Son just got 2011 Malibu 1LS with 4 cyl. Ecotec VVT. Car was basically free, but needs repairs. One issue is possible cracked exhaust manifold. Per videos I know that to check, need to remove heat shield. All videos however do not show a component that exists on our car. I'm not sure what it is and before I just remove, I want to be certain what it is first. It is mounted to the exhaust side of the block on a black bar rail that eminates from backside of block. It is sitting just above the heat shield (blocking access to bolts of shield). It has an electronic connection to black component and a metal tube (Aluminum? Or steel?) about 3/4" diam. that wraps around driver side of block and goes to other components at the front of engine below intake manifold. I thought maybe a cooling line for the oil in the top ofhead?It's the part back behind the spark plugs. Can anyone kindly indicate what this item is and does?