The Washington times. [volume] (Washington [D.C.]) 1902-1939, 1919-11-01

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This column 10 devoted to thu interest Of
the autoist All questions as to care ana
apkeep. engine troubles. tours, etc. will Be
eneerfully ami fully answered by an expert
:. Questions must reach this office not later
than Thursday to insure issue In currsut
week. Address ali communications car.
Automobile Editor Washington Times, Civ
ING tnitisls of inquirer for index purposes
IL your car 10 in trouble on ths road and
you need a tow or assistance, avail yourself
Of Tho Tlmss Auto Emergency Service. 10
yours for the asking. See notics In this
zee ton.
Members of the California Automo-
bile Trade Association are being ad-
vised by the association that they
should junk old tires so cutting them
as to make them unfit for retreading
and sale to the public as worthy
goods.
This results from resolution
adopted at the last meeting Of the as
ISOLATION at San Diego and proposed
by A. v. Storer, secretary of the
Citrus Belt Auto Trades Association.
Storer's resolution sets forth that
many times these Junk tires are given
cheap retread, a good buffng, and
some camouflage and are then resold
as good tires. The result becomes an
unsatisfied customer with the entire
trade given a black eye.
So the association recommends that
whenever such old tires come into
the shop the garageman should cut
the tire completely in two, severing
the bead. also making a cut twelve
inches long through the fabric oppo-
site where the tire is severed.
Repiaeing and Grinding Valves.
1. The push rods should have been
examined previous to the installation
of the camshaft, and if they are worn
SO that they would rattle or tend
to change the timing Of the valves.
they should be replaced with over
size push rods, roaming the holes
with the oversize reamer which is \
provided for the purpose.
z. In an engine overhaul, it is best
to take no chances with the valves.
particularly if, the seats and ports
have been reamed out, as the cost
OF new valves is SO small that new
ones will far outdlstance fiddling
with the old ones
The valves should be ground. with
a fairly thick mixture of powdered
emery and thin oil, such as is ordi-
narily used for lubricating the Ford
engine. This should be mixed so that
it is not so thin that it will run down
into the parts, and 1t should be used
very sparingly.
When grinding a valve be sure that
the camshaft is in such a position
that the push rod is all the way down
or on the heel of the cam. If the
cam is up, the valve will simply turn
n nd l4
will not touch each other.
Use q Valve Grinder.
Use a proper valve grinder. II is
much easier and quicker than the
short ones that are used by owners
However, when the valves are ground
with the engine in the car, the clear
ance on the last two valves is so
small that il will either be necessary
to use a short grinder or one with a
universal joint
In grinding the valves, use an os-
cillating motion or a swing back and
forth, covering little more than half
circle each time. Every few swings
change the position of the valve and
lift 1t up little so that fresh grind
ing compound will get under the seat.
handy timetsaver for this purpose
consists IN cutting an old valve spring
so that it is just loug enough to
raise the valve about 4 inch from its
seat when the pressure is taken off.
good seat is obtained when there
is an unbroken white line all around
both he valve and the seat. 1t is
not necessary that the line be wide.
Evidence II Is Bent.
If the valve shows white on one
side only this is evidence that il is
bent and it should be replaced with
new one rather than trying to
straighten it. If only slightly bent,
it may be Strengthened by hitting it
a slight tap with a hammer when it
is on the seat.
II only one side of the seat shows
the white line, the seat is warped or
distorted and should be reamed out
with one of the valve reamers shown
in a. previous chapter.
After a perfect seat is obtained,
remove all the abrasive and wash the
surrounding parts with gasoline to
remove every particle of emery so
that there will be no chance of its
getting into the cylinder or down
into the valve guides.
The clearance between the lower
end of the valve stem and the top Of
the valve should be checked up. The
minimum distance is one-sixty- four
hundredths of an inch. and the maxi
mum distance one-thirty-second inch.
The clearance should be kept
as close as possible. II the valve is
too short it is recommended that a
new one be used rather than trying
TO draw 1t out by peening, as the ex-
pense and trouble are not worth the
difference, and a valve that is not
Dcened 70 To- Of
than one. that is peened.
In case of a valve too long, it should
be filed off, keeping the end of the
stem absolutely square.
The valves are then put in place
with the springs and cups in place
and the pins inserted in the stems
with the use of valve litter. lust
opposite TO the methoA of taxing
them out.
Miss Mary had little car: