One problem related to funny engine noise has been reported for the 1999 Chrysler Concorde. The most recently reported issues are listed below.
I saw a light bluish smoke come from my tailpipe once and then later in my drive the engine started making funny noises and then all of the sudden my car seized up and shut off. It restarted but then shut down again almost immediately. My engine is completely shot says my mechanic with me getting almost no compression. I was not overdue on my oil change and I had just refilled my oil 2 days previous.