To start things off, i've replaced both the upper and lower coolant hoses, flushed the system and replaced the thermostat with another 85 deg. C one. About 2 months ago i noticed that there was some coolant just below where the upper rad. hose connects to the rad. its not dribbling down or anything, but there is always a little green residue in the channel under that hose. i thought it was the hose, so i replaced both and planned on replacing the intake o-rings and gasket, but didn't have time (i got done at 2 in the morning and had to work the next day). anyways, its still showing up. has anyone had this before, and if so can it be fixed simply by having it re soldered, or should i just replace the radiator? i'm positive its not coming from the rad hose, that clamp is tightened down as much as i dare. thanks in advance!

 

A couple places to check. One is the nipple where the upper hose attachs. This can be soldered back up, if it is leaking, and the radiator is otherwise in good shape.
Another place to check is the low coolant sensor in the top of the radiator. I had a cracked sensor, and it would always have a very slight amount of coolant on the top of the rad. I replaced the sensor, which solved the issue. Even though the sensor was leaking slightly, I never lost any coolant.

 

or the rad cap?? should be replaced evry once ina while too...
Stu Aull
80 GS
Alaska