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Home >> Cadillac >> 2004 >> CTS Base, 3.2 N >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 12 (Engine Mechanical - 3.6L (Ly7) - (Introduction)) >> Diagnostic Information and Procedures >> Base Engine Misfire with Coolant Consumption

Base Engine Misfire with Coolant Consumption

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Base Engine Misfire with Coolant Consumption

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 Starting Point - Engine Cooling in Engine Cooling.
Coolant consumption may or may not cause the engine to overheat.
  • Inspect for spark plugs saturated by coolant. Refer to Spark Plug Inspection in Engine Controls - 3.6L.
  • Perform a cylinder leak down test.
  • Inspect the cylinder heads and engine block for damage to the coolant passages and/or a faulty head gasket.
  • Repair or replace as required.
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