Richmond times-dispatch. [volume] (Richmond, Va.) 1914-current, 1919-12-14
stMPL|F|ED LESSONS IN
CARE OF AUTOMOBILE.
expert Gives Interesting Study on
'arc of Engine and Locating
It's Troubles,
rs TO LOCATING "KNocKlNGs'
Unusual Noises May Indicate That
Something is Loose. lacks Lubri-
cation, or Is Doing Harm in Some
Way-tlucstioDs and Answers.
ny rREDEn1Ck q. GuEnnLlCu. VI. y.


w FREDERICK q. GUERRI.ICH. VI. u.
Ihc places of an auto engine from
men noises come arc lnnumcrab!c. as
yer? moving part. and every nounov-
inS part through which The gases.
Nclop u noise Of some Kind. some
noises need not be worried about. while
hero arc others which Indicate that
something is loose. lacks fabrication.
"r is doing harm in some way. ard
therefore, Tequrc TO lie constantly To-
Ensine noises nigh, be divided inio
in2 grinding or sro"iinS, and squeak
r"v 9ItsslnF yin senne;raiIy Inatgate
loost or cracked. allowing Ihc exhaust
gases 70 escape Al l. or + OF The Illus
traitor. that these gascs arc escaping
or th-t there Is leakage OF The cxplot.
~ Ststs This leakage might DC At
DluS itstlt as at \ Or pact the threads
and --askct A frightening or r,plac-
ne the rsmedy The ,lea&ag may
ne threads ~ Or through the vaiV" -
III. Inc stem may also b' broken ~
past the threads and gasEct OF .he
"aiHc caps ~ a g past the valve, or
.rhe nision rings The lattcr leakage
heir elasticity, 10 eng broken, worn
or scratched tscorcdD. 20 having the
-ticlS 20 inc or 20 cdTDoI . Jung N
Tho grooves AS thc air enters The
aux !iiar! valve Of inc c0rUurctcr there
VII! also DC hisg but this IS quickly
recognized. n: same being true OF the
h.ss due 10 steam radiator
siEu OF Loan OF LonprcsniOn.
WIN the exception Of tn. hss Que 20
ca.huret"r hiss is generally a sign
o! loss Of compression and therefore
lo:s O. power.
The dull pounding noise ls generally
an indication that The mixture. is 100
rich; That the spark is too .ar adj
vanced; That there is overhsatins. 0.
thai there IS carbon IN the cylinder or
or me P;st9n head AZ a; II, or valve
.acse faults !; may be almost ruined
nctAuFe, OF the oyerhea ting 1t would
Sauec OF a sIil pounding noise. which
can readily bc done BY process OF
elimination.
nc knock IS generally a sound which
should be REGARDED IS danger s!s-
nal. as X IL Stner3hy sign ,hai some
nsri suejec' 10 inc 'u!i force OF NE
may result !" An expensive break
broken wrlstp!n bushinG l. worn or
brohcn con meeting rod bearing, j; ioooe
connecting rod cal r. worn or broken
main beaSins, l.; OF loose main bearing
zap 81. Also to loose half-timc gear
o. nywhesl, 10 play in tho grooves OF
nc dies OF. DISC cinich. or 70 loose
re innumer4bc other WAYS, such as
nuts or even tools beirG let, IN the en-
! long, boil ed spar. plug when short
should be used thus ha Yins the plug
hit by inc valve head.
let Mechsnic Locate knocks.
Nhiie many stunts and devices arc
G nosh, is ' Tin ETF op@lon 0f ihs
mechanic do this as sound viii carry
rn-ouSh the natal OF an ene inc and
fc-ent SPOT man II actually does. aud
80 really dang -oE3 knock. may he
cons!dtrcd harmicsS y knock is
Ike t 'i ESnotG. he ISp Or ctek is
mart. but Inc pas, IS generally one
which is not under 30 -rcat load,
and VIII most often come from some
portioa OF the valve m.cnanism. PROB
ably 80 rcr cent OF the taps aro due
20 The valve adjusting nuts not being
properly set, 80 that there IL a space
between the vaive stem and nu;. A. T.:
INA, of the thickness OF a piece OF na-
Mia wrapping paper. The tap may
also be due TO the surfaces at l. being
w OF of he push rod against its guide
-olier q; 10 chippcd cam X; 20 worn
cam shaft bearings; 10 Worn halftime
gear key s; TO shaping chain L; to
ioo:-, or broken piston rings u; or to
piston and cylinder The piston slap
aill sive from q slight tapping sound
IS rule. i, is not dangerous, bu, it
Indicates looseness. and should there
rore DC looked 10.
always be certain amount OF hum
ming or GROWING noise. Thus IN ian an
drive gear; as at r. When i does
fgnD
as a gear, chain. fan, or pump blade
rgb6ing or to Parts st ha ~ been
ine and be rubbing. or too worn or
dry roller or ball6earings. Thus a
scags from ehan Eo rnob hs ins
It's housing: fan rubbing against
rada'gr Or epEine PUMP blade rubbing
lack Of lnbrication is liable 70 Be- the
be found as quickly as possible.
With the exception Of a slipping fan
belt 50 sane%s Is an ndiIa,i9n That
cation. While, il may como from any
Of the parts for which lubr,i,cating
10 some part, because of wear or its
being bent, coming in contact with
another part which it is not supposed
posshIe. and referring to the illus
ration. We h"d H iissssiiS;e
may come from a, IA. 3, BIB. c. d.
T.. +. G. the carburetor. or a stcaming
radiator.
DULL POUNDING
from n carbon; too rich MIXTURE; over
KNOCKING
from /, j, Is. L.. NJ. y, S. loose. fly
wheel, loose timing gears. clutch or
improper parts. as too long spark
plug.
TAPPING
from o. r., G. 7. S. w. U. n, d.
GROWING;