Audi A5 Forum & Audi S5 Forum banner

carbon buildup

  1. A5 General Q&A
  2. A5 & S5 Topics
    Hey guys I have a question, you may have the correct answer. Does catch cans stop all oil from entering back to the valves? What percentage of oil is not caught and does hard driving increase the odds of oil bypassing the catch can system. Do you know any catch can that can stop 100% of oil from...
  3. A5 General Q&A
    Hey guys, I removed first spark plug driver side. Looked inside with a Boroscope. Can anyone tell me how to determine if you need a carbon buildup. I attached pictures. Car has 72k just got it. Don't have any of information on previous carbon cleaning. Installed a catch can already to help
  4. S5 General Q&A
    Hello, I am just about to pull the trigger on a 2008 S5. My one concern is the carbon build up I've been reading about on this forum and elsewhere. I fully plan on supercharing the car. So my question is, what kind of impact will forced induction have on the carbon build up? Any feedback from...
  5. S5 General Q&A
    Hey everybody. Has anyone had any issues with cylinders misfiring? I'm not too mechanical so I apologize, but my S5 has been in the shop three times with an annoying hesitation on start up (after I start going it stops). The dealer determined that there was excessive carbon build up (as many...