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Troubleshooting tableFaultEngine does not start, or starts only with difficultyEngine starts but does not reach full speed or stallsEngine idles out of true when warm, misfiringEngine speed fluctuates during operationPower output unsatisfactoryCoolant temperature too high, coolant being lostLube oil pressure too lowLube oil pressure too highBlack smoke accompanied by loss of powerBlue smokeWhite smokeKnocking in the engineEngine “too loud”ReasonDTension of water-pump V-belts incorrect (slip)DCap with working valves on expansion tank / radiator defectiveor leakingDTemperature gauge defectiveDCoolant pipes leaking, blocked or twistedDOil level in sump too lowDEngine temperature too highDOil filter cloggedD DOil pressure gauge defectiveD DSelected oil viscosity not suitable for ambient temperature(oil too thin)DOil in sump too thin (mixed with condensation or fuel)DEngine coldD D Engine, coolant or intake air still to coldD Lube oil getting into combustion chamber(piston worn, piston rings worn or broken)D Overpressure in crankcase (crankcase breather clogged)D long operation under a low loadD Coolant getting into combustion chamber(cylinder head / gasket leaking)D Engine operating temperature incorrectD Intake or exhaust pipe leaking67