THE HONGKONG TELEGRAPH,
LOOSE. PISTON TROUBLE.
An Elusive and Costly Problem.
BY ISRAEL KLEIN.
One of the most elusive and costly knocks in the engine is that caused by loose pistons.
It is what is called a piston slap, but is heard almost as a knock, especially while the engine is still cold. As the engine warms up, the knock disappes re.
However, oven after its disap pearance, its effects are felt in Lower power and loss mileage from the fuel."
What happens is this:
A loose piston generally means too much clearance between cylinder wall and piston. Tho re; the fuel that sult is that part should burn up completely in the chamber above the piston hoad, Keops down through the space and into the crankcase.
2
MOTORING SUPPLEMENT.
CAR IMPROVEMENT of the car is utilized to oporato a
PLEBISCITE.
A Remarkable' Coincidence.
as
oil which distributos pump through pipes to every point of the chassis. Equally remarkable is the fact that in the same issue a braking system is described In the "Motor" appears the which goes a long way to meeting result of the voting on the twentythe requirements in the improve-
we describe car improvements put forward mont which
"Trouble-free brakes,' ·which ́ for the considoration of renders,
The improvement which by the comes sixth on the list, while Easy gear changing," which in popular vote heads the list is
Much easier lubrication." Com-third, ie covered to a great extent This may be repeated with the menting upon the result our in the further illustrated article other cylinders,
contemporary remarks: In our on the now couslant-mosh gear list of improvements we wrote: systém which is being export- The remedy for this trouble is It is suggested that there should mented with by a loading raboring of the cylinder, if it hapba a centrally placed oil reservoir concern, pons to be over-scored or out of of ample capacity supplying all round, and fitting of oversize pis- paris nooding lubrication through tone and rings.
a series of pipns." By a remark able oincidence in this issue, which contains the result of the. voting almost exactly such a system as that referred to is described and illustrated. This is a method of automatic chassis lubrication in which the vibration
If the piston slap is caught at its first stage, the same piston may be used, except that it be lapped in" or "worn in," so as to polish down the cylinder wall to smoothness, and now piston rings be applied.
+
At times, the connecting reds may be out of aligument, causing the pistons to strike the cylinder walls uperonly.
If clearance is correct, and the There it cylinder walls look amooth, the dilutes the oil, diminishing its connecting code should be check- lubricating officiency and played up for alignment. That re- ing havoc with the cylinder walls quiros operation by a high crade and bearings.
At tho samo time, the oil from the crankcase is pumped up
mechanic.
through the space between piston A WALKING STRIKE. and cylinder wall" and into the combustion chamber. There the hoat of combustion burns it enough to cause a heavy layer of carbon to result.
A curious story of a threatened strike comes from Jorusaleın,! The diluted oil scores the cylin-whore a section of the bicycling ders. And the widening spaco community recently becams in- offers room for the flames of com-dignant bocause their licences bustion to get in and further in- were not issued to them in the
language which they favour." jure the cylinder wells.
The walls get out of round, un- dor this scoring and burning pro. cess, and compression is greatly diminished.
They accordingly demanded Itheir "rights" from the authorit ties, throatoning, that if their re- quest was refused they would adandon the use of bicycles alto- This is, perhaps, the You may become suspicious of gather. piston slap when the engine most perfect example of the strikor culting off his nose to spite knocks only when cold, when it loses compression, and fuel is he-his face which has yet occurred, ing wasted in less mileage.
although we have plenty of in-
While the engine is hot. how-stances in which strikes have, in ever, you need less compression fact, ended in that lamentable and your fuel complastion is alteration. Ex.
most complete.
Put the two and two together,
Liten make certain by the follow ROAD TO LOS ANGELES.
ing test;
Remove the spark plug from the
Another link in the stretch of
first cylinder, pour in abent Bu eighth of a pint of heavy oil, then states highway along the Pacific crank the engine by hand slowly coast has been completed between Oxnard and San Guan Capistrano. until the oil works in.
Replace the spark plug and This gives motorisis another! start, the engine. If the sathe smooth route from Long Beach knock occurs, it isn't a piston into Los Angeles. knock, at least in that cylinder.
If it doesn't occur for a short
while and then begins after a fow Death from influenza is announc- revolutions of the engine, you led of Prince Franz Za Putis, oa may be sure the trouble is in that the Prussian Baltic isle of Rue- cylinder, and the piston is the gen. The prince was 79.
cause.
leaves no heir.
He
||
Prest O-lite
HOUR
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NNNARSAGE
VOLTS
8888
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TYPE
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The following is the order of merit as decided by the votes of readers:-
First: Much Easior Lubrica-
tion (1). Second: Easy Starting (6). Third: Less Frequent Gear
Changing (2). Fourth: Skid-proof Cars (10). Fifth: Reduced Potrol Con-
Ford
SATURDAY,
sumption (13) Sixth: Trouble-froo Brakes (8
".
