The Washington herald., 1921-12-11
CAGES, NOT CARS, FOR CANARY
BIRDS, ADVISES AUTHORITY
Little Squeaks and Noises Are Not Hard To
Find If Motorists Look.

ore bearing is taken up without
reference TO the others In unit
power plant designs. when tho
shaft is thrown ont Of alignment.
one Of the shafts in the transmits
sion is sure to bind and noisy op-
GRAFTON is inevitable.
Another source Of hearing knocks
is found in the fanEes OF the
crank shaft hearings which are
nattened by crank shaft thrust. In
this case ii does not pay to try
and fix the old bearing flanEcs: l.,
is better simply to get 4 new hear
ing.
In Rod Bearings.
PLAY often develops in the upper
rod bearing and often enough tho
( 'ar owner blames the lower rod o.
rsnkshaft bearing. on many ~
the cheaper cars there is no he7--
/ :tr a. the top Of the rod. wh5ia s.
| certain others a bronze bushiuE j.
| Installed to take up the wear WreH
there is no bushin- new piston
pin will have to be fitted. or if the
piston bosses are worn eccentric
/ II may mean a new piston or the H.
/ stal1ation Of a bushinC.
When the pistons or cylinders are
worn the result Is knock that
sounds much like the ore that
comes from preiEnition. If this
trouble is not In an advanced stag
It may he cured by fitting new
rings. On the other hanl " sevcr
case may require the installati II
Of complete new set Of pistonS.
when the cylinders have worn
slightly oval the remedy is e 70
bore them in a larger size. fittIn-
new pistons. This gives practical
| ly a new cylinder block
Timing gear noises are fairly
common. in which lass must o,
| included chain noises. some siIcu'
chains have adjustments for talk
ing up slack dua TO wear. while
others must I've shortened by talk
ing out link. In the case -
chronic chain rose. tn" owner will
do well to consult rvice station.
One Of the commonest knock OF
all is that due to rreiEnition. This
may be caused by cirbon deposits
| in the engine or by too Er at an
advance Of tho spark. Poor timing
will also cause the overload. Will"
overheating. overlooking the engine
and incorrect mixture are alternate
causes. The result is always the
| same The fuel charge AxplCdes
| too soon. not giving the piston time
| to reach top dead center and the
result is n thrust against the side
/ of the cylinder wall. In curin"
preiGnitiOn knocks one has to pro-
coed by process of elimination. be
ginning with carbon. which is the
commonest cause.
! Transmission noises are not at
! all uncommon and generally result
/ from one Of the shafts being out Of
| line by reason of a worn bearing
or binding gear. Sometimes the
| entire transmission is out of line.
| so that both shafts are out of true
Very often a gear may be broken
because the shaft has been out OF
! liffc. The car owner has new
/ one installed, but this does not help
| for long. because the entire unit Is
| out of alignment.
! Propeller shaft and universal
| joints are not usually troublesome
through noisy operation, but the
rear axle frequently is. wnen rne
driving pinion and difYerential mas
ter gear are not running true. there
will be loud hum. with an accent
or stress once in revolution Most
units have some means Of adjust
ing to take up wear In this loca-
ton, the adjustment consisting OF
moving the entire dInerentiai. unit.
which is job for expert hands.