AERIL 26 1919

7' ` “_ W - Y Y _ & PA(-E v 1'Y

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Bureau, Review oi Reviews

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H. (M. Y. writes: My F0;-q puns the hills well enough and l have lit- _ tie fault to find with it when run. nlng‘slo_'wlv. but when I try to get it above _Ii ,certain speed, it misses. spin. larsl flfld _Will Dot go any fasten 'Wlherois the trouble most likely tg be found '

Answer; The following are a .few of the possible causes: The timcr . muy bc so worn that, while the roller makes r_cli;ibl,, connec_tion with the contuotii segments at low speed, its

track ir. so uneven that. at high am giV|HE my car a general over. speed. it-_ tends to jump and no hmgel. hauling und' am' told that this should makes .irifnllible contact with the noifbelleglectcd. '

seglncutis. Some ol' the valves may

be inclined to stick in their guides, of “leallilix the muffler is to take it

9“ll\`0|y apart und scrape the gm-_

owing to roughness or warping of their stems and they may fail in

seat llififime when the speed exceeds 3"" '.0 <10 '-his because all the joints a certalxpvalue. Weakness of some bewllle ‘burned and rusted tight.

S0me scale and soot can usually be

of tli9y`al_vf:-springs may aggravate this -ll8li‘iWi0i_f-'-;~.-fit is also barely pos- '

sible' tilllt tli§,"'ga‘s'oiine iinc is some ""0" Visorously with n. immmei-_

“’|‘llc U1? 'JIIBIIIB ls run with consitl~

enougii fuel can be S“pp||0d m kwp crable throttle and very into sparlf the nilxturc up to normal strength, 50 Hs 'lo blow out the material that when the engine is drawing charges l’9°°"\eS |00S€ll€d. lt used to be it

,lcominon practice to remove u 1nuil`le.r und place it upon a ilre, built out of

wllut‘_-vbhdtrnctedland not quite

fast. You better inspect the timer, test tlieyuivcs und t-heir springs and see lhtttf the gasoline pipe is clear. ‘

TESTING SH_0E FOR WEAK SPOTS

W. W. G. ask': I-low can I tell

whether an old casing ling- yet de- veloped any special points of weak~ _n_ess.` .Il1don`t want to put any casing in service. if it is likely to blow right. Dui.. ` -' `

Answer: By feeling it over with

the linmds. you can detect any 'bad tahric 'break that will soon lead to a

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HlntS fOr the Motorist BY Albert L Clough

' then to lmnimer it ull over pm]

;1'<;1:l§ ihillotoutiiind bending the wap readily detes'tw ll the hands' unclean me or mor; “HY Ulllli lllace, whore “ally broken canvas piles have uct-

or are far on the the way

lo failure. lf you carry' this exam.

2;:;;f;I; ull ground the`inside circum. fabric W5' 2"’ “Wing and find the

_ -'» '"1 "ml spring. at an

ponltsv "-1 is Dl'0\l8l)l0 tllBf'(i_ lg I0 weak Sllot yet developed. ` ‘

CLEANING MUFFLER

°- W- B- ==k'= what is me best

WY of cleaning out the muffler? I

A"'W°"`: The Will’ effective wav

face. but soiiietlmus it is dim.

"$100880 Ui' turning the muffler all

100114. until it became red hot und

empty out the scale. but this method is not to bg recommended. We doubt lf your muffler requiresattcntion un~ less it is pretty old and has been used with an engine givinga very oily or sooty exhaust. i

HOW CYLINDERS WEAR OUT

, Cylinders and pistons made of the

blowout.__ By turning the casing.

best metal and originally well fitted,

when the car which carries them

may be expected to good cylinders

ition. The motor car engine piston :cts not only to receive and transmit gaseous pressure but also to guide the motion of the connecting rod. thc piston itself functioning us u cross- head and tiff, cylinder walls as a guide ind thus all the bearing pressure im posed upon 'these parts cause friction and wear ou their opposing surfaces

All these forces uct on ond plan.

na.n1`ely in that at right angles to th.'

cylinder wear is almost cntirely in the llane of connecting rod motion unr 'Jvootlcally absent in the plnne per pemllcular thereto. When new. tin- cross. sections oi' tin, cylinder bori and the piston are perfect circles, but '~ ‘ir wcnr being all in one plane. both »-utr' went' elliptical. the cylinder bore ‘li.tli\'»i<~'r ill the cosisectlng rod plant becoming elongstt-tl and thc piston diameter in this plane bt-coining shortened, so that iin:iil_\' the t‘_\'lliitlr~r ll' rc und piston cro:=.g sections l»i~t'o|r\<

diameters nt right angles.

