Welcome Gypsyhawkeye1 - what's your first name?
Rare to hear of cases of polio these days - I don't know much about it other than what I heard growing up in the 50's (of the previous century), but I hope it can be managed well with modern medicine. Maybe you can educate us.
On the car, be aware that the 2.7 can be a good engine (I have one that has over 240k miles on it) - it has a timing chain (vs. a rubber timing belt), which is a good thing. But they are known for failing in the 60 to 80 kmile range. If they make it thru that, generally, they do OK. Not sure if it's luck of the draw, maintenance, type of driving (city/stop-and-go vs. mostly good hiway miles), or some combination of those.
It is *very* important to change the oil regularly at no more than 3500 mile intervals (filter each time or every other time) - recommend Purolator Pure One, Mopar, NAPA, or Mobil one) with that engine. Most engines are somewhat tolerant of poor oil maintenance - this one is not. Many would recommend using a good synthetic oil - if you're going to do that, do it now. Personally, I just keep 8 ozs. of Marvel Mystery Oil in the crankcase as a sludge preventative, and use Castrol GTX, and apparently it has done no harm.
Also, change the coolant. 99's came from the factory with traditional green coolant in it - depending on maintenance habits of the previous owner, it could still have the original stuff in it. Have it flushed real good and put G-05 coolant in it (Mopar brand from Chrysler dealer, Zerex G-05 aftermarket, or Motorcraft "Premium Gold" from Ford dealer - Mopar brand is reddish color, the Zerex and Motorcraft are yellow). The final mix should be 50/50 with distilled water (from a grocery store).
The water pump is driven by the timing chain, so is buried in the front of the motor. The water pump going bad and either leaking coolant into the crankcase or locking up and throwing the timing chain are the main failure modes - when that happens, usually that is it for the engine. If that happens, most people by a used 3.2 or 3.5 engine from a reliable source.
'98 LXi - Later Concorde gages (black w/ chrome rings)/'99 LX - LHS gages (white) - HIR bulbs
Last edited by peva; 12-31-2010 at 10:34 AM.