i suspect there is something that is not working 100%, but is not a serious problem as yet. what year is this car? and a note about where you live would help as well so we have an idea about driving conditions.

a good pressure wash from behind of the radiator might do the trick. but really until it gets a little worse it may be hard to pin it down.

tom w

__________________
[SIGPIC] Diesel loving autocrossing grandpa Architect. 08 Dodge 3/4 ton with Cummins & six speed; I have had about 35 benzes. I have a 39 Studebaker Coupe Express pickup in which I have had installed a 617 turbo and a five speed manual.[SIGPIC]

..I also have a 427 Cobra replica with an aluminum chassis.