The answer to 'my toilet repair smells bad' is that a foul odor coming from a recent toilet repair is typically caused by a problem with the wax ring seal or other plumbing issues. The most common causes are a broken or improperly installed wax ring, a leak in the toilet, or a clogged drain line. This can lead to sewage odors and bacteria buildup that create an unpleasant smell.
If you've recently repaired your toilet and are experiencing a bad smell, first check the wax ring seal. Make sure it is properly installed and creating a tight seal between the toilet and the drain pipe. You may need to replace the wax ring if it is cracked or dried out. Other potential causes could be a leak in the toilet tank or bowl, or a clogged drain line. These issues will require more extensive repairs that are best handled by a professional plumber.