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Base Engine Misfire with Coolant Consumption

Inspection

Action

DEFINITION: Base engine misfire with coolant consumption

Preliminary Inspection

Verify that there are no external coolant leaks. Refer to Symptoms - Engine Cooling .

Isolate Affected Cylinders

    • Cylinder balance test with scan tool
    • Cooling system pressurization
    • Inspection of glow plugs
    • Compression test

EGR System Inspection

    • Inspect EGR valve and intake system for evidence of coolant leakage.
    • Replace the EGR cooler if any problem is found.

Cylinder Head Gasket Leakage

    • Remove cylinder heads of the affected cylinder bank and inspect for damage.
    • Replace components as necessary.

Cylinder Head or Engine Block Damage

    • Inspect the cylinder head for cracks.
    • Inspect the cylinder block for damage.
    • Inspect the cylinder block to head mating surface for straightness.
    • Replace components as necessary.
   


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