After working on getting my Maserati Indy on the road it is finally running. However it's got a lot of oil leaking form several places. First of all leaking from the valve covers. I recon this can be fixed by replacing the valve cover gaskets. However it also appears to be leaking form the chain tensioner opening at the front of the head. Anyone know how to stop this leak? Looking in the parts book I think I need rubber o-rings, but I am not sure I am interpreting this correctly. Any help appreciated.