I have a 1989 MB 560SEL. When I first got it, it ran fine. Now the last
3,000 I've noticed that there is always an oily residue on the bottom of the engine, also noticed an oil smell the car when I shut it down (GET OUT). Also I'm blowing blue smoke out the exhaust every time I accelerate from a stop(red light, turning corner. I really hope this does NOT mean the engine is finally going south on me! Is it hard for a shade tree mechanic (at best, maybe) to replace the head cover gaskets without getting to involved? I have
150,000 miles on the odometer.