I've been noticing that my car has been having some wierd surging at around 2800RPM. Everyone says that it is because of the stock tune (which I am sure isn't helping) but it didn't do this before. Last night I looked at it and I noticed it is leaking some oil out right at the base where it goes into the head! Has anyone had these issues before? Can I take that bolt out and pull it out to replace the seal?