I bought a 03 Xterra with 33000 miles on the clock a month ago. And I swear I can smell some coolant after I shut the car down. It is not the strongest smell but it is there especially around the radiator and overflow. I have changed out the radiator cap and it is still there. There are no puddles under the car and I have been keeping my eye on the level of the over flow but since I have been on vacation the past 2 weeks I have been unable to tell if it is getting lower or not (I did top it off when I got the car). I brought it into the dealership this afternoon for something else and had them pressure test it and there are no leaks. But I do not know how much faith I have in the dealer as of yet .What else could it be. A bad gasket? The guy at the service desk told me just to keep my eye on the level. And give a call back if it is getting any lower. Maybe it is just my OCD but I swear I can smell coolant. I do have the extended warranty ( I am a sucker I know). so if it is a major problem hopefull that covers it.

Is there anything I should be looking for. And when is it best to check the level in the overflow warm or cold.

Thanks for the help

Matt