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.
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• | 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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