4 ENGIN E SY M PTOMS DIAGNOSTICS 99
Table of Contents
Problems and Conditions............................................................................................101
Combustion Leaks to Coolant.............................................................................102
Aerated Fuel...................................................................................................104
Aerated Fuel Inspection...........................................................................104
Alternate Fuel Source Supply to Fuel Pump...................................................106
Alternate Fuel Source Supply to Fuel Filter Housing........................................107
Combustion Leaks to Fuel........................................................................108
Coolant in Lube Oil...........................................................................................109
Coolant System Inspection.......................................................................109
Air Compressor Leak Test.........................................................................110
Front Cover Inspection.............................................................................111
Cylinder Head Leak Test...........................................................................112
ECM Reset / IDM Reset (intermittent engine stumble).................................................113
Excessive Fuel Consumption..............................................................................114
Fuel in Coolant................................................................................................115
Coolant Leak to Exhaust....................................................................................117
Coolant Over-Temperature..................................................................................119
Coolant System Inspection.......................................................................119
Temperature Sensor Validation Test.............................................................120
Cooling System Operating Pressure Test......................................................121
Lube Oil in Coolant...........................................................................................122
Fuel in Lube Oil...............................................................................................124
Low Oil Pressure.............................................................................................128
Oil Inspection........................................................................................128
Oil Pressure Regulator Inspection...............................................................129
Oil and Crankcase Inspection....................................................................129
Oil Pump Inspection................................................................................130
Front Cover Inspection............................................................................131
Priming Fuel System.........................................................................................132
Rough Idle..... ......... .......... ......... ......... . ........ . . ....... . . ....... . . . ....... . . ....... . . . ....... . . .135
Smoke..........................................................................................................137
Black Smoke.........................................................................................137
White Smoke.........................................................................................137
Low Power (Turbocharger Assembly and Actuator)...................................................139
EGES-270-1
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
Follow all warnings, cautions, and notes.
© August 2008 Navistar, Inc.
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