Evening star., 1937-08-22

the latest engines have fabrication ia
the piston pins fabrication on sons
is still Of the splash feed type, although
there are newer versions of this once
general type Of engine oiling. Pts.
tons are Of wide variety of types.
and there is no Standardization as to
the number Of piston rings needed for
best results.
There are some marked differences
In chassis construction and in the de-
sign OF many of the major units.
While there has been a marked trend
toward hpyoid rear ends, for instance.
there are many differences between
the different types of hypoids. Some
are decidedly better In design and con-
struction-a fact which prompts tho
well-informed motorist to take what.
ever steps are needed to safeguard
himself against bringing on unneces-
sary troubles through moments Of
neglect. Universal joints are found
with needle-type roller bearings, ball
bearings and fabric connectors. This
calls for wide variation in lubrica.
ton, ranging from special light oil 10
no OIL or grease at all.
Some cars drive through the spring,
on the Well-known Hotchkiss principle.
Others are driven" through toroue
tubes or rods. These rods or braces
may or may not need fabrication
where they are joined to the frame,
That brings us to the transmission,
ct f,r !, Il
Most OF these today are due to diff
ferences in the method used to effect
synchroniza ton Of the gears. Further
differences are obtained as a result
OF the addition of free wheeling or
overdTive mechanism.
NOME conception Of the inability OF
motorists 10 grasp the changes
that have come about in their cars
can be had from the sad picture OF
the modern owner trying to give the
carburetor richer mixture in order
to get better performance from the
engine Invariably he tries for this
extra pep b. enriching the idling mix
ture, which is the only one he is able
to control. This means that the en-
CINE loads up when idling. gives no
better performance at speed because
the high-speed Jets are fixed and can
be changed only by repla acement with
one Of larger or smaller size. To
obtain better performance he might
better check the ignition timing TO
make sure that it is not slow. Also
the acceleration pump is the part to
consider when the engine does not get
away as it should normally
Much trouble is found as result
OF owners trying to make over their
cars, The manufacturer is suspected
oftlmes OF not knowing his business.
l am reminded of the chap who re-
wired the engine because he found
that the ignition wires did not go TO
the spark plugs in the same way as
the firing order suggested. He did not
notice that the distributor rotor dis.
charged at two ends. so that the igni.
ton wires had to have a different
order
Some engines won't stand speed
others are subject to valve stickaee i;
operated too consistently around the
city. Clutches vary widely in their
ability to take it. Not uncommon is
the clutch that goes to pieces around
$4,000 miles Wheel bearings have
comparatively short lives on some en-
glnes. There is so much difference
between knee action units that one
required lubrica ton at only two places.
while another required ouing at 14l
Is it any wonder average maintenance
fails completely to meet the needs Of
anything but average automobiles?