Show HOT 1 ENGINES COST OWNERS MUCH MONEY Advanced Spark park Often Cause Caus I for Racing Engines and andrIot rIot Hot Radiators We Wo are arc now approaching the sensor season I II of t tho year car when hon overheating of ot th fhe e I engine Is a 0 trouble frequently en on encountered en countered and In some pome Instances becomes becomes becomes be be- comes almost a l chronic condition This I Is not to sa say that overheating overheating- Is a n at seasonal ill of ot tho the en engine lne because It t often occurs In zero temperatures However It Il is more frequent In summer sum sum- mgr mer and consequently the tho car owner should all nIl duo pue precautions to prevent prevent pre pro vent It Ser Very Now In tho the first first- place It Should bould ba bo understood that overheating overheating- Is s no mere mero annoyance It Is more moro serious than that If It tho the condition becomes chronic it contributes to tho the rapid de deterioration deterioration de- de of or tho the engine om end and its equipment and it should bo remedied as quickly as ns possible A number of or conditions ma may produce pro pro- duco duce overheating some somo functional and somo some mechanical Perhaps tho the comman commonest commonest com com- man monest st cause of ot all aU Is driving with tho the spark plug pluS lever too far advanced When Whon this is d done ne the spark occurs whilo tho the piston Is a considerable Istance Is- Is tanco tance down In tho cylinder leaving a more than man normally large largo area 01 Ot of the ino I I cylinder I wall exposed to the tho flame lame I whereby an Increased amount of or heat l is carried Into tho the cooling water which bolls Adjust Spark Tho The car owner frequently notices that when ho Is obliged to climb a n steep hill with tho spark retarded 1 to keep tho the engine from knocking by the time he gets to the top his radiator Is steaming If It this Is Js characteristic of ot otI I any given engine tho the owner of ot that outfit had better get et at tho the fundamental I tal cause caURe of ot it and cure it It so 60 that the tho spark lover ma may bo be kept further advanced advanced ad ad- on hills In tho the race raco to determine tho the most prolific cause of ot overheating our old friend carbon la Is well wen In the van an If It not the actual loader lender Carbon deposits I cause causo with just tho the sax sanio effect as If It tho the spark lever had been I too far advanced Tho The pecks of ot carbon car car- bon hon become Incandescent t and fire the tho Incoming char charge c before Its proper time You see In this case also the flame occurs when an undue area of ot cylinder wall Is exposed so that an nn excessive sl e amount of ot heat finds its way through Into tho the water The 8 symptoms of ot this cause caUlO of ot overheating are knocking backfiring and a n falling off ort offIn offin ortIn In power Tho The only cure of or course Is removal of ot tho the carbon deposits which may be done by hy scraping or by the oxygen oxy oxy- oX oxygen gen een method The r Naturally enough a 0 second common cause causo of overheating Is Ie to bo be found in some somo failure of or tho the cooling s system stem This trouble Is easily discovered simply elm elm- ply by removing tho the radiator cap while tho the engine Is running and noting whether or not there thoro Is a n circulation of or the water If It the tho water Is not running running running run run- ning obviously the 8 system stem Is clog clogged ed up and the next thing Is to find the cause Now tho the causes behind Impeded circulation ar vary according to whether I tho the 6 system stem Is 13 thermo s phon or pump In tho the thermo thermo-shoon cooling system the tho only onh thins thing that can cnn stop the flow Clow of ot water Is a direct stoppage In n tho the tem tom The first thing to do Is to open tho drain and permit the water to run out of ot the radiator and engine By Dy watching tho rate of ot flow it Is easy to determine whether the stoppage Is inthis In Inthis Inthis this part art of ot the water system If It tho the radiator Is stopped up It t should havea haea have ha a thorough cleaning As a n general rul rule this Job should bo be handed over to a n firm that specializes In n this sort of or work worle When hen It is mentioned that sometimes sometimes some some- times hs its much as four pounds of ot muck will bo ho taken out of ot a single radiator r tho the roa reason on why special treatment Is necessary Is shown Use Good Lot It bo be emphasized that tho average aver er age car owner Is far tar too casual Inthe in inthe j the tho sort o of water ho he uses In his cooling system If Ie dirty water Is used in this connection u a little foreign matter en entering entering on- on at nt each ench filling soon Boon creates the tho material for tor a complete stoppage On the other hand with tho the pump system there thero Is not much dnn danger cr of ot overheating due clue to stoppage of or tho the system system tem because tho the positive action of ot tho tho rho pump forces the water around and prevents pro pro- vents tho the t tying up of ot tho the system In n this wa way But nut Yh when n anything goes wrong with the tho pump tho the R system at once ceases to circulate tho the water which Immediately bolls boils with the tho usual con con- sequences D By opening tho drain of ot the tho pump S system tem the tho rate rata at nt which the water pours out will give an accurate lino Uno on tho tiro wa way In fn which tho the device is fix functioning Many Mani engines In use today Include a a. called so-called thermostat tho the function of ot which Is to l keep cop the tho temperature of ot tho the at tho the favorable operating point If Jr anything happens to the thermostat to so that It falls fails to open at the tiro appointed appoint appoint- ed od time circulation In the water r system system system tem stops and overheating Is instantaneous Other Oilier Causes Cannes So much for tho the functional causes of ot overheating overheating- Thero There aro are other causes of this trouble principally mechanical and I Ignition timing must bo tin considered con- con ored In this connection Faulty car car- will overheat the ent engine e Poor mixture which burns burnt slowly In Instead instead In- In stead of ot exploding with snap and vim will do tho the tame saino thing The Tho effect of ot ofa ota a bad mixture is the same samo as running with an on unduly retarded spark The slow burping burring mixture Is still burning after tho the piston starts on Its wa way down loa ln leaving an m abnormal area aroa of ot the tho cylinder e cylinder der wall exposed so o that the excess heat finds s its way woy Into tho the water S 8 tem tom Tho The tendency of the orn a average o oar cat owner to use uso too rich a mixture tends to Increase this trouble Valve and anci Ignition liming lIln do not produce emor emergency oncy overheating These Thesa Incorrect adjustments arc aro more likely to produce the tho long standing standing- chroma casos of ot overheating and they usually call for Cor a n. visit to tho the service station The Tho Tho average O owner I Is ly not up to reme rome remedying dying thorn thern Lubrication Is another possible cause causo of or overheating If It It Is not properly carried out out- The Tho moving parts aro are deprived of ot the tho protective film of or oil off friction Is generated and this moans excessive Jho heat Lot Tot us WI tin finish Ish b by warning tho the en cat o owner lIer not to permit overheating o to continue As wo 0 said In tho the bo beginning It Is destructive to the engine n- n j warned in time lime run down the tho fundamental fundamental funda mental cause caulo and cure It j |