Evening star., 1921-12-04

overheating. brushes fitted poorly to
commutator. weak holder springs or
brushes grounded by dirt, oil or car
bon particles.
4. The new engine requires more
frequent cleaning and draining of
crankcase oil than one which has
been long In use, because of minute
chips or metal particles, which are
The new car should be well fabricated
too much attention cannot be given
ft-and nothing but the best of lubri-
cants should be used. The first clean
ing to crankcase should be given
away the old oil, fiush the motor base.
remove Oil pan and clean and then
refill with fresh oil. After 500 miles
more repeat the process Thereafter
1t Is good plan to clean the engine
after every 500 to 700 miles driving.
5. Brake horsepower Of an engine is
horsepower delivered at the crankshaft.
6. 1t Is possible to mount a straight
side tire on quick detachable or split
c!incher rim. but the practice is mad
visabie because the clincher rim will
cut the side wall Of the tire near the
oead IN other words, the straight-side
| tire Will be rim cut If used for any
length OF time on q clincher rim.
T. TO remedy the squeaking and slip
ping OF brake bands, IL adjusting them
does no good. apply small amount Of
Kerosene between the band and drum,
| reyolve the wheels and apply the brakes.
The kerosene will cut grease upon fric-
ton surfaces and will remove the
squeak.
.. To treat spark plug threads 80 the
plug can be removed easily no matter
! how long 1t mas been in a cylinder apply
graphite in powdered form to the
| At the cylinder go that it may be
screwed in the greatest part of the
| thread without the aid of a wrench, the
/ wrench being used simply to give it a
nnal Tightening and prevent leaking.
.. Loading up" Of carburetor
| carburetor after 1t has passed. into the
inlet manifold in spray FORM If too
much OF the fuel is sprayed into the
| man1fold. or IL 1t is not properly vapor-
| ized and drawn on into the cylinders,
part OF this spray will condense and
flow back to the carburetor along the
/ sides OF the manifold. II the manifold
is cold condensing is increased. The
result Of this loading up" is irregular
| running Of the engine, gasoline passing
| into the carburetor's air inlet and MAX
| ing its action uncertain
| 10. To increase the mileage of a tire
| 1t should be inflated to a greater pres
sure. This is invariably the rule, as the
| average motorist does not carry enough
| air In his tires. Increasing air pressure
OF course, decreases the cushioning ef-
| feet OF the tires, so to maintain proper
air pressure and enjoy cushioning so
necessary to comfortable riding. change
to diversified tires. The diversified. tire
| need not be inflated to as great a pres
sure as the tire considered as standard
! for the car, as the former is built to
| carry greater load than the latter at
| the same number Of pounds pressure
Thus with less imitation you obtain more
cushioning from the tire, with no dan
ger of shortening its life by under in
! flation. as would be the case with the
| standard size tire.
This Weeks Questions.
/. How should the spark lever be
manipulated for starting and driving
the car:
2. Should air pressure in tires be in
| creased in cold weather?
3. What causes an engines oil gauge
to vary in registering the amount of
pressure of oil. circulating in the en-
gine?
4. Why is a hydrometer used to test
the solution Of a storage battery?
5. Should the auxiliary air opening
in carburetor manifold be. open in
cold weather?
6. Why should not a wire be placed
across the positive and negative ter
minals of a battery to ascertain its
condition by noting its spark?
Z. In what condition should a tire
be for ,retreading?
s. How much additional clearance
do aluminium alloy pistons require
than the cast iron piston. and what is
the clearance of both?
g. How can a clutch be held in the
disenEaged position for application
of neatsfoot oil or other remedy to
prevent slipping?
10, Can transmission gears be shift
ed absolutely noiselessly with the
gear shifting lever?
,copy r,ent, 1921, Thompson Feature service)