Mike Rapoport wrote:

Mike Busch has an article on Avweb where he discusses this topic. His
conclusion seems to be to repair/replace only the affected cylinder. If you
repair the cylinder for $500, it only has to last a short while to be more
cost effective than the other options. The conclusion seems to be based on
the assumption that the failure of one cylinder does not indicate that the
others are about to fail..

I have had cylinder problems too. Fix the bad one and fly.