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Show FIND ENGINE TROUBLE BY SOI ND Hissing Cylinder releass cock open, walls scored, head gasket loose, park plug loose or broken Hi--hu or Whistling Air leals in manifold iQinls. Hissing, Back Firing valve Btema bent. t Knocking .spark too far advanced; lower crankcase bolts loose K ik ck at Hih Speed W "rn piston, j knock When Spark i- iancod t'arbon in combustion chamber Short, Metallic Knock Cylinder blOCk loose. I Knock From Overheating w atcr jackets clogged. Dull. Metallic Knock Worn or loose piston pins. Sliuri Knock I.no- connecting rod: tappet out of adjustment. Heavy, Metallic Knock Looseness ..t . n i play in main bearings. Dull Knock 1. -oso camshaft bearing bear-ing nicking Fan blade jUrikJr: ob,-st.iiv. ob,-st.iiv. broken fan hub bearings. ,,i . Boked j I vui worn; mrung gear loos or teeth worn. Dull Pound Loose flywheel; loose runk isei overheated voun .sy.sfuii due to radiator leak. etc. Grinding, Squeaking Oil level too low pump obstructed, Spunking Magneto er distributor, bea 1 1 iiks dry. lilovting Sound Mil leaking through crankcase gaskets. Hark filing Broken or weak valve spring". Misfiring-- Spark splug gap too small. Even experienced motorist" find It hard Bometimea to lOCntS various engine en-gine troubles. This chart will help ou do it. It Is a compilation of all kinds of soun.N emanating from beneath be-neath the hood and the caus of each Keep thm list bandy. It will shorten tnanv a sear, h for 'h source of som dangerous knock or pounding. |