Base Engine Misfire with Coolant Consumption. Pontiac Montana Ext. 2004

For 1990-2009 cars only

Makes 🢒 Pontiac 🢒 2004 🢒 Montana Ext. 🢒 Engine 🢒 Engine Controls - 3.4L 🢒 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 Diagnostic Starting Point - 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 .

•	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.