID. 81. ...,,. 49,
| s,..1 ,.,.te q. -. -T--..sa .~. a. ..s..E Isl
What advantage or disadvantage 10
there in having sixteen eams on the
cam shaft. Of an eight cylinder FHStOr7
And why do some us0 sixteen cams
and others sight2. .... IL, .
| There. 10, no special disadvantage.
/ Whether there are sixteen or eight
cams In an eight cylinder V engine de-
ponds entirely upon the design Of the
motor. You cannot arbitrarily change
from the use Of eight to sixteen or vice
; versa. Where the cylinders are d.
Neetly opposite one another and the
valves are In the v, then only one
cam shaft with eight cams can be
used. IL the cylinders are Offset so
that the side by side method Of con-
meeting rod attachment can be used,
there must be an individual cam for
each valve, or sixteen altogether. AS
compared with the cam shaft with
eight CANA, the type with sixteen -
not quite 80 simple. but that is not
anything for the car owner to trouble
about one way or the other. 1t is a
matter of manufacture. On the other
hand, the connecting rod lower end
construction is slightly more comph-
Gated W here the cam shaft with eight
cams is used, so that one design about
balances the other In advantages or
disadvantages. ..~s- -...
/ 10 there any way Of determining what
! aaAP ratio on final drive would prove
| most satisfaetory7
The gear ratio which viii prove most
satisfactory depends upon what speed
you wish to get out of the car with
certain size heels. Suppose you want
the car, to show a maximum speed of
, forty 1--we miles per hour when the mo-
! tor is operating at its maximum speed
and power. Then, Knowing the wheel
size, you. can use gear reduction
: which will give this result.
] have had three new cars burned up
and would like to have the following
I question answered: Would the gears
! In cars hurnOd have 70 be case hard
! snSd over or could they be used ~
they arS2 II they need case hardening
where could act Il dons2 ,.
| The. gears in these cars are prob,
' ably al, right. As they are all inclosed,
! the heat would have to 60, through the
housings, before reaching them, and
/ 1t is not likely that they have lost
their hardness. Any mechanic who il
experienced can determine their con.
dition by fling them slightly. A soft
piece of metal viii reveal itself to q
good file. Case hardening is done In
many plants, nearly every city, Of any
! size having factories where such work
Is carried on. 1t would probably be
, inst as cheap, however 10 replace the
| gears as to trouble with such richard,
ening Of damaged ones, and. besides,
there would be considerable expense
attaehed to 1t. In any case It would
! be advisable to, use the gears as they
/ are, later replacing any OF them; that
might prove to have been damaged,
should valves in exhaust and intak,
J be, Of the Same nnatsrisl7
/ The inlet valves do not have to be
made of as good heat resisting mate.