I've replaced the valve cover gaskets, cam tensioner gaskets, and half moon gaskets, but still have an oil leak on the driver side. After replaceing these gaskets, the oil leak has stopped on the passenger side, but still continues on the driver's side. I have not yet replaced the rear cam cap/covers and am afraid to do so. I have read that these need to either be puntured and pryed out with a screwdriver or extracted with a special tool. I fear that I may cause unwanted damage and not be able to get them out if I punture them as others have done. What steps should I take next to eliminte this oil leak?