Whilst trying to remove the temperature guage sensor on my 95 4l YJ Wrangler (its the one at the top rear of the engine by the firewall) to remove an airlock, it has snapped flush with the engine, damn rust. Is it best to try to get it out with stud extractors or drill and tap. If drill and tap is the answer what size is the thread as I dont want too big a hole.
Any advise would be appreciated very much
many thanks for looking