Symptom Tree t101
Cause | Correction |
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Asphaltines present |
When asphaltines are present in diesel fuel, it appears black. To verify whether or not engine oil is present, take a fuel sample and perform an analysis to check for engine oil. |
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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 |
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Fuel pump plungers and barrels excessively scored and worn |
Inspect the plungers. A slight discoloration can be evident. Deep scoring must not be evident. If scoring or scratches exist that can be felt, the fuel pump head must be replaced. Refer to |
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