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Home >> Buick >> 2009 >> Allure CX >> Repair and Diagnosis >> External Pages >> Different variant/trim >> Section 1 (Engine Mechanical - 5.3L) >> Description and Operation >> New Product Information >> A Component Comparison from the Previous Year

A Component Comparison from the Previous Year

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Second design engines will use a rivet-type plug replacing the coolant air bleed covers located at the top rear of each cylinder head. To properly repair a leaking plug, remove cylinder head from the engine, remove the plug from the cylinder head and install first design coolant air bleed cover and bolt. Refer to Engine Coolant Air Bleed Pipe and Hole Cover Installation .