El Paso herald. (El Paso, Tex.) 1901-1931, 1913-10-05

Motoring Department, The Herald
Can you tell me why the main leaf OF
the upper quarter OF a three-quarter
elliptic rear spring should break on
three consecutive days2 1t breaks at
the curve just above the shackle- II
It is not heavy enough should thlhh
The other spring would also break, buI
the one on the other side has Deen IN
use since / have had the cam LleD-
erman.
1t is hardly possible that three de-
fective springs would fail IN your nahos
IN succession. The spring Shackle, IL
seems binds, and does not allow sui
1icient freedom Of action II the Snackle
binds the strain must be taken up else
where. The springs IN action elongate
more or less. and If the Shackle does
not perform its function considerable
strain would fall on the upper elliptic
a the curve. Would suggest that you
make sure that the snackIe ana sha lei-'
bolts have perfect freedom OF dclIOh
when installing the next spring
Motoring Department, The HeroId-
] am told that on a four-cylinder four
cycle engine there are two timing or
derS-that is. ]. ,, 4, and ], ), /, =
Is there any advantage OF one over the
Other2 II so, which is betterz-Ama-
teur-
In similarly designed motors one or
der of firing has no particular adVan-
tage over the other. The manifold de-
sign however, is determining FAC
inders using a T-shaped manifold the
J. >, 4. 2 order Of firing is considered
the more efficient The inlet valve
opens and closes with more or less lag
in order to properly fill the cylinder
with gases. Since the gases from the
carburetOr attain a momentum due 70
the piston suction il is evident that the
order of firing and the manifold design
should conform. Otherwise one or more
cylinders would be partially deprived
OF the proper volume of gases
Motoring Department, The Herald
Recently we had the engine OF our mo-
tor delivery wagon thoroughly over
hauled The carbon was removed,
valves ground, all the bearings fitted
and new parts put IN Mnen the motor
was started there was a knock which
had not been noticed before. Every tnlnS
has been done to try to locate TINS
knock, but il seems 1mpossl Die 10 as
pose OF it. The crank case mas beeil
taken off several times and all the
bearings and working parts carefully
examined. but the knock is stiH there.
1t seems to be in only one cylinder
Could you suggest anything which may
help US to locate this2-Brooks Uni
In this instance it is difficult to even
suggest a cause. However, one Of our
correspondents had similar trouble
recentlE and it was found TO De due 70
q cracked piston; that IS, the lower parl
of the piston was cracked W ME the
crack was only slight, the installation
of a new piston Temedied the trouble
Likewise, in another case, it was found
that in assembling the motor one o.
the connecting rods had been turned
around. causing the upper part of the
connecting rod to side slap the piston
at the wrist pin In this case II was
found that the connecting roo was
slfr-htIv out of true, and as il had been
turned around this caused the trouble
In disassembling motors considerable
care should be taken to mark care
fully an the parts. so that in assem-
bling. each part will go back into us
proper place and position, as originally