Okay here's one for the history books. I've owned a 94 Cutlass Supreme for 4-1/2 years, 3.1 liter V-6, had 116,000 miles, never had any trouble except for an alternator and starter, and clogged injectors. So I sell it to some people, they owned the car a whopping 8 days and call me to say the motor has "locked up" on them. Are you kidding me? They supposedly went in for groceries, the car had been running fine to that point. Come back out to go home, the car had trouble starting, then started, then had severe rattling noise, then died. The guy said he put a wrench on the crank and could not turn it over. They towed it and had a mechanic remove the starter in case it was binding the motor, no dice, he said it had a broken cam, or such, that the 3.1 liter engines were notorious for broken camshafts. I'm floored over this whole clusterfazoola. Has anyone else ever seen anything like this, esp when the car was running fine and then turned back on with a problem of this magnitude on these 3.1 liter engines? Help is greatly appreciated!