i would change uim asap. i work in a shop and had to replace a motor in a 98 park avenue cause the uim leaked and bent the connecting rod on the middle rear cylinder.cost the customer 1900 to fix the car. with a rebuilt long block

The initial problem was the tb gasket. and as far as if its the original UIM, I will check. I did take a dental pick to the EGR area and it was very solid, no holes or cracks that I can see. regardless, $80-$100 for peace of mind is a no brainer. Also I know the car had DEX in it when I got it in 2000, I did flush it out and have used the Prestone in it since the first day I owned the car. I am willing to bet that I do need new LIM gaskets as well. Thanks for your input gents, you guys rock!

By mentioning that it had Dex.. you mean that you think you have sediment or goop in the bottom the rad?

well I put in a new radiator 3 months after I got the car so probably not. when I first bought the car and flushed the system, yeah there where chunks of snot in the cooloing system. I bought the car from the service station I used to work at part time. I also know the original owner of the car so thats how I knew it had DEX and I never trust anything that is labled extended life. Hell I use Royal Purple oil and change it every 2500 miles.