FWIW, neither of my cars have the engine cover.
So it sounds like you know your way around the car. If you've checked it over and under and don't see anything that looks like its burning. Just drive it.
178,000+ miles, 5/20/12 new ej257 short block, 8/20/11 installed VF52 turbo, @20.8psi, 280whp, 300ftlbs. CHECK your oil, these cars use it.
Engine Build - Click Here