I've got a 90 buick lesabre with 150k on it. I have heard stories of timing chain problems with these vehicles in that the cam sprocket was made of nylon and was prone to having the teeth strip off as well as problems with the tensioner wearing down to the point where it places almost no tension on the chain. I was told that this applied to the lesabres up until '89 that had the VIN 3 engine. I've got the VIN C 3800 in mine and was wondering if it has the same problem. Also, what symtoms and drivability problems would i have if my chain was slackening up and going bad?