Show QUERIES ANSWERED By George H. H Robertson Dont Don't expect your lubricating oil to perform the Impossible task of ot correcting correct correct- ing mg mechanical defects Too much clearance between the piston and cylinder cylinder cylinder cyl cyl- inder or or bad and leaky piston rings will surely fill the explosion chamber with carbon even when the best lubricating lubricating lubricating cating oil Is used Dont Don't fill till the pump or reservoir of motor above its correct lever and expect the motor not to smoke and not to carbonize the ders is sufficient too sufficient too much is useless waste and the cause of ot trou trou- ble Dont Don't buy bulk oil from garages I you pass on your trips Your request give me a can of oil may rob your outing of ot its pleasure Take a supply of oil you know to be good along with you OU Dont Don't fill your our motor by pouring oil into it t through a dirty or sandy funnel tunnel Sand and dirt do not lubricate lubricate lubricate cate but the they do destroy Dont Don't use Don't use too light an oil under the impression that an oil must be ver very light in order to reach all parts The temperature your motor is so high that too light lightn an n oil will be so thinned tl as to be of ot little use as a lubricant For efficiency efficiency effi effi- and economy use the tho heaviest oil permissible with your lubricating system Even heavy oils run freely when exposed to the heat within the crank case Dont Don't forget that an air ir cooled motor requires heavier oil than thana a water cooled motor because of ot its higher temperature Dont Don't think that oil never wears out When you OU drain the old oil from the crank case always rinse it out thoroughly with kerosene kerosen before filling in the fresh oil Be surto sure sur to close all drain co cocks ks A more responsive re responsive re- re motor will be your reward I Editor I have an old two cylinder 1905 type horsepower but in goot good I condition This is a low speed engine engin there being scarcely an any difference i ithe in inthe inthe the speed whether running free or propelling propelling pro pro- pelting car Is there any way to make mak this engine into a high speed one one or at least faster than at present It can d do about eighteen or twenty miles at best bes best Exhaust pipe is about 1 Inches steel stee I haven't a very very good opinion of th the although it is not hard t to start and thought to install ll an ai air mixing valve in Intake manifold AlsI Also Als I am using batteries and colI coil col coil I should like to be able to make aroun around thirty J J. J T T. T JOHNSON From my y experiences experiences with wit the type of car you have would sa say that there is no way that you ca can increase the speed without sp spending a lot of ot money for engine en e changes magneto etc Would advise using it as it is is Editor I I have a Cadillac car four cylinder and am constantly having trouble with wit same The power is very low on first firs and nd second speed and hardly an any I whatever on third speed I had th the magneto magn magnetized have also cleaned out ut muffler and had carbon removed tr from m top of cylinder but still trouble remains I had adjusted a number of times but still no result resul Can you suggest anything WILLIAM JAMES Would suggest that the timing o othe of the motor be gone over thoroughly I Ithe It If the valves or ignition are not set properly properly properly prop prop- erly the motor will beb lacking It in power If the car drags arid and does no not coast properly the motor will not pull pul efficiently I Editor How will defective mixture cause caus heat and how is adjusted I to overcome this condition P P. M. M JONES I A mixture that contains too muc much gasoline vapor will be slow burning and will have morer heating value without producing correspondingly more power than one of proper proportions proportions proportions pro pro- portions or having an excess of airAs air As combustion Is not perfect the engine en- en engine engine en en- gine will not deliver Its full power and the surplus heat liberated by every explosion must be absorbed by bythe bythe bythe the cooling system The adjustment varies with the type of instrument in instrument instrument in- in strument used but as a general rule the overheating may may be reduced by either closing down the needle valve regulating the fu fuel el supply so that tha less less' gasoline will willbe be sprayed into th the mixture or by opening the air valve to admit more air and thus dilute the rich gas Editor I have an Oldsmobile 1913 model with a a. Inch four-Inch bore and nd six six six- inch stroke and while it is a very good good car car t has ha's not enough power I have lave been advised and not advised to have lave cylinders and also advised advised advised ad ad- about raising cylinders to eliminate elim- elim nate hiate knock due to high compression Now everybody tells me something dIfferent therefore do not think that tha the he people I have spoken to know much about the car so am writing to you o i for some suggestion JOS FARR j Would not advise you to the c cylinders lInders Unless there is e enough ough cylinder walls to enable you ou to o increase the bore by at least one- one