3 water pumps.
Rusted (my fault for not oil spraying).
Finally scrapped when the heater core went.
Greatest car I ever owned. Dependable to the max, was never afraid to drive it anywhere. I put 350,000 Km's on it, and enjoyed everyone of them. Great highway car with great gas mileage, rode like a Cadillac.
I cried the day I took it to the wreckers (2005) because of a busted heater core that was not practical to replace, and I remember the wrecker telling me that all the Century's in his yard had intact motors and transmissions, and most were there because of frame and body rust. I still stare at the ones I see still see on the road and wonder if I could find another with 100,000 Km's on it; I would scoop it up in a minute.
If it is actually a '92 then it must have either the 3.3 V6, or the 2.5 four cyl. Unless maybe you're not in the US, then I can't comment. Anyway the 3.3 is a vastly better engine than the 3.1 v6.