South Bend news-times. (South Bend, Ind.) 1913-1938, 1920-11-07

Overland car Model 90. The engine
gallops when in a heavy pull IN
high gear Seems TO run smooth
enough al any other time. Valves
Just been ground and all good plugs.
Tell me through your columns
whore the trouble can be. T. j.
Try cutting down the mixture.
You may find IL necessary 20 change
the specifications Of your carburetOr.
II no Improvement IS made by
changing the adjustment would
suggest that you have the service
station expert look 10 over.
Motor Please tell
me how I can stop my engine from
backfring at the CarburctOr. II
fires n few times after starting and
then doesn't backhre until 10 Is thor
oughIy warmed up. when quite hot
II fires all the time. Have just had
carbon cleaned out and valves adj
justed. S =.
Backhring when starting is due
20 a cold engine and cannot be
avoided in cold weather One or
more valve filters are probably ad-
TASTED too close 20 the inlet valve
stems. The space should be about
two thicknesses OF newspaper.
When the engine heats up the valve
stems expand and push the valves
off their seats. allowing the flame %
work back into the inlet manifold.
Motor Department; - have
new car. Can you advise me how to
tell when the spark is advanced
enough Please tell me what 20
use and how 90 grind the valves.
81 ION
/ remain. s. ".
A simple way 20 tell whether
spark is advanced far enough for
speed OF the piston at any time is to
advance the spark until the engine
begins to knock. a distinct me-
talliC knock may bee noted coming
from the engine Carb0ruudum is
mostly used for this purpose. when
grinding valve drap some cloth
around stem 20 prevent the car
borundum from getting into valve
guide. also place cloth in the cyl
fnder port. Then apply carborun-
dun on seat OF valve. replace valve
on seat Use a large screwdriver or
valve grinding tool and turn valve
with backward and forward move
ment. raising NJ intervals 20 change
position on seat. This should be
done until all marks disappear and
clear surface is obtained on valve
and valve seat
Motor Depa rtment.-WouId YOU
please let me know what they mean
when they say my car IS Ceared
four 10 one. and how can I find out
how 10 do #? Thanking you IN ad-
vance. / am. OWNER.
The rear axle ratio IS usually
meant by such a term. You can de-
term,ne the gear ratio OF the diff
ferential gears by counting the
teeth OF each and dividing the num-
Der OF teeth Of the smaller gear into
the larger. The term four 10 one
gear ratio means that the crank
shaft OF the engine completes four
revolutions % one Of the rear
wheels From this YOU viii note
that no gear reduction takes place
In the transmission. but that direct
drive is considered.
Motor Department. am recon
structing an old car and wondered
If I could install worm gear drive.
Please let me know how to go about
this. READER.
IL Will be impossible for WOW 20
install the worm drive construction
In the old axle. on account Of the
design Of the worm gear axle 10 will
be necessary 10 install "a complete
unit. This. Of course. would be
rather expensive The housing of
the bevel type differcntial is con-
structed entirely different from that
OF tho worm gear tyne.
Motor Department. find that
there is "A defective EaslJet on head
Hight and consequent deposit Of
dust on the refleCtors. VIII YOU