To be sure.... is it oil or is it coolant? If oil I'd say the gasket has failed between the cooler and the block. If coolant, then one of the hoses is failing.So I just did this on my 2006 Xterra Offroad. I used a torque wrench on the combination bolt (36 ft. lbs.). Now it leaks worse than before. Is it the oil cooler? The hoses? Any suggestions?