Symptom Tree t092
| Cause | Correction |
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Bulk oil supply is contaminated |
Check the bulk oil supply. Drain the oil and replace with non-contaminated oil. Replace the oil filters. Refer to Procedure |
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Engine idle time is excessive |
Low oil and coolant temperatures can be caused by long idle time (greater than 10 minutes). Shut off the engine rather than idle for long periods. If idle time is necessary, raise the idle speed. Refer to Refer to the Operation and Maintenance Manual, Bulletin No. |
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In-line check valve(s) is installed backward or has an incorrect part number |
Check the in-line check valve(s) for the correct part number. Check the arrow on the check valve(s) for the correct orientation. Refer to the OEM service manual. |
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Fuel pump seal is leaking |
Perform the fluorescent dye tracer test to confirm the fuel leak. Replace the fuel pump if necessary. Refer to Procedure |
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Top injector o-ring or injector timing plunger is damaged |
Perform the fluorescent dye tracer test to find the damaged injector. Replace the injector or o-ring. Refer to Procedure |
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Injector high-pressure connector torque does not meet specification |
Check the injector high-pressure connector torque.Refer to Procedure |
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Cylinder head is cracked or porous |
Remove the intake and the exhaust manifolds. Check for evidence of coolant leaks. If necessary, operate the engine at low idle. Pressure-test the cylinder head. Refer to Procedure |
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Base engine problem |
Check the engine for high crankcase pressure, low compression, static injection timing, damaged pistons, camshaft, and other parts. Refer to Refer to the Troubleshooting and Repair Manual, ISM, ISM |
