Tools Required
WARNING: This page is about a different car, the 2008 Buick LaCrosse and 2008 Buick Allure. However, it is still accessible from the selected car via links, so may be relevant.
J 39313 Spark Plug Port Adapter. See Special Tools .
A compression pressure test of the engine cylinders determines the condition of the rings, the valves and the head gasket.