The external fuel leak is the o-ring seal, doesn't affect anything
but fuel milage, and then only if it's quite large.
However, to replace the o-rings you must remove the valve holder, and
hence must replace the seals as they won't usually seal when re-
used. New springs won't hurt anything, and may correct minor timing
differences between cylinders if they have gotten short from use.
I personally prefer cars that don't drip, although I haven't had
many....
Peter
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