Hi Zak, Before going any further, what you are describing sounds like a fan clutch gone bad. At low speeds, and idle, the radiator depends on the fan to pull air through it. If the fan clutch is weak, it will not turn fast enough ( it will slip too much) and thus it will not cool the liquid in radiator . The fact that the car cools well at highway speeds indicates that the radiator is in good shape and not the culprit. Suggest you examine the fan clutch (with engine stopped...) ; it should have some resistance when trying to spin fan by hand. If it spins rather freely you probably need a new fan clutch. Order one from George Riehl.. John ----- Original Message ----- From: "David Zakarian" <arshog@xxxx> To: "Chrysler Club" <Chrysler300@xxxxxxxxxxxxxxx> Sent: Saturday, September 28, 2002 1:18 PM Subject: [Chrysler300] revisiting the over heating problem 300C > 300 seem to run fine on the freeway(temp gauge in the middle). Over heats in town(temp gauge at 3/4). In looking at the fan pulley on the 300C(overheating one) it seems to be about an inch larger in diameter than the fan pulley on my 300D(never overheats). Could the problem be this simple. Oh, the 300C(overheater) has a pulley with OD of 7 3/4 inches. The 300D(never overheats) has a fan pulley OD of 6 1/2 inches. Does anyone know what this measurement is supposed to be? > > Zak > > > [Non-text portions of this message have been removed] > > > > To send a message to this group, send an email to: > Chrysler300@xxxxxxxxxxxxxxx > > For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm > > To unsubscribe from this group, send an email to: > Chrysler300-unsubscribe@xxxxxxxxxxxxxxx > > > > Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/ > > >