Symptom Tree t118-011
| Cause | Correction |
|---|
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Engine block heater is malfunctioning (if equipped) |
Check the electrical sources and wiring to the cylinder block heater. Replace the block heater, if necessary. Refer to the OEM service manual. |
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Coolant temperature is below specification |
Refer to the Coolant Temperature Below Normal symptom tree. |
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Engine is operating at low ambient temperature |
Check the winterfront, shutters, and under-the-hood air. Use under-the-hood intake air in cold weather. Refer to Operation of Diesel Engines in Cold Climates, Bulletin 3379009. |
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Fuel grade is not correct for the application or the fuel quality is poor |
Operate the engine from a tank of high-quality fuel. Refer to Fuel for Cummins Engines, Bulletin 3379001. |
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Lubricating oil rifle pressure during cold start is below specification |
Check the viscosity sensor. Refer to Procedure 007-041. |
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STC oil delivery system is restricted or has a flow loss |
Check the STC oil delivery system. Refer toProcedures 006-045. |
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Overhead adjustments are not correct |
Measure and adjust the overhead settings. Refer to Procedure 003-004. |
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Raw fuel in the intake manifold |
Check the intake manifold for fuel. Refer to Procedure 010-023. Locate the fuel source and repair as necessary. |
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Injector cup is damaged or is not correct |
Check the injector cups for damage and for correct part numbers. Refer to Procedure 006-026. |
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Injector is malfunctioning |
Perform the single-cylinder cutout test. Replace the injectors as necessary. Refer to Procedures 006-005 and 006-026. |
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Static injection timing is not correct |
Check the static injection timing. Refer to Procedure 006-025. |
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Coolant is leaking into the combustion chamber |
Refer to the Coolant Loss – Internal symptom tree. |
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Valve protrusion is below specification |
Check the valve protrusion. Replace the valve seat inserts or the cylinder head. Refer to Procedures 002-004 and the M11 Shop Manual, Bulletin 3666075. |
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Injector protrusion is not correct |
Check the injector protrusion. Refer to Procedure 006-026 and the M11 Shop Manual, Bulletin 3666075. |
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Pistons or piston rings are worn, damaged, or not correct |
Check the pistons for correct part numbers. Refer to Control Parts List (CPL), Bulletin 3379133 or 4021327. Check the pistons and rings for wear and damage. Refer to Procedure 006-026 and the M11 Shop Manual, Bulletin 3666075. |
