Tag Archives for troubleshooting

3116 and 3126 Truck Engines Oil Leakage Into Combustion Area Of Cylinders

Oil leakage into the combustion area of the cylinders can be the cause of blue smoke. There are four possible ways for oil leakage into the combustion area of the cylinders: * Oil leakage between worn valve guides and valve … Continue reading

26. July 2017 by sam
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3116 and 3126 Truck Engines Oil Leakage On Outside Of Engine

Check for leakage at the seals at each end of the crankshaft. Look for leakage at the oil pan gasket and all lubrication system connections. Check to see if oil comes out of the crankcase breather. This can be caused … Continue reading

26. July 2017 by sam
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3116 and 3126 Truck Engines Air In Fuel

Probable Cause: Install a 4P8278 sight glass in the fuel return line and operate the engine to check for gas bubbles, an indication of air in the fuel system. With air in the fuel system the engine will normally be … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Soot In The Inlet Manifold

Probable Cause: * Engine Design * Defective Valve Or Seat 1. Engine design: On diesel engines a small amount of soot is normal. This is due to the design characteristics of the engine. Valve overlap allows the intake to open … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Loss Of Coolant

A. Outside Leaks (Go to Step 1) Probable Cause(s): * Leaks In Hoses Or Connections * Leaks In The Radiator And/Or Expansion Tank * Leaks In The Heater * Leaks In The Water Pump * Cylinder Head Gasket Leakage B. … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Problem Fuel In Coolant

Probable Cause: * Defect In Unit Injector Sleeve 1. Defect in unit injector sleeve: Remove unit injectors and inspect sleeves in cylinder head unit injector bores. Look for signs of cavitation erosion or cracks. Cavitation on the inside may be … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Problem Fuel In Lubrication Oil

Probable Cause(s): * Defective Upper Seal On Unit Injector * Porosity In Cylinder Head * Porosity In Fuel Filter Base * Defective Seal In The Fuel Transfer Pump 1. Defective upper seal on unit injector: Check for a defective O-ring … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Problem Alternator Has Noise

Probable Cause(s): * Drive Belt For Alternator Is Worn Or Has A Defect * Loose Alternator Drive Pulley * Drive Belt And Drive Pulley For Alternator Are Not In Alignment * Worn Alternator Bearings 1. Drive belt for alternator is … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Problem Alternator Charge Too High

Probable Cause(s): * Alternator Or Alternator Regulator Has Loose Connections * Alternator Regulator Has A Defect * Alternator Field Lead Shorted To Battery Voltage 1. Alternator or alternator regulator has loose connections: Tighten all connections to alternator or alternator regulator. … Continue reading

25. July 2017 by sam
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3116 and 3126 Truck Engines Problem No Charging Current, Or Low Or Irregular Charging Current

Probable Cause(s): * Loose Drive Belt For Alternator * Charging Or Ground Return Circuit Or Battery Connections Have A Defect * Alternator Regulator Has A Defect * Alternator Brushes Have A Defect * Rectifier Diodes Have A Defect * Rotor … Continue reading

25. July 2017 by sam
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