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Base Engine Misfire with Coolant Consumption - LE5 or LE9

Cause

Correction

Faulty cylinder head gasket and/or cracking, or other damage to the cylinder head and engine block cooling system passages.

Coolant consumption may or may not cause the engine to overheat.
    • Inspect for spark plugs saturated by coolant.
    • Perform a cylinder leak down test.
    • Inspect the cylinder head and engine block for damage to the coolant passages and/or a faulty head gasket.
    • Repair or replace as required.
   


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