Need help with a oil leak

So i just bought a 97 tacoma with a blown motor (3.4). So i purchased a another one off craigslist. They claimed it had a 130k. I bought it and did the install, fired it up and it runs really good. My problem is when u get on it like merging on the freeway or hammer on it going down the street it starts to leak oil. And thats were i'm getting frustrated its leaking around the front spark plug hole on the driver side, its like it was coming out of the seal around the spark plug and goes down the plug tube and some runs down onto the exhaust manifold. I cleaned the spark plug hole, changed all the gaskets and seals on the driverside because that was the only place it would leak. I replaced the pcv,and put it all back together. Took it out drove it on the freeway and now its leaking on the passanger side back hole and its coming out under the coil pack and putting some down the tube were the spark plug is. Before i changed the driver side gaskets i cleaned it all up and just town drove it there was no leaks. It seems to be only when u put a load on it. And the passanger side never leaked untill i fixed the driver side. Anyone ever had or hear of this before?

 

you might just need a new valve cover gasket? thats what it sounds like to me! i could be wrong, but check it out also make sure all your valve cover bolts are tight.

 

yes but not too tight! so some serious reading on this before you do anything
http://www.yotatech.com/f2/5vzfe-leaky-valve-covers-fixed-56k-beware-149594/
http://www.yotatech.com/f2/valve-cover-gasket-replacement-52695/
http://www.yotatech.com/f2/3-4-head-gasket-project-202499/

 

very true good call!