Since you replaced stuff on it, did the hoses get replaced too? Step one is to check the hoses, why? Because i just had this problem on mine. Bought it and about a month later i was slowly bleeding coolant somewhere and i could smell it burning off the exhaust as it got blown around.
Turns out the hoses got replaced along with the radiator and it hadnt been driven much since. So after a few cycles of getting up to temp and cooling off the hose clamps needed tightening again. I tightened them down when they were cold and then took a nice long drive and got everything up to temp and tightened them a bit more. Topped off to the cold line and after another day of driving to burn off the remainder of coolant that was splashed here and there no more smell and no more loss.
If you still have the factory type spring loaded clamps on the hoses i would try replacing them with some real hose clamps, tighten them down but not like gorilla tight, dont go crazy on them. Then drive it for a bit, with expansion and contraction you will need to snug them back down a bit once everything gets hot again.
And you might even want to just replace the hoses too!
As for the other comments above i agree, make sure your oil looks good, not frothy or looking like chocolate milk up in the head, pull the fill cap off and look down in with a flashlight if nothing else and make sure everything looks normal. But since you getting coolant on the ground you just have an annoying external leak.
Hoses, radiator, thermostat housing, water pump... Since the water pump was replaced double check that, sometimes you can get it where they didnt torque the bolts right and over time with expansion and contraction a leak develops.
