Omaha daily bee., 1910-02-20
,FHEN CAR IS ~OVERHLULED
Hints to the Owner and Driver in
r Giving Machine Dressing Up
GO OVER THE AUTO OFTEN
Wot a DifficuIt Tnsk 20 Grind valves
~ the Proper Directions Are
Clearly Followed out
" In detail.

weekly and monthly attention, tmS over
hauling Of certain parts is not enough to
keep a car in the pink OF condition A
thorough overhauling OF the entire car
IS occasionally required, that the needed
repairs may be made. IL is only by this
!. thorough overhaullng that the owner can
hget a good Idea OF the cars condition, as
certain what parts show wear, and cor
rect wrong adjustments. which may have
been previously made.
The principal reason for knocking down
tho engine Is to find the exact condition
of the pistons and bearings, as well as TO
clean out thoroughly any carbonized OIL
that may be found adhering TO the cylin-
der walls. Make It a point to clean each
and every part as IL Is taken apart. This
should apply to nuts. bolts and other small
parts as well as to the larger parts OF the
car. DO everything In a methodical man
ner. taking ample time. Many amateurs
are prone to litter up the workroom with
the various parts of the car, laying every
thing down in the most handy place.
Avoid this confusion of the parts by pro-
viding a sufficient number OF boxes to ac-
commodate the several units Of the car,
and keep everything pertaining 10 a certain
part IN its respective box. As soon as one
part Is unjointed or uncoupled, insert its
pins or screws in their proper place before
aside This will prevent any small.
\ parts from being misplaced and save an
noyance when putting the car together
again.
To begin, the carburetor, pump, wiring,
spark plugs and any other movable part
fastened to the engine should be removed.
When removing the magnetic the gear
wheels Of the engine and the driving pinion
OF the armature shaft should be marked
III -.,u,t. n the nnfpf whore thew
mesh, IL not marked already, BY taking
this precautlon the magnetic may be as
sembled on the car in it's proper place
without disturbing the original ignition
timing OF the car. Each valve should be
marked as it is taken out, that each may
be replaced in its proper seat. II will be
convenient to number them l. 2, 3, ETC.,
by punch mark.
The cylinder castings may now be lifted
off the pistons and removed 20 the work
bench. Some workmen prefer to lift
cylinders and pistons off together; this
IA a good plan If a helper is at hand, but
pore difficult for one man than Hitting the
cylinder alone. But in assembling without
assistance. and especially when the cylin-
ders are cast In pairs or EN- bloc, the
weight of the cylinder casting is con-
siderable, and it Is much less laborious
AhA6N - CAAAR AAS ~ - WNN N
plstons in their respective places. and so
avoid holding up the heavy casting while
fitting the cylinders. Then uncouple the
connecting rods from the crankshaft and
remove rods and pistons together. Before
taking down any part OF the car 1t is a
good plan to first clean out the cylinders
with kerosene to remove any oil and so
often deposits Of carbon adhering to their
walls. II the deposit is light this soaking
may be all that is necessary, but where
a considerable amount Of carbon has
gathered in the combustion chamber the
walls must be scraped, either with a suit
aAle carbon scraper, sold for this purpose,
~ with a file bent and sharpened to a
cutting edge. All the piston rings should
be clean ard bright; IL any black streaks
are found, It is a certain Indication OF leak
age. All worn piston rings should be re-
placed. Examine the piston pin with a
view to possible looseness and wear. 1t
Is important that this pin should be q
tight fit. otherwise it may work out and
in1ure the cylinder walls. A loose piston
pin may be due to the set screw becoming
loose, or II may be caused by wear. In the
latter event the pin should be replaced with
n new one Of the proper diameter and
length, Thoroughly clean the piston, rings
and pins with gasoline.
~ NaANch 0nOuI0 Sc arOunU.
The valves should be next attended to.
as the chances are they need grinding.
This is not a difficult task, and if the d.
~reetions are followed the amateur should
be able to turn out quite as good a job as
the garage. Procure emery OF the grade
known as 100, put a small quantity in a
saucer ana add kerosene (gasoline should
not be used, as it evaporates too rapidly
TO make a hin liquid paste. Then add a
few drops OF heavy lubricatIng OIL to give
the mixture a little more body. Put a
Nsmall amount Of the grinding mixture on
the face OF the valve and it's seat, insert a
screwdriver in tho valve slot and rotate
in It's seat. This is easiest done by rolling
the handle OF the screwdriver between the
palms Of the hands, first one way, then
the other. Do not use a greater force thar
Is necessary to turn the valve In its seat
Lift the valve up occasionally, turn IL
partly around i'm its seat and rotate as be-
Wore until the valve and it's seat show a
bright ring the entire way around. Renew
the grinding mixture occasionally, but re.
member that a small quantity Of emery
and plenty OF kerosene and oil will moi
Only make a smoother Job, but will also dc
It much more quickly than a large amount
Finally, the valves and their seats should
be washed with gasoline to remove every
particle Of the grinding mixture.
The eamshafts in most cars are removed
by taking off the cover Of the case which
ineloses the timing gears and pulling tn,
oamshafts through this opening. All mod.
ern cars have the orankshaft gear marked
and another mark between the two teeth
OF the timing gear on the camshaft, Wher
assembling, the single marked tooth should
be inserted between the two teeth as desIR.
mated. Breakage or undue wear of IN,
cams is a matter which only IN. ttet,r,
experts can handle.
Cleaning the radiator Of grease an,
scale that may have accumulated rs hes
done after the car is reassembled ana N
running order. The writer's method is tf
dissolve one-half pound OF I've in a buckle
OF water stirring until dissolved. Thb
should be strained and the radiator file,
with the mixture. Run the engine for fiy,
minutes and allow TO stand for a quartz
OF an hour, then drain off the mixture an,
ful up with clean water; run the engine 10
a couple OF minutes and drain off again
Three or four rsnsings should be given l.