Finally found the leak i've been battling with. Both driver/passenger have fluid around the same area. This isn't a drain bolt I believe, I couldn't find anything while doing research. Any ideas? Should I try to tighten? Every day it goes from full to low fill line (checked when cold) (driving less than 10 miles a day) so it's leaking a decent amount. It looks like the original rad (240k mi). Any tips or should I replace?

 

Realistly you should replace it.....Why dink around?......Use the red Zerex coolant

 

+1 (if the car not for sale)

 

Tightening that nut will not help, it is holding the condenser (the tube above is the dryer), +2, new rad time.

 

yup! definitely sounds like the radiator has finally met its match so to speak and finally bit the dust. 240,000 miles is definitely a lot of use for a original radiator so yea its time for a new one.