[Sldrvr]

I know this is a pretty common problem with the compression fittings on the hose, but mine seems to be leaking where it threads into bottom of radiator. Is there a rubber o ring or something in there that I can replace? Or can I just use some thread tape to stop the small leak? I haven’t taken it apart yet so is there anything I need to careful of? I thank you in advance for your assitance.