do I need to replace the timing machine

I believe you have a timing chain so that is okay. If you have a timing belt it needs replacement as it deteriorates over time. Other things that go bad are fuel, brake fluid, auto transmission fluid and even oil. Fuel is especially unstable and turns to varnish quickly and causes fuekl sytem problems. Also check the intake tract to make sure nothing has nested there as mice and squirls are notorious for finding there way into intakes and even exhausts.

you have a timing chain for sure... i wouldnt worry about that.... what size engine is in this? if its a 3.5, there is a water pipe that goes to your oil filter adaptor, they like to rot, and go un noticed until its to late.... i would bring this to your local trust worthy mechanic, and have an inspection done... im sure you wont find anything to crazy wrong with it... these are good cars.