Some Chrysler 300 owners report experiencing serious issues when coolant and oil mix, often indicating a blown head gasket. This problem can cause the oil to appear milky or creamy and the coolant to become contaminated. Common symptoms include coolant mixing with oil and blue smoke emitting from the exhaust, which suggests that oil and coolant are burning in the combustion chamber. Improperly installed or incorrectly oriented head gaskets are potential causes of this mixing. To resolve a blown head gasket, owners may need to replace the head gasket or even the entire cylinder head. It is crucial to address these issues promptly to prevent further engine damage, and consulting a professional mechanic for inspection and repairs is strongly advised.
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