Just so I am not confused and make you confused, Dex-Cool antifreeze is red, not green like we are used to seeing. A lot of mechanics call it "Dex-Mud" and want to get rid of it. If someone did get it out of there, they most likely put some in that is green.
Remember, there is supposed to be a little water dripping from the tail pipe, and there is usually a tiny drain hole at the rear of the muffler to reduce its tendency to rust out from that water, but we are talking little drips, not pouring out. It does sound like a head gasket is leaking, and that correlates to my original story that it can happen anytime and it has nothing to do with the recent oil change, or any other service, or driving too much after dark, or too many left-hand turns. Wait, that was too many right-hand turns!
Probably not the best time for humor, but corroded / blown / leaking cylinder head gaskets are a common occurrence on every car brand and many engine sizes. At the mileage you listed, some cars would be getting repaired for a head gasket a second time.
Replacing head gaskets is a fairly expensive job, but look at it as two more car payments. It is a lot less expensive than buying a different car. This job should be left to an experienced engine specialist. I love working with do-it-yourself-ers and backyard mechanics, but this is one job you do not want to have to do over if you mess it up the first time. A conscientious mechanic who has your best interest at heart will recommend replacing the timing chain and tensioner at the same time to avoid problems in the future and another expensive repair.
Sunday, July 24th, 2016 AT 10:56 PM