Chrysler Repair: Car Overheating/unexplained loss of coolant?, chrysler concord, white smoke

Question
Hello i am wondering if you can help me i own a Chrysler concord year is a 1997 and when it was June my car was overheating and i was driving on it for about 6 mins and i had my friend look at it and he fixed my top tubes that are connecting to the place where you put antifreeze and then now its march of 2010 and its doing it again and now i have no clue and the thing is the antifreeze was not in my driveway so i have really now clue what going on the car accept the antifreeze but it over heating and its like 5 degrees out and the car has about 210,000 miles on it but part of the engine is new so there is really not that many miles on the car i was wondering if you can help me
Thanks allot Kevin
Brandon

Answer
Hi Brandon,
If you are experiencing a loss of coolant from the system, but no evidence of fluid being lost to the ground, then it is possible that the coolant is being lost out the tail pipe (which you would notice as excessive white smoke coming from the pipe when you first start the engine), or it may be in the engine oil (which would appear to cloudy/milky in color. So observe for whether either of those things is present and let me know.
Roland
PS Sorry for the delay but your question just appeared in the 'pool' to which it had been referred. Please 'rate' my answer. Thanks