For about the last month or two, I have been having a pretty bad vibration whenever the rpm's get above 3k. I never could figure out what was causing it until this yesterday when I was checking the spark plugs and I felt one of the header primaries sitting on part of the motor mount.
My question is, how difficult is it to change them? I assume I will have to put a jack on the oil pan, but how should I go about this?
I just want to make sure I don't f*** anything up.