dogwoodangel

I recently bought an 02 Outback only to learn there had been an engine swap and I have no idea what it is out of so I can't buy replacement parts. I am in dire need of a pcv valve. It has been hooked up wrong and I don't know for how long. The crank has had no ventilation and I don't need oil leaks developing. (Someone looped it into itself instead of to the intake) Is there any way to find out?