The illutzctllm-y is. in voti|'sc, i' -~

luii\‘cl_v slight, hut sufficient ifr lm" two ci'esr-clit slrupetl .\‘|lnt_-cs' in o;ipt».<lte silica of the piston \'»'h"‘ finstlly cannot be put-heel. tliisltiuiiiv ni~_<_.; being; the it.-isviltiitl t-_untlition "fir sn~<-i~ssi`til operation.-1, \\'Iio_n iiln-t'o|n-_~,|., i|||`pt»~‘.~'lllle ii; |lnt".f the pision~ti2l|ll_V

wear with extreme slowness if only

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__ A Maxwell Grows Better - _ the More You Drive lt ,

HAT is the test of anything good. The norc _

you use a good watch the better it wins. The .

i older your-friends grow thcbcttcr you like them.

And nothing is more pat on a Maxwell than this.

Hardly a day goes by that some Maxwell owrzr _ _

' doesn’t take his pen in hand and write th: t he is new tg.. passing a mark of 30,000 miles or 20,000. or ;'=".f_':"')0.

f' , .To purchase such a man’s Maxwell from him . would be like trying to buy an heirloom i`~<; '

But thcsc~Maxwells of today arc far ‘_ " cars ___

than those of yesterday.

For it is the policy of the Maxwell Motor C' ‘ npany

.f to keep on building _and building on the '_-riginal .1

sct down .5 years ago.

300,000 Maxwclls have been built on tl: ` y rogram. f

1000 refinements have, been made since thc fini -is _

Each new Maxwell is better than yestcrday’s. ' s

‘ For doing one thing alwayslrcsultsiin doing it

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` This 'Maxwell you scc today is so 1 vastly improved in appearance that

f` - you may think it a new model.

But it isn’t. _lust a better looking

r Maxwell. And a better car. gxwarxqfx ._

'- 'rua maxwast-moron co. or camps, Linnea, wnmson, ont.

GAUIIET & GRANT Charlottetown, P.E.|

Distrlbutlursfor P. E. Island.

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discarded. because its style has be- come obsolete or because of mechanl~ ‘cal defects external to the engine Miloageg well wp in the ten thousands

iiwliys assuming conscientious lubric-

crank shaft with the result that plstom

thv~,l_- of two olllpscs with tht-ir longer

in its hurt-_ tho ports arc no'l0n:er usttlill-..Moreo\'e\-_ the olliplc-lt_\: or

ovalizatlon. prevents the perfect func-» tloning of piston und cylinder as cross- hcnd and guide and the piston. as it UIOVBB UD Bild down, vlberutlon from 011° Side of the bore to the other ol “cocks up" so as to illl the waste EDU120. D!'0|-l'1C|\lE ills noise colnmonl_. knows us “piston slap." Piston tight. ness is entirely dependent upon the histon packing rings and the oil which collects around them and, ug tliosc rings are circular in form, with is tendency io expand against the <~yliu<l<>r w.\li, it is not to be oxpertet that they can park n bore which' is

ovullzed to any marked oxtant.l_

CYUNQER PUMPS OIL

H. W. C. asks: Will drilling one

eighth inch bolcs in the bottom ofla Ford piston stop the oil working past it anri. if so. where is the best place for them? The cylinder is not scored and I huvevtrled un oversize. piston and rings.

Answer: We doubt it_ When this

expedient is tried. however, the pro~ cedure is usually ns follows: itc- move the lowest ring cut a bevel an its upper outer edge, drill several small holes through the ring, start ing the drill in the beveled surface find also drili through the piston sev- eral tllnos. starting the drill in tho ring grooves. The bevel is supposed lo catch oil scraped from the cyi\n~ tier walls. which is returned to the crank-case through the holes. If it is the front cylinder that gives trou- bln, you might try drilling a small hole in the oil supply pipe. B0 that -.mrt of the oil will' -be delivered to

_Ile second crank-case oompartment. in case this engine is rather an old me, we fear that the troublesome cylinder has worn somewhat oval, so that rings cannot make it tight, in which case boring out the block and fitting new pistons is the only thing likely to give you permanent relief.

