Hand tight and another half a turn is way too tight for the pan and likely to bend the tabs and cause even more leaking problems. The recommended torque is only 7Nm/5Ft-lbs, which is very difficult to "feel" by hand. It's more like just enough to create a little tension rather than snug.

I eventually had to replace my pan and gasket due to overtorque from the PO. It was a constant battle of leaking problems.

__________________
Sam

84 300SD 350K+ miles ( Blue Belle )