I'll try and make this short. For some time now I have noticed a slight coolant scent but have let it to until this past weekend. I drained my coolant replaced the upper, lower, bypass, and heater hose in an attempt to located the leak. Also I changed the clamps to the screw type. AFter refilling and driving around for a while I still noticed a slight coolant smell but I figured it was the burn off I had spilled. So this morning I check the resvoir and about 1/4 from the max line is missing. No visible leaks in the bay or on the ground. I checked the oil so its not mixing with it. No smoking during driving. So at this point I am stumped. Oh there are no leaks from the heater core that I can see or feel on the passenger side. DOes anyone know it the OEM radiator had the HONDA stamp on the top of the radiator? Mine has the stamp which I assume maybe the original radiator in which case needs to be replaced. IF you buy an radiator from the dealer will there be a HONDA stamp on it? THe only options I have now are to pressure test and maybe replace the cap.

EDIT: I see a small leak under the upper radiator inlet, which is where the upper hose connects to. This leak was never here before I replaced the hose. Maybe I caused the leak? Is it possible to over tighten the clamp so the inlet cracks? THis sucks. I feel like I'm creating more problems than I am solving. And no this isnt my first time working on a car. ANy constructive comments or advice is appreciated. THanks

 

The radiator on my GSR started to leak where the top plastic tank is crimped to the core. There was a coolant smell and small leaks that were hard to find the source of till I wised up to the crimp seal.
Replaced it with an all-metal Modine unit.
I think the original was a Showa maybe?

 

Don't sweat it man, OEM rads get top tank cracks all the time. Stupid plastic top tanks. If you made it past 80k with the OG, then consider yourself lucky.