TNV DI Service Manual 14-7Troubleshooting Charts TNV DI Service Manual TROUBLESHOOTINGTROUBLESHOOTING CHARTSTrouble Symptom Starting Problem InsufficientEngine OutputPoorExhaustColorHigh Knocking Sound During CombustionAbnormal Engine SoundUneven Combustion SoundEngineSurgingExcessive Engine VibrationDifficulty in Returning to Low SpeedExcessive Fuel ConsumptionEngine OilExcessive Blow-by GasEngineCoolant Air IntakeExhaust Temperature RiseCorrective Action Reference PageEngine Does Not Start.Engine StartsBut StopsSoon.Exhaust Color DuringWorkDuring IdlingDuring Work OperationExcessive Oil ConsumptionDilution by Diesel FuelOil with WaterLow Oil PressureOverheatLow Water TemperaturePressure DropPressure RiseExhaustSmokeOrdinaryWhiteBlackWhiteBlackCauseNoneLittleMuchEngine SystemImproper Intake / Exhaust Valve Clearance O O O O O O Adjust the Valve Clearance. See Measuring and Adjusting ValveClearance on page 6-60.Compression Leakage from Valve Seat O O O O O O O O Lap the Valve Seat.See Valve Face and Valve Seat onpage 6-40 for 2 valve head or ValveFace and Valve Seat on page 6-40 for 4valve head.Intake / Exhaust Valve Seizure O O O O O O O O O O O Correct or Replace Intake / ExhaustValve.See Removal of Intake / Exhaust Valveson page 6-36.Cylinder Head Gasket Blowout O O O Replace the Gasket. See Removal of Cylinder Head onpage 6-50.Seized or Broken Piston Ring O O O O O O O O O O O O Replace the Piston Ring. See Reassembly of Pistons onpage 6-84.Worn Piston Ring, Piston or Cylinder O O O O O O O Perform Honing and Use OversizeParts. See Honing and Boring on page 6-83.Seized Crankpin Metal or Bearing O O O O O O O Repair or Replace. See Inspection of Crankshaft onpage 6-81.Improper Arrangement of Piston Ring Joints O O O O Correct the Ring Joint Positions. See Reassembly of Pistons onpage 6-84.
