Need to replace the valve cover gaskets on the M5, it's an oil slick in there. I don't expect you lot to have experience of the specific refined supercar in question, but I assume it's fairly common on other cars. Basically I've unbolted the millions of bolts, but I still can't lift the valve covers off the head. They are stuck fast. I've tried tapping with a mallet but no joy. Do I need to tap harder, or is there some sort of knack to this delicate procedure? I've tried a claw hammer in the oil filler hole to get some leverage, nothing. No joy. Alternatively, if anyone wants to buy a car in bits, sensible offers will be considered. <g>