mike519: "I have also heard the s54 is just a noisy engine. Could this kind of tick just be normal? If so, I am a pretty picky guy and would like to reduce it as much as possible."
antennahead: "Sounds like a cross between noisy valves, frying bacon and a rattle snake. I'd worry more if the noisy didn't occur, then I'd be wondering what was wrong with my S54!"
mike519, if you're bothered by the S54's noise, just conjure up this image and you'll feel better: