Hi folks, I recently "fixed" my radiator neck on my 2006 S60R using this excellent writeup by Mikele82: https://www.matthewsvolvosite.com/fo...ic.php?t=90098

It worked for a while, but now I'm getting a tiny leak that appears to be coming from between the copper pipe and the original radiator neck.

I went back in this weekend and applied more high-temp JBWeld to the inside of the radiator neck but I did NOT pull the copper pipe out and try to re-apply the epoxy the the outside of it (and the inside of the neck) - my thinking is that the copper pipe is essentially in there permanently at this point and pulling it would probably be impossible, or cause further damage. Anyway - after re-gooping the interior of the neck, the leak seemed to go away, but now it's back again only a couple days later. I'm debating whether I should try again or use some K-Seal stop-leak additive. I've done a LOT of reading on stop-leak additives in general, and K-Seal in particular, and there are a lot of different messages.

So I'd like to hear your opinions. I'm broke - that's why I'm not just replacing the radiator. My thought is to maybe just add like a quarter of a bottle of the K-Seal and see what happens? I'm concerned about all the costly side effects I've read about but it seems like a lot of people have had pretty good experiences with K-Seal too. So how about you? Anyone who's had experience, can you speak to this dillema?

Thanks in advance - I look forward to hearing your thoughts.

- Mahalo,
Ethan