I don't think Google would notice.
If I understand you correctly, you're deleting a URL and recreating it shortly thereafter. While technically Googlebot may notice your site returned a 404 for a URL it had found previously, Google loathes to remove 404 content until it's disappeared for an extended period. That's because websites are notoriously unreliable beasts and a 404 may really mean the site was temporarily offline, had a bug in its page generation code, whatever. I've noticed that redirects (301 Moved Permanently) are taken into account much faster than 404 (Not Found) or 401 (Gone).
So in short, if the before/after URL is identical and the "old" content is missing for only a day or two, I don't believe Google will care. You will, however, see errors in Google Webmaster Tools about the missing pages (it notes missing pages quickly).