my cars moved in like 5 months. and the oil pan is pretty wet with oil. is there a seal down there or just a sealer? cause i realized i was looseing oil wen i was runng the car before the crash i had. cars now getting fixed. and also i ahve a leak on top of the vave covers but i know i can re do them with rtv or w,e. can the oi pan be done the same way. is this common?