I'm not a mechanic but I can handle most projects that I take on. Here is my problem. I was going to change my glow plugs, read up on how to do it. Seemed like it was fairly simple. That was until I reached the back bolt on the valve cover. Is there a special tool needed to to remove that bolt? I couldn't get a box wrench on it and was barley able to get a socket on it but not with the ratchet on it. Any help would be appreciated.