El Paso herald. (El Paso, Tex.) 1901-1931, 1920-04-17
WORN PIST0NS
CAUSE TROUBLE

~ men q motor starts 1umDluE ON
the owners first thought Is. What
caused the troublsf7 and HIS next
How can remedy matters tenn
porariiy without going to q great
deal OF expense yet Be sure OF ef-
licleut operation until the time Genes
Tor overhauling2 Lastly. he thinks
OF ways ana means Of remedyinE the
trouble permanently when the car fs
orerhauisd IN the regular course Of
events.
Poorly fitting or worn pistons and
rings and worn or scored cylinders
are usually at the bottom OF the
whole trouble OF course, the use OF
grade Of oil unsuited 70 a pa-ticu-
lar motor or toe light. a grade OF oil.
wiz not Improve matters, and a weak
park I'll also aggravate the trou-
pie, as the charge OF gas VIII not be
entirely consumed. so that any excess
OF Oh present Is likely 70 be de-
posted on the plug, under the valves
OF on the cylinder or piston in the
FORM OF carbon. However. these are
nur secondary causes ordinarily In
other words IL the cylinders, pistons
ana rinEs are in good order little
trouble Is likely to be experienced in
the way OF oil pumping even II the
spark Is a little weak or the wrong
Grade Of oil g used
Carbon knock Indication.
The best way 70 overcome the
trouble temporarily viii DEPEND
largely upon the form N which the
difficulty manifests itself In some
motors a carbon knocF Is tie fir-f
Indication OF trouble; IN others the
valves gun up and the motor loses
compression, while IN stil other cases
the worst difficulty resulting from
oil pumping takes the form OF con
-inuai toulinE Of the spark plugs
After carbon has once formed. the
only way 70 remove 70 thoroughlT e
70 scrape Il out.
II the valves gum up from too
much OIL. the remedy Is very much
the same as when carbon forms ia
the cylinders, as Il is carbon In a
soft Eummy form which causes such
valve trouble In this case, however.
Z Is necessary 70 grind in the valves
In addition 70 removing she carbon
and preventing Its return.
Stopping 70 clean or replace q
1ouied spark plug Is always annoy Z
ing. Fouling OF the plugs as q re-
suit Of oil pumping can sometimes Z
be overcome by fitting Erreetells, OF !
male and female elbows in the !
elbows VIII usually drain out again /
before Il can foul the plugs. Need j
less to say, these els must be IN
stalled IN sets, otherwise the com I
Change in spark Plug.
Very often the uss OF a different
type d spark plug VIII stop foul
4AA TINS NaAA Only De AlAE- lA4-l4z-
By experiment. A double plug in
stallation, firing n series. in each
cylinder, or a simple plug with two
points firing IN SERIES in each
cylinder, or 2 simple plug with two
points firing in series viii often
help IN cases where such plugs can
he installed without serious change
IN the motor car or the Ignition sys-
The old system should be cleaned
lut thorouEhly and refilled with
fresh oil whenever any trouble Is eZ-
7erienced with oil pumping Up past
.ie plstons. Otherwise the trouble
night be made worse BY the pres
suce OF dirt In the OIL which would
core the cylinders and pistons. or BY
ne cartinued use Of an improper
srade Of lubricant. Usually IL VIII
le found advisable 20 use a slightly
ieaVier grade Of oil than before, and
ometimes the oil pump pressure can
'e reduced slightly, also although
his is not always safe
When the car is oTernauled ne
isfous and rings should be Tapped
b carefully. and the cylinders re-
ored. Il badly scored or out OF
ouud- u De- also a good scheme 10
install slightly tapered rings, II pos
ihle, in the lower Slots 20 scrape
Eces8 oil hack towards the crank
aFe. Holes may be drilled through
he lower part OF the piston. also, 70
Low the oil 20 drain back into the
rank case, but this is usually q JOB
OF the service station It IS also
drisable 70 have the connecting rods
lirnment checked. as e bent rod VIII
Don cause the piston 20 wear tne
vlinder badly and thus bring back
he oil pumping trouble - From
lotor.