...spark plug holes. What's this mean? I have noticed that the oil is seeping from the holes, around the spark plugs. The car recently started running rough and 'missing'. What does this mean? And how can I fix it?
Ford FE series engine were notorious for valve cover leaks which would run down into the spark plug pockets, they also have a tapered seal area to seal the plugs which can become damaged over the years and then leak a small amount of compressed gas... This appears to be a leak from within the head. My 428 CJ was a bear to stop this leak and Finally had to have the heads machined... and always use top quality cork gaskets (Installed DRY)