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2007 Hyundai Azera 3.8L, engine knock at starts up stops after 3-10 min.

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Engine knock at start up stops after 3-10 min. This started at 30,000 mi. is getting worse now at 48,000 miles.

Vehicle: 2007 Hyundai Azera 3.8L

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This is a engine problem from a piston wrist pin. as the engine warms up the noise quites down,

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