I've got a '90 Mazda Protege (173K miles) and it's still in
amazingly good condition, and runs like it did when one-
day old. It's been very well maintained all these years,
which is why I still have it. Here's the deal: I put in a
new after-market radiator last July; last month I noticed
a rather slow leak in the fins somewhere. This radiator
has a two-year warranty I think (still have the paperwork
somewhere), but I can't decide whether to just pull the
thing and take it back to collect on the warranty (assuming
they don't try to dance about something), or just pour a little
of the stop-leak stuff in and hope it seals it. It's been many
years since I used one of these products, and it seemed
at the time to gunk up the radiator some. What would
you guys do? Thanks!

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O.M.