07-25-2016, 01:10 PM
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- Audi A6 C6 How to Remove Intake Manifold and Clean Carbon Deposits Off Valves<br>Step by step instructions for do-it-yourself repairs.
3.2L FSI, Can Seafoam clean carbon deposit on intake valve?
10-14-2009, 06:39 PM
#15
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I use this for all my car, though non-FSI. Anyone tried it yet?
http://www.stp.com/fuel_cfsc.php
The results are pretty good IMO.
http://www.stp.com/fuel_cfsc.php
The results are pretty good IMO.
10-14-2009, 07:29 PM
#16
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Doesn't work in our cars because the fuel never hits the back of our intake valves. That is the problem. There is no fuel that lubricates the valves so you have carbon deposits form quicker than normal.
09-25-2019, 06:01 AM
#18
One nitpick. The fuel isn't just lubricating. It's dissolving pcv oil from the crank case.
Last edited by jasontaylor7; 09-25-2019 at 06:10 AM.
10-13-2019, 09:33 PM
#19
AudiWorld Member
I have used seafoam on many vehicles, including my 3.2 and 3.0T A6s. I feel like the seafoam did little if nothing for my intake valves. What I have found to work surprisingly well is CRCs GDI valve cleaner.
I manually cleaned my valves in the beginning of this year, and used seafoam. The deposits were hard after sitting in seafoam all night. That's when I stopped using seafoam.
After hours of searching, I came across CRCs product and decided to try it. I felt like the machine ran better after application, but that could have just been optimism. Fast forward to about 3 weeks ago. I removed my S/C again to inspect and modify my PVC and clean my valves. The valves look about the same since I cleaned them the first time. This time, instead of seafoam, I sprayed them with the CRC. Unlike the seafoam, which didn't loosen the deposits at all, the CRC had my carbon coming off like butter. I let the valves soak over night, and managed to get almost all of the deposits removed.
I manually cleaned my valves in the beginning of this year, and used seafoam. The deposits were hard after sitting in seafoam all night. That's when I stopped using seafoam.
After hours of searching, I came across CRCs product and decided to try it. I felt like the machine ran better after application, but that could have just been optimism. Fast forward to about 3 weeks ago. I removed my S/C again to inspect and modify my PVC and clean my valves. The valves look about the same since I cleaned them the first time. This time, instead of seafoam, I sprayed them with the CRC. Unlike the seafoam, which didn't loosen the deposits at all, the CRC had my carbon coming off like butter. I let the valves soak over night, and managed to get almost all of the deposits removed.
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jasontaylor7 (10-14-2019)
01-06-2020, 10:57 AM
#20
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I have a 2011 A6 3.0 SC as well. Where did you spray the cleaner into? Lot of vacuum lines and not quite sure where to inject. Trying to avoid hitting the MAF/MAP.
Also did you ever place the fluid into the fuel tank to see if that would increase the potential to not only clean the valves, but the entire fuel line system and injectors?
Wondering if this also helps clean out the air/oil separator area as its a prime suspect to oil consumption. Please advise as removing the entire SC system is the only documented way to clean the valves and replace the A/O separator. Thanks....
Also did you ever place the fluid into the fuel tank to see if that would increase the potential to not only clean the valves, but the entire fuel line system and injectors?
Wondering if this also helps clean out the air/oil separator area as its a prime suspect to oil consumption. Please advise as removing the entire SC system is the only documented way to clean the valves and replace the A/O separator. Thanks....