Enginenoiseabnormal-Knocking:●Carbonbuiltupincombustionchamber●Fuelqualitypoorortypeincorrect●Sparkplugtypeincorrect●Engineoverheating●ECUdefectivePistonslap:●Pistonclearanceexcessive●Cylinderorpistonworn●Connectingrodbent●PistonpinorpistonpinholeswornValvenoise:●Valveclearanceincorrect●Valvespringbrokenorweak●Camshaftbearingorcamfaceworn●RockerarmwornOthernoise:●Connectingrodsmallendclearanceexcessive●Connectingrodbigendclearanceexcessive●Pistonringworn,brokenorstuck●Pistonseizedordamaged●Cylinderheadgasketleaking●Exhaustpipeleakingatcylinderhead●Crankshaftrunoutexcessive●Enginemountsloose●Crankshaftbearingworn●Primarygearwornorchipped●Camshaftchaintensionerdefective●Camshaftchain,sprocket,chainguideworn●Decompressionspringbroken●AlternatorrotorlooseAbnormaldrivetrainnoise-Clutchnoise:●Clutchhousing/frictionplateclearanceexcessive●Clutchhousinggearworn●MetalchipjammedinclutchhousinggearteethTransmissionnoise:●Crankcasebearingwornordamaged●Transmissiongearwornorchipped●Metalchipjammedingearteeth●EngineoillevelorviscositytoolowTROUBLESHOOTINGGUIDE189
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