It would seem that after my first drive since fall last night i have a big oil leak. it is coming from a hole in the oil cooler on the bottom (very small hole) that goes between the oil filter and the block. The round aluminum cooler about the same size and shape as the oil filter. It looks like its a hole with a tiny tiny tiny drive pin in it. or is it just a casting flaw? its hard to see up close. ok if its a flaw than thats why its leaking and i need to replace it no biggy. if its a cast in hole with a pin in it why would it start leaking. oil presures fine so i didnt drop the pump. please tell me someone knows whats up with this. car has 20,000 miles on it running M1 oil. i can post a few pics but you cant see much.