My daughter Sentra 96 devoloped very heavy oil leak from the area above and to the right from oil filter (looking from underneath and behind the engine ). I think it is oil presure sending unit, but I am not sure. At the same time a lot of water got to the oil. Leak is heavy, so I can see it emediately after turning the engine. Car had just recently replaced headgasket. I wonder if this two leaks, coolant and oil, can be related? Car has 90K. I was advised to have to options: get the new engine (from junk yard) or junk the car. Do I have any more options? Thanks for any help