ok, ive got my engine back together but now i hear a horrible ticking noise. i had a bit of an exhaust leak and think im missing and exhaust gasket(dont ask) but now i hear a really bad exhaust leak(no big deal) and what sounds like lifter ticking. i cant tell for sure where it is coming from, but i can smell oil. the temp guage doesnt read hot, but it seems to get hotter quicker than beforre i did my repairs(could be my imagination though). any advice?