MARCH 19, 1927.
UNDER-INFLATION. Cause of Fast Tread
Wear.
Because a balloon tyre" is ono of the most flexible and becauso" it requires loss air than the bigh- Sovonth: Floxible Glass (5). Eighth: All-round Improve-
pressure tyre is no reason for Four pounds difference from neglecting it entirely. With the' ment in Lighting (11) Ninth: New Style of Body- the normal recommended pres- minimum of air pressure so low
work 3)..
sure makosa lot of difference in in balloons, there is all the more Tonth: Moro Powerful Electri- tyre life, especially in balloon reason for being sure that the
cal Equipment (17).
tyres, because they defloot or pressure is not allowed to drop Eleventh; Automatically Ad-flatton out under their load more within the three-pound limit. But
justable Suspension (9).
than high pressure tyres do, even fast tread wour is not the only Twelfth Really Adjustable when they are properly inflated. evil of under-inflation. Fabric Seating and Controls (7). When balloon tyres are under- breaks or stone bruises are bound Thirteenth: Easior Type Main-inflated this wiping action of to be very prevalent in under-
tenance (16).
inflated tyres. So that when the Fourteenth: Untarnishablo
pressure is too low in the tyre Bright Parts (12)...
the percentage of deflection in- Fifteenth: Automatic or Seim-
creasa and the volume of air automatic Jacking System
within the tyre is not sufficient
(18).
to prevent the tyre from being flattened out when it receives a sovero shock such as striking a curb, or a looso pavement brick" or a tram track. Then the cord. be chooked and inflated just as caroase is. crushed between the regularly as the water in the rim and the obstacle, and a fabric radiator is checked and replonish-break will be found some tinfa
lator on Goodyear News. |od.
the tread against the road as the tyre makes and breaks contact with the road surfaco is more pronounced; the result is loss of traud miles. Once a week is not too often for balloon tyre users Sixteenth: Lighter Cars (19). to chook thoir indations to be Bevonteonth: An Automatic sure that they do not drop mere
Sprug (4).
than three pounds from recom- Eighteenth: Improved Mud-mended pressures. Tyres should
guarding (15). Nineteenth: Bumpers (20). Twentieth: Better Heating and
Ventilation Systems (14).
کر کو
[UFPR 1500 LUS }
KWAN SUN YUEN & CO. LTD.
40
i
(0255 200 16
DO YOU KNOW THAT.
According to the latest official figures published more than 75% of the light trucks in Shanghai
cio Fords. In a market where practically every known make of truck is offered. for sale. Shanghai' buyon conclusively show their preference for the Ford truck.
WHY?
The fact that these trucks have been extensively bought by Chinese and foreigners of all national. itics shows that they recognize that in buying Ford Trucks they are buying reliable transportation at the lowest possible cost. The truck buyers of Shanghai are exceptionally keen business men and the low initial cort, dual-ignition, economical upkeep, low depreciation, high second-hand value, case of driving, power supplied by the worm drive transmission etc., are factors that cause them to invest in Fords.
BUY GENUINE FORD PARTS DO NOT USE IMITATIONS
The Ford Truck Chassis
Delivered in. Kowloon
H.K. $ 990.00
Bodies Built to order at Reasonable Cost
GROUP
No.
Prest Olite
1 Studnhalcor Light & Std Sixon, Roamor, Naah, Gardner, fe,
2 Studebaker Big & Spec, Sixes, Ren, Pierce-Arrow, Packard 6,Chrysler &c
3 Case, Cole, Cunningham, Franklin, GALT, Oldsmobile, &c.
4 Auburn 4, Buick Std, Chevrolet Cleveland, Essex, Fard, Overland, &c.
5 Auburn 6, Buick M, Chandler, Hudson, Jorden 8, Oakland, Tem, &,
Gapaaobilo, Marmon. Packard 8. Paige, B& V-Knight, Willys Knight c
7 Dodge, Cardier 8, Orahata Bron Truck, Franklin 22, &c.
12 Lacorabile, Mank Truck, Stearns, Rolls & White
Cad Social Cadillac Baltary
...
Cye Motor Cydo Buttery-Harley Davidson, Inulian, Henderson, &c.
M/C MORRIS replacement Battery.
Prest Olite
HONGKONG HOTEL GARAGE
(THE HONGKONG & SHANGHAI HOTELS, LTD) · 25, Queen's Road Central
Tel. Central 4759.
ANDREW HARPER
Authorized Ford Dealers
Chatham Road, Hunghom, Kowloon: 6 Queen's Road, Central
HONGKONG
Talophones: C4895 and K1216
Alex, Rosa & Co., (China) Ltd. Sub-dealer
Bank & China Building, Hongkong
Ford Motor Company
Detroit, U.S. A.