DEALING WITH THE

WORN CYLINDER

Circular Rings Cannot Pack Elliptical Cylinders

The first sign oi' wear between it

cylinder and its piston is lack oi tight- ness between them, which results in rho escape ct the gases. when the com- pression stroke is being pcri'ormed. '.\'i\en this leakage cannot be nttrlbut- cd to imperfect seating of the valves. faulty piston fit is indicated. install- ing new rings is the natural resourse

was in case the old rings have 50 torn that their ends do not nearly ncct, if they have become loose lu their grooves or have lost their sllrihg or have broken. but it will not give satisfactory results if piston und qvlinder wear have progressed so fur ug to have resulted in consirlcrable ovalization. Ii' the piston, when rc- muvedt, docs not show large areas where it fails to follow the borc tus indicated by blackened portions) und. when cleaned of oil. cannot be wabhl- ed in its born by force applied tn the tfonnoctlnlg rod, while, at the sonic time, the rings ure loose. weak in

spring and blackened over parts of\ their faces, it may be hoped that new rings of good construction and' of ‘_~'llgh»tly larger size may improve, com- precsion.

if they fail to do so, the next step is

to install pistons that uré as much oversize as can bc used without caus- ing ‘binding when they become hot. ,The new pistons are . ofcourse. truly circular in section and their use re- duces thc total ovalizlng <-l'l'\»ct -- rings of ,the ful] allowable oversize ,being used with them. i~t should ' have been remarked

tllatiunlotis the cylinder bore possessesi a mirror like polish and is free from. scratches or scores, the above mon- _l tioned expedlents 'are oi' little value. il Finally, in the history of a cylinder s. time may come when oversize pistons, and rings do not restore compression' or prevent excess oil from reaching the combustion space. ‘l ` The.-‘piston then usually shows large blackened areas and noticable bright.| worn areas one toward the top 'and one

toward the bottom on opposite sides' in tho connecting rod plane. lt can

-ind it may rcstore the original light- -

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é _ ' Chalmers

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_ HE great engineers of tlvc autonn»l\ilc in<lu_;try

arc discussing ii0\rut‘lays thc lon' grtttlc gas situa- tion more oftcn than thc numhcr ol cylinders a

_| Car should havc. _ `

» Not long ago one of tht-in said that .'\uto|m»l»ilc engines would have to hc l'cflcsig_»ncti to use thc illlcrior gas of today. ~

- This the (flialmcrs engineers tlicl wlicn they built

into thc great (`l\u||ncrs r_-n_f_'ine thc muy lzinifuls llot Spot and Ram`s-horn manifold.

These two devic‘c_<. com-'<:rt_ low gratlc gas into high

` power. V

l"or any engineer will t;cll you thcrc are more

_I thermal units or p<'»\\'cr in a gallon of low grade kero-

_I scne gas t.l1an_l.lici'c is -in a high test gas.

,L The llot Spot puts the gas in sliapc for power re- ` sulis. lt breaks up into tiny \ spur molecules the gas-

l 3|S S0 hne that it_rcz1lly becomes “ dry."

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‘il the quickest route cvcr clc\'i.~4ctl and when the explosions il comc ilicrc is so liitlc vowcr to csca uc tllrou 'li thc cr

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haust as to hc Well nigh ncgllgllvlc.

5 'filers will tell you the story lar more _ M ‘_ §' eloquently than the liliglislilaiignagc can 23 C

express tt. ll _ CHALMERS Moron c:o_or CANADA, inmates Qualify Fifa

. WINDSOR, ONT.

“Ganeri

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l_)i.~lirillutul's for I'. E. island.

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usually be wafbhled in its bore. when,

all oil is cleaned oil' 'Measurements| taken by micrometer calipers will then! show that the bore diameter in tho; connecting rod movement plane is,

decidedly greater than in that at right' angels thereto and piston slap mul’ have ‘become noticeable. Wheul moasnuremcnts show more than 0.003 or 0.004 inch difference in the bore; diameter, ir is generally considered that ilrst<:I:\ss results as to tightness cannot 'be obtained without havin! the cylinder (and its mates) rebored. which is the only means of restoring n. truly circular cross section and in-

. 0 I l _ suring operntivg tightness.

________...._._-..-.~_-______._..*_____________ _

____ _ _-..___ _ `\1insr¢'s Liniment Cures Golds, Ete-

Gray Dort is a different

light car. Different in the im-

portant things-in the _power and quietness of its motor, in the size and comfort of its body, in its economy. Different in all the impor- tant little things too-in its equip- ment, beauty of line and finish, freedom from trouble, ease of hand- ling. Yet the price is less than that of most light ,cars-and little more

than those that offer so much less.

The touring car is $1245; the Gray Dort Special-the car with added refinements and extra equipment, is 135 extra; there are also a coupe, and a sedan. All prices f.o.b. Chatham and are subject to change without notice. ;_

4...

GRAY DORT MOTORS, Limited, Chatham, Ont. ,' ,

ln the U.S.-Dort Motor Cnr Co., Flint. Mich. `

_ GRAY

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