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Home >> Chevrolet >> 2011 >> Impala LS, 3.9 M >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 4 (Engine Mechanical - 3.5L - Diagnostic Information And Procedures) >> Diagnostic Information and Procedures >> Base Engine Misfire with Coolant Consumption

Base Engine Misfire with Coolant Consumption

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Cause Correction
Faulty cylinder head gaskets and/or cracking or other damage to the cylinder heads and engine block cooling system passages-Refer to Diagnostic System Check - Vehicle .
Coolant consumption may or may not cause the engine to overheat.
  1. Inspect for spark plugs saturated by coolant. Refer to Spark Plug Inspection .
  2. Perform a cylinder leak down test.
  3. Inspect the cylinder heads and engine block for damage to the coolant passages and/or a faulty head gasket.
  4. Repair or replace as required.
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