Oil Consumption Is Excessive
- Incorrect oil level in the crankcase
- Oil leaks on the outside of the engine
- Oil leaks in the combustion area of the cylinders
- Oil leakage at the injector
- Incorrect oil viscosity
- Condition of turbocharger
Note: The procedures have been listed in order of probability. Complete the procedures in order.
Show/hide table
| Troubleshooting Test Steps | Values | Results |
|---|---|---|
1. Excessive Oil in the Crankcase A. Check the engine oil level. Too much oil in the engine crankcase can cause the engine to consume oil. B. Ensure that the dipstick is properly calibrated and/or that the dipstick is correct for the application. Calibrate the dipstick and/or replace the dipstick. Refer to Systems Operation/Testing and Adjusting, "Lubrication System" for calibration of the dipstick gauge. |
Oil level |
Result: The oil level is correct. Proceed to Test Step 2. Result: The oil level is high. Remove excessive engine oil from the crankcase. Verify the repair. |
2. Oil Leaks on the Outside of the Engine A. Check for oil leaks on the outside of the engine. Refer to Systems Operation/Testing and Adjusting, "Lubrication System". |
Oil leaks |
Result: There are oil leaks on the outside of the engine. Find the source of the oil leaks and make the necessary repairs. Result: There are no oil leaks on the outside of the engine. Proceed to Test Step 3. |
3. Oil Leaks in the Combustion Area of the Cylinder A. Check for oil leaks in the combustion area of the cylinders. B. Check for excessive engine blowby. Excessive engine blowby will cause unnecessary oil consumption. Excessive engine blowby can also cause unnecessary engine wear. |
Oil leaks |
Result: There are oil leaks in the combustion area of the cylinder. Make the necessary repairs. Replace parts, if necessary. Result: There are no oil leaks in the combustion area of the cylinder. Proceed to Test Step 4. |
4. Oil Viscosity A. Excessive consumption of engine oil can also result if engine oil with the wrong viscosity is used. Engine oil with a thin viscosity can be caused by fuel leakage into the crankcase or by increased engine temperature. Refer to the Operation and Maintenance Manual for additional information. |
Viscosity |
Result: The engine oil viscosity is correct. Proceed to Test Step 5. Result: The engine oil viscosity is not correct. Replace the engine oil, Refer to the Operation and Maintenance Manual for additional information. |
5. Condition of Turbocharger A. Check the turbocharger for leakage. |
Turbocharger |
Result: The turbocharger has leakage. Make the necessary repairs. Replace parts, if necessary. |
Complete the procedure in the order in which the steps are listed.
Caterpillar Information System:
C13 Industrial Engine NRS Exhaust Gas Temperature Is High
C13 Industrial Engine NOx Conversion Is Low
C13 Industrial Engine Intake Manifold Air Temperature Is High
C13 Industrial Engine Inlet Air Is Restricted
C13 Industrial Engine Idle Speed Is High
C13 Industrial Engine Fuel Temperature Is High
2014/12/19 A New Hazardous Location Customer Connection Harness Is Available for Certain C9, C15, and C32 Commercial Engines {1408, 1900}
C13 Industrial Engine Fuel Pressure Is High
C13 Industrial Engine Fuel Consumption Is Excessive
C13 Industrial Engine Exhaust Temperature Is High
C13 Industrial Engine Exhaust System Contains Oil
3500 Generator Sets Maintenance Interval Schedule - High Displacement
2014/12/12 New Compressor Bypass Valves and Software Are Used on Certain G3500 Engines {1803, 1920, 5510}
C280 Marine Engines Dosing Control System Operation
C280-08 Tier 4 Engine Engine Oil Filler and Oil Level Gauge - Remove and Install
C280 Marine Engines Diesel Exhaust Fluid Quality - Test
C13 Industrial Engine Oil Contains Coolant
C13 Industrial Engine Oil Contains Fuel
C13 Industrial Engine Oil Pressure Is Low
Commissioning Procedure for the 794 AC, 796 AC, and 798 AC Off-Highway Trucks {1000, 7000, 7961} Commissioning Procedure for the 794 AC, 796 AC, and 798 AC Off-Highway Trucks {1000, 7000, 7961}
C13 Industrial Engine Oil Temperature Is High
C13 Industrial Engine Power Is Intermittently Low or Power Cutout Is Intermittent
C13 Industrial Engine SCR Warning System Problem
C13 Industrial Engine Valve Lash Is Excessive