Hey viewers welcome back to underdog garage today we’re doing a carbon cleaning on a 2.0 liter TSI engine from a VW. So we have a 2013 Volkswagen GLI that we’re doing a intake manifold replacement on. because this is a car with 83,000 miles and it is a direct injection engine we have a serious case of carbon buildup in the intake runners. what we decided to do on this was a good old-fashioned scraping the sticky bits and getting that done and then doing a solvent soak and some brushing and you’ll see the details of that in the video and it worked out quite well for us.So come along with us and let’s see what we can get into. the first and most important step on this job that to make sure the intake valves are completely closed. So we’re getting no debris inside that cylinder. The next step in this process and then repeated for each cylinder was the dry scraping, and although it looks random I am starting at the valve stem and then working to the sides and the base of the valve, just taking the heavy chunks out first. Then in a second we’ll vacuum it out. It’s actually quite satisfying it’s sort of cruddy but I felt like a automotive dentist. The vacuum got all the debris out once it was loose. It worked great You can see this is round one. Progress on the left untouched on that right side of the runner. But keep in mind I did about three to four rounds on this before I ever went wet. Now I’m gonna brush out the intake ports with the brass brush.I wanted to try this as an experiment. I wasn’t really happy with the results, so I didn’t do it again on the other cylinders. It is pretty much ineffective One of the things to point out I did a lot of vacuuming in between it really helped keep things clean I’m using a product called Kreen. You’re probably familiar with it or have seen it really great effective stuff, and I’d do about 20-25 minutes soak on each round. It takes the stuff off. just like on the physical dry scraping, after this had soaked for 20-25 minutes I’d go in there with some different shape spring books, and just delicately go over the areas where I knew there was a buildup and just gently scrape on all the crud off. Next step is the nylon brush which I would use to scrape the especially the sidewalls on that intake runner. It work very effectively. Here I’m using a mighty vac and a larger reservoir to suck up all the dirty fluid that had been soaking in there. I had never used this method
before but it worked really great. You can get an idea of how nasty that is. Here’s what I look like after a round one scraping and round one soaking. I was pretty pleased with it. You can see that that was some really good results for a first soak and a first brush. As you can see we had some success with this. It was a great experience.One of the things that we learned is this the Kreen solvent was really really powerful. Very effective. I was familiar with it from other uses, but had never done it in something like this, so we wanted to try it. It worked out great so I’d give a total thumbs up to using the Kreen. One of the things that I wanted to note is on the first three cylinders I soaked at about 30-40 minutes each time, and did about two rounds and then I wanted to test and see how different would this be on an overnight soak. So on cylinder four I did an overnight soak and came back the next day, and there was really no difference at all, so it really doesn’t need a long soak.It’s just a matter of doing it repeatedly. I did about two or three soaks, well you see that in the video, but that worked out really really well for she’s nice and clean now so we’re ready to go back together. so guys thanks for watching this video we really appreciate you checking it out. like this video? Give it a thumbs up. If you have any questions thoughts or comments, or if you have a better way of doing the intake manifold carbon cleaning be sure to share it below so others can see it, and if you haven’t seen the other videos related to this project be sure to check out our video on the actual intake manifold replacement coming on and off, and be sure to check out our video on replacing the injector seals on our fuel injectors.for this engine. And as always be sure you subscribe because you don’t want to miss the next video, and see what kind of trouble we get ourselves into. So thanks again for watching and we’ll see you next time! .