Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1917-11-18
S|MPL|F|EO LESSONS IN
PROPER CARE or AUTOS
Many Parts of Automobile Engine
Likely to Develop Noises I'm
less Care Is Taken.
LOCATION AND PREVENTION
Times-Dispatch Expert Explains
Sources of Different Kinds OF
Poundings and Knockings and
Tells How Best TO Eliminate Them.
Engine Noises.


The places Of an auto engine from
which noises come are innumcrablc. az
every moving part, and every non.
moving part through which the gases
either fresh or exhaust ipass. may de-
velop noise Of some kind. Some
noises need not be worrLcdlibout. while
there are others whicff"t ndi cate that
something is loose. Iacksi fabrication.
or Is doing harm In some way and
therefore require to he Immediately
located and corrected.
Engine noises might be divided into
the following kinds Kissing. dull
pounding. knocking. tapping or click
ing, grinding or growing, and squeak
ing.
The kissing will generally indicate
that either the exhaust manifold is
loose or cracked allowing the exhaust
gases to escape ut r Or j. OF the H.
lustration: that these gases arc cScap-
ing between valve stem and guido at
w; or that there is leakage of the e1-
ploded gases This leakage might be
at the spark plug, cit aer through the
plug itself az a 4. or past tho threads
and gasxet "A. Tightening or replac-
ing is the remedy. The leakage may be
Mt the compression cock. either past
the threads p ar through the valve at
BIB. The stem may also be broken at
B. Then again the leakage may be
past the threads and caskct of the
valve ca rs. as at e, past the valve. or
the piston rings. The latter leakage
may be due TO the rings having
lost their elasticity. to being broken.
worn scratched tscored) 10 having
the slots in line or to carbon getting
in tho grooves. As the air enters the
auxiliary wave of dc carburctor there
Will also be u hiss. but this is quickly
recognized, the same being true Of the
hiss due to a stcaminT radiator.
with the exception OF the hiss due
to the cNhaus; manifold. valve stem
and carbure,or. Il Kiss is generally
sign of loss Of ompr1ssion and there
fore loss Of power.
The dull, pounding noise is general
~ an Indication that the mixture is
too rich: that the spark Is too far
advanced; that there is overheating.
or that there is carbon in the cylinder
or on the piston head as AT H. or valve
head G. While the engine VIII not
give its hes, service If i, has any
ono OF these faults. it may be almost
ruined because Of the overhcatinE. Il,
would be well. therefore. to determine
the cause Of 81 dull pounding noise.
Il
cess OF elimination.
The knock is generally a sound
which should b. regarded az dan
ger signal, as 1t is generally a sign
that some part subject TO the full
force OF the explosion. is loose Fail
ure TO locate u may result in an e1-
pensive breakdown.
y knock may be due TO 4 worn or
broken wrisi-pin bushinG |: worn or
broken connecting-rod bearing j. loose
connecting rod cap, *: worn or broi;en
main bearing. l.. or loose main bearing
cap. ~ AlEo 10 a loose half-tme gear
or fy-wheel, TO play in the grooves
Of the discs OF = disc clutch. or to
loose cylinder blocks. OF course. there
can be innumerahlc ether ways. slch
as nuts or even tools being left In tho
engine When repairs are made. or using