Hey all! Newbie here, and relatively new to working on cars altogether, so bear with me..

Now, I purchased a "rebuilt" 3.0 V6 3VZ-E engine for $1150 and had a family friend drop it in. He is a self-employed mechanic.

This engine was supposedly rebuilt by someone else 20,000 miles ago, and then that somebody else went out for a day of hardcore wheeling and rolled his truck, and left it sitting in a ditch, upside down, until he decided to part out his rig. From what I hear, the rig was left upside down for so long that the valve cover gaskets became so saturated with oil that they started to leak. The engine still runs good, however, and shows about 160 compression all around.

so me and a co-worker decided to replace the valve cover gaskets today, and then when I went home and went back out, I found there till to be oil spots on the ground. Any Ideas of where it would be leaking? The guy who dropped it in said the rear main seal is brand new.