I have 91 Accord. I find small amount of coolant on top of the radiator fan housing from time to time. I can't find leak any where. I replaced radiator cap already. Can it be the reservoir hose clamp?

thanks

 

check at the top of the radiator when the cars warm for small cracks lengthwise across the top....thats were mine were

 

Check the joint/seam between the upper tank and the radiator as well.