Mine was leaking very small amount from the vent covers on top of the valve covers. I fixed it myself. I bought high temp RTV to do the gaskets, chased the threads, etc. put it back together. No leaks. Needs to cure before you run it. There is a Sticky ,I think. Do a search" valve cover leak" should bring it up. didn't take very long. Just don't tighten too much on the screws as they are aluminum and easy to break. Let us know how it goes.