OCR Text |
Show - THE SALT LAKE TRIBUNE, SUNDAY MORNING, SEPTEMBER 18, 192L 16 Engine noises might be divided Into the kind,: Hlsslnr, dull pounding, knocking, tapping or clicking, grinding or growling, and squeaking. The hissing will generally Indicate that either the exhaust manifold is loose or cracked, allowing the exhaust gases to escape at E or F" of the illustration; that these gases are escaping bet oca the valve stem and guide at W; or that there Is leakage of the exploded gases. This leaksge mtrht be at the spark plug, either through the plug itself ae at A or past the threads and gasket AA. Tightening or Is the romedy. The leakage replacl-.may be at the' compression cock, either past the threads B or through the valve st BB. The s'em may also be broken at B. Then again the leakage may be past the threads and gasket of the valve caps, as at C, paat the valve, or the piston rings The latter leakage may be due to the rings having lost their elasticity, to being broken, worn or scratched (scored), to having the slota in Une or to carbon getting In the grooves. Ae the air enters the auxiliary valve of the carburetor there will also be a hiss, but thia ia quickly recognized, the same being true of the hlsa due to a steaming radiator. With the exception of the hlsa due to the exhaust manifold, valve stem and carburetor, a hiss Is generally a sign of loss of compression and, therefore, loes ef t power. The dull, pounding noise Is generally an Indication that the mixture ia too Hrh; that the trpark la too far advanced; that there Is overheating, or that there la carbon in the cylinder or on the piston head as at II, or valve head G. While the engine will not give Us best service If It has any one of these faults. It may be almost ruined because of the overheating. It would be well, therefore, to deteimine the cause of a dull pounding noise, which can readily be 'done by a process of elimination. The knock Is generally a sound which should be regarded as a danger signal. ' as It ta generally a sign that some part, subject to the full force of the explo-- 1 ions. Is loose. Failure to locate It may result In an expensive breakdown. A knock may be due to a worn or wrist pin bushing I; worn or j broken broken connecting rod bearing J; loose connecting rod cap K; worn or broken mam bearing L. or loose main bearing e cap M. Also to a loose gear, or flywheel, to play In the grooves of the discs of a disc clutch, or to loose cylinder blocks Of course, there can be Innumerable other ways, such as nuts or even tools being left In the engine when repairs are made, or using a spark plug when a short should be used, thus having the plug hit the valve head. Whl.e many stunts and devices are constantly being given to locate knocks, 't is the writers opinion that the novice should let an experienced mechanic do this, as sound will carry through the metal of an engine and seem to come from an altogether different spot from that where It originates, and so a really dangerous knock may be mistakenly eon- dered harmless, A knpek is a sign of . danger, to the engine. Like the knock, the tap or click' Is generally a sign of a loose or worn part, but the part Is generally one which Is not under so great a load, and will most often come from some portion of the valve mechanism. Probably 90 per cent of the taps are due to the valve adjusting nuts not being properly set, so that there is a Bpaee between the valve stem and nut, at P. The clearance here should ce about that of the thickness of a piece ot nianila wrapping paper. The tap also mav be due to the surfaces St P being worn at an angle, causing a side slap of the valve stem against Its guide at W. or of the push rod against Its guide at V, to a broken spring o. to worn roller Q. to chipped cam R, to worn ramshaft e bearings, to worn gear key 8, to a slapping chain U, to loose or broken or to a piston rings D, piston slap which Is caused by a worn piston and c Under. Tbs piston slap will give from a slight tapp.ng sound to a distinct knock. As a rule a4ap ta not dangerous, but it Indicates looseness, and should, therefore, be looked to. V here there are gears there will always be a certain amount of a humming or growling noise Thus In an engine a growl will usually come from the halftime, magneto or generator drive gears as at T. When it does not corns from a gear, It wll come from some Irregularly shaped part, such as a gear, chain,, fan or pump blade rubbing, or to parts having been roughened occause of lack of lubricating and be rubbing, or to worn or dry roller or ball bearings. Thus a growl may come from the timing gears, from a chain V rubbing against Its housing, fan rubbing against radiator or engine, pump blade rubbing or to lack of lubrication of any moving part or ball or