I have done the chains guides tensioner oil pump and a bunch of other stuff. I have started to note an oil path from the drain plug to the corner of the block (passenger side rear corner). I just got done readinga post by Colby, someone who gives good advice. He says that these engines (2.2 L ecotec) dont leak oil unless you crack the pan. There are no signs of damage to the oil pan, however when i tighten the 2 loose bolts, which are just by the oil pickup in the pan, the leak and sometime cold start cam chain tensioner noise go away. The first time I tighten the 2 bolts I thought the problem was solved. I THOUGHT the problem was solved but after reading Colbys post it seems like I have an oil pan thats warped or worse one that has a crack?