I've got a coolant leak somewhere seemingly towards the back of the engine. The starter and area around it have coolant all over, yet what's funny is I don't see puddles on the ground. I think most of it is burning off while running. Someone said there's a freeze plug somewhere back there on the engine but I'll be damned if I can find it. My Haynes book doesn't show them. Can someone please tell me where the freeze plugs are on this engine? Thank you.