roller bearings. As lack of lubrication Is liable to be the cause, the reason for a growl should be found as quickly as possible. With the exception of a slipping fan belt, a squeak ia an Indication that some parts are rubbing without lubrication. While It may come from any of the parts for which a lubricating system Is furnished, It Is usually due to some part, because of wear or its being bent, coming in contact with another part, which it is not supposed to touch. Tabulating the above as much as possible, and referring to the Illustration, ws And that HISSING may come from A AA, B, BB, F. G, the carburetor, or a steaming radiator. DULL POUNDING from carbon, too rich a mixture, overheating, spark too far advanced. ' , KNOCKING , firom I. J, K, L M, N. S. loose, flywheel, loose timing gears, clutch or Improper parts, as too long a spark plug. TAPPING from O, P, Q, R, 8. W, U. N, D. GROWLING from gears, as T. rubbing chain V, rubbing fan, pump, or lack of lubrication, SQUEAKING from a slipping fan belt, laclr of lubrication, bent or worn parts rubbing. y' foTTowinf A New Cadillac and a New and Glorious Zest in Motoring g If you are the own- The new Cadillac Type .61 carries with It, of course, all of the positive assurance of 60und, enduring value which has always been associ- ated with the very name Cadillac. Needless to say, there is all of the old reliabili- ty, responsibility, and regularity of perform-- . once more pronouncedAhan ever because in the Cadillac plant the passage of1 time is a continuous process of improvement. But in addition to these hidden 'traits of character! which have made It the worlds standard of motoring efficiency the Type 61 Eight Cylinder Cadillac brings you other positive and quickly recognizable qualities which immensely enhance ease and enjoyment. Within a few minutes from the time you have taken the wheel you will discern a more pronounced quality of resilient roadability than the Cadillac has ever developed before. In other words, it is our judgment, that this Type 61 accomplishes the greatest advance yet recorded in overcoming road discomfort and insuring riding ease. , Largely by way of simple but fundamentally sound changes, such as lowering the center of gravity without decreasing road clearance, smoothness of travel has been surprisingly x improved. Agaiq, a recently adopted and equally simple n -- er of a Ford beware lubricants that are too heavy, to meet the peculiar construction features ' of the Ford engine and clutch. i -- trait-tim- f ; A heavy oil should never be used in a Ford to do so in cool weather is dangerous in cold, weather it means certain ruin. Even in Summer it is un- suited to. the en: -- gines require-- , ments. .Simplex Ford Motor Oil a member of the great VICO family is refined to meet exactly the specificati o n s of the Ford Motor Co. , It resists heat flows in freely coldest weather lubricates perfectly. It is the safe f mmediately -- I long-bodi- ; s. . v improvement inv carburetor practice has bettered Cadillac acceleration so that its pro- verbial, swift surge of power is even more half-tim- Phaeton Road ter Touring Car ........ ...... ........... $3799 3790 3940 .... per gallon of gasoline increased. The new Cadillac gets away grandly, and communicates both to the one at the wheel and those in the tonneau, a sense of pent-u- p reserve power that is delightful. The same simple changes that have given It a greater degree of road resilience have brought with them much greater beauty than before. The Type 61 is a delight to the eye not merely at the first admiring glance, but in the wealth of attractive details which a closer inspection reveals. Experienced motorists will delight In the artistic and convenient arrangement of the instrument board, the windshield and ventilator improvements, the restful simplicity and grace of the new steering wheel and controls, the convenient inspection lamp, and other refinements of a most pleasing character, Incidentally, Cadillac coach t work has Improved upon itself so that the new car comes to you not only with greater charm of general design JOut a far more impressive and beau1 r A tiful finish. These latter are the lesser satisfactions the real delight will come in the revelation of greater riding ease and roadability, and swifter acceleration. A delightful experience is in store for Cadillac alike. owners and non-owne- rs wenger Coupe $4540 Coupe - . . Sedan F, Ol B. JMnk, Wtr 4690 4950 Two-P- a Victoria er brought into action and mileage 4540 Tm . Suburban . . . Limousine . Imperial Limousine i $5190 5390 5390 to CADILLAC MOTOR CAR COMPANY, DETROIT MICH. Division of General Motors Corporation SHARMANAUTOMOBILE CO., BOISE. C 51 I A DENVER. SOUTH STATE ST. LLA C CD,; (The Standard of the World MM J JtZz i' |