eighth of an inch This operation is costly and would also mean new pis- pis tons ons Would not advise raising the cylinders for in so doing the power will be decreased Would suggest that the he timing of ot the valves and ignition be changed and an efficient put on Editor An advertisement has come to my notice notice- to the effect that valve sleeve-valve motor is the only automobile power plant which Involves virtually no upkeep upkeep upkeep up up- keep expense The advertisement also states that carbon deposit only serves to make the motor run sweeter instead of noisier I cannot und understand how a carbon deposit can affect a sleeve- sleeve valve type of ot motor other than with the usual effects of pre-ignition pre causIng causing causing caus caus- ing loss of ot power and knocking E. E J J. J T. T A carbon deposit has a a. bad effect on all types of motors In the sleeve- sleeve type motor It has the effect of ot diminishing diminishing diminishing dimin dimin- the valve area b because cause the possible possible possible pos pos- sible filling of ot the valve cuts in the sleeves Carbon causes loss of ot power pre-ignition pre and undue knocking in all motors I I Editor Kindly advise me if it is proper torun to torun I run a a. Ford car downhill car downhill with the clutch In high speed with the engine running and the throttle retarded A friend of mine tells me the clutch should be in neutral and the foot brake should be used Please let me know which is correct K A A. A SMITH S car might be operated while descending de descending descending de- de a a. grade in several ways The car might be allowed to coas coax having the clutch In neutral and using either the hand or foot brake The clutch might be left in and the switch turned off thus using the motor as a brake or it might be operated as you rou sug sug- gest The operation depends upon th the running conditions I Regarding the change of oil would woul say that It is a a. good practice to change chang the oil in the lubricating system a aleast at least once every 1000 miles Edl Editor Five weeks ago I had new bands pu pum put In m my Ford car and had my lily differentia fixed as it was nois noisy since then the the there e has been a grind in the transmission trans trans- mission When I put my foot on th the brake the grind is very ver distinct also ais the car moves forward every m I called the Ford ord Motor company's at atten attention at- at ten lion to the grind when 1 I took toole th the car out and ami the they told me lh that it was wa I the lie high h ends on the bands I cle cut all the old oil from the transmit slon sion and still it grinds I use a light ht oil Mobile 1 oil I jacked up Ih two hind wheels with the lever in neutral I turned the outside wheel and th the ir iride ide wheel went around as if it it were in m speed continuously Can it be po pcs pcs- sible that the rear axle assembly i is out of line also when can I fell ll The car is two months old FRANK KENNY Your trouble is no doubt due ue to a dragging band If It the bands drag on the drums the internal gears are arc un under under under un- un der a working strain and will cause an unnecessary noise Would advocate the use of ot a good gear oil oU in th the drums Grease will cause a drag also If too heavy If the bands are properly ad adjusted adjusted ad- ad the noise will no doubt stop Automobile Editor I am going to have my car six six- cylinder 1915 Mitchell overhauled and then store it for the rest of the winter wInter win wIn- ter and would like to have some som advice on on the following points 1 Is I-Is Is cutting out carbon by the old method better than burning it out and andIs Is it necessary to take the cylinders ou out in doing this 2 2 Would Would you advise the springs now greasing the transmission etc or wait walt until a week or so before taking the car out in the spring 3 ls Is Is jt It h necessary to remove oil from crank case case Also is it t necessary to turn the motor over once In a while 4 Is 4 Is it necessary to cover up thoroughly thoroughly thor thor- the car in a private e garage without without without with with- out any heat 5 Is 5 Is it necessary to put anything on the body of the car to retain the brilliancy brilliancy bril bril- Hancy of the varnish 6 ls 6 Is it necessary to cover the upholstery up uphOlstery up- up of ot the car to kep out the dust etc FRANK WHITE JR The removal of carbon by the oxygen method is practical and up-to-date up and represents the least amount o ot of trouble for this this' Work In order to scrape the carbon c out properly the cylinders cylInders cylinders cyl cyl- inders should be raised and taken ot off Would advise you to put off oft lubricating lubricating cating the entire car until you are are about to use it then go over every every- thing The oil sh should be drained from the crank case and the case thoroughly cleaned out with kerosene kerosen It Is unnecessary unnecessary unnecessary un un- necessary to run the motor if it the car caris caris caris is laid up permanently The car should be jacked up up ot off the tires the top put lip up and a cover thrown over the entire car The varnish should be washed clean and no preparation applied The cover will keep the dust ot off the upholstering |