South Bend news-times. (South Bend, Ind.) 1913-1938, 1917-08-19
Information for Motor Car Oluners

level at right height. prevent over
heating, and put some kerosene into
each cylinder once week while en-
CINE is hot.
Motoring Department. The News
Times-Kindly let me know what II
meant by pre-ignition. Pre- means
before. How can ignition come be
fore ignition An explanation will
oblige. @. : T
Pre-ignitiOn means Ignition before
the proper time or before dead cen
ter just before the power stroke. o.
may be due TO spark advanced too
far. TO overheated engine. or 10 glow
ing carbon. The effect is 20 ignite the
gas before dead center. while the
piston Is moving upward This has
tendency 10 push the piston down.
slowing il down and causing a knock.
To distinguish one from another, re-
tard spark. II knocking continues
look for signs OF overheating. such
as steam at radiator IL engine is not
move a spark plug and see if it is
carbonized. II not the trouble is
worn piston or a loose bearing.
which must he attended to at once.
Motoring Department, The News
Times nave Hupmobile car 80
model 1913. 1 would thank YOU 10
give me explicit instructions on how
TO time the motor and magnetic.
Thanking YOU in advance for your
kindness. r. X. -.
First hnd hring order OF engine
and method of retarding spark. Next
set no. ! cylinder at the beginning
of the power stroke. To do this
place a piece of paper between valve
litter and valve stem on last cyl
Under Ghe one farthers from front
of carr. Crank engine until exhaust
valve on last cylinder opens and
closes. releasing the paper. Examine
hywheel Dead center mark will
have passed center. Pull fywheel
back until dead center mark is in
line with center of cylinder. Now
place "A piece of tissue paper he
tween circuit breaker paws and mag
ueto. Retard spark 10y turning
breaker box i'm the same direction a.
armature turns. Turn armature the
way the engine drives il until tissue
paper just releases. Connect gears
and fasten magnetic to engine. open
distributor and note position of dis
tributor arm. Connectspark plug wire
from this point To No. ! spark plug.
Connect remaining wires TO distrib-
utor points i'm rotation TO spark
plugs according 10 firing order. Also
rum a wire from armature OF mag
neto to switch and from switch 20
ground.
Motoring Department The News
Times have new model Ford
which has been giving me some
trouble i'm TWO ways When I retard
my spark lever far enough 10 get
proper speed and TO eliminate heat
very fast knock sets up. II sounds
as if it might he on the left side OF
the engine. have had nay engine
taken down and every bearing eN
amined. but found no worn bearings.
] nave nd0 new toullnuldlOI put
on. bat still no good. Unless | re-
tard my spark lever over tive
notches. which is not enough. the
knock sets up and my engine boils
over on l0-mile drive. I have had
my valves ground also. will Ger
tainly appreciate an answer along
this trouble. y. NJ. l..
If there are no loose bearings. the
trouble may he a glowing piece OF
metal i'm head of engine or an ac-
emulation Of carbon. Sometimes
defective water Jacket occurs IN
molding of the cylinder. which is al
most impossible of detection The
cylinder at that point overheats and
causes pre- ignition and knocking.
An excess amount of carbon is an
other cause Of overheating. Running
with spark too far retarded anC
throttle too wide open is still an
other cause These hints should help
,cu find and remedy the trouble.