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    1. Member
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      Oct 1st, 2006
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      2009 CC Lux 3.6 4motion
      03-18-2011 09:08 AM #1
      It looks like we're in the same boat as the 2.0 TSI/FSI guys. Massive intake sludge buildup.

      A fellow vortex'er who's 3.6 had the dreaded oil pump bolt issue, out of warranty btw, had his mechanic tear down his engine.... The mechanic noted to insane amount of carbon/sludge on his intake ports and valves. This is from a 2007 with 71k miles. 5000mi OCI.





      Now, I've torn down more than a few engines, some very high miles. I've never seen anything this bad. Browsing through a bunch of TSI/FSI threads on the issue it seems the best fix is a catch can. To my knowledge, no one makes one for the 3.6? Does anyone have any insight on how we could install a catch can? I don't think Seafoam is going to fix this....

    2. 03-18-2011 07:12 PM #2
      ALL FSI engines will do this as the fuel is direct cylinder not port injection so the fuel does not mix with the air/oil vapour to stop it collecting on the inlet/exhaust ports.

    3. 09-11-2012 12:42 AM #3
      that is not a lot of carbon. that looks about normal for the miles

    4. Member vwmaniac16vr6's Avatar
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      Nov 17th, 2004
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      North-west NJ 07838
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      09-12-2012 04:35 PM #4
      I think it has to do with the extra degrees of exhaust vvt overlap that takes place of the egr function. The is upto 44 degrees of movement in the 3.6 as compared to the r32 or 2.8 24v which has 22 degrees. I was thinking of swapping the vvt ring from the older motor and retuning the exhaust cam when i write my flash so i can eliminate the extra overlap used for exhaust recirculation in the 3.6 motor.

    5. Geriatric Member need_a_VR6's Avatar
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      May 19th, 1999
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      Oxford, PA
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      15 Jetta 92 Corrado VR6
      09-13-2012 09:29 PM #5
      You would need to use the matching cam as the centers are ground different between them.

      Saikou Michi might make you something if you ask nice. However the 3.6 sees full vacuum from the manifold and the can would need to be rated for that as well.
      -Paul
      1992 Corrado - ALL MOTOR Drag Project
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning

    6. Member
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      Jul 20th, 2014
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      Fishkill, NY
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      2014 Passat TDI SEL > 2017 V6 Passat SEL
      03-08-2017 06:39 AM #6
      Does anyone treat them periodically ?

      I only have 600 miles on mine, but figured I'd try some preventive treatment throughout. GDI seems like
      a manufacturers plan with the valves.

      I got CRC 05319 Intake Valve Cleaner and Liqui Moly 2033 Pro-Line Intake System Purge at Amazon.

      Thinking of treatment at first oil change and every other after ?

    7. Member G60ING's Avatar
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      Jun 27th, 2000
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      Panhandle FL
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      03-19-2017 07:58 PM #7
      Once I get my swap finished I plan to make a plexiglass flange/adapter that will allow me to use the BMW walnut blaster nozzle.

      I thought about doing water meth injection to deal with the carbon buildup but it doesn't stop or undo the buildup.

    8. Geriatric Member need_a_VR6's Avatar
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      15 Jetta 92 Corrado VR6
      03-20-2017 09:51 AM #8
      I would think WMI would do it if it's ON enough and higher methanol content.
      -Paul
      1992 Corrado - ALL MOTOR Drag Project
      1995 GTI VR6 - Retired - 12.90@106 R32 power - 12.833@106 12v power
      KPTuned - Official MegaSquirt: Sales - Repair - Installation - Tuning

    9. Angry Turtle Administrator nater's Avatar
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      Apr 10th, 2000
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      2008 3.6L Passat 4Mo, 98 O2M 3.0L VRT, '04 .:R32, 2010 Routan
      03-20-2017 10:12 AM #9
      This is an easy fix:
      1) Service Position
      2) Remove manifolds
      3) Walnut blast!!!
      Worked like a charm for me. Have pics and a vid around here somewhere.


      Sent from my iPhone using Tapatalk

    10. Member
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      Jul 20th, 2014
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      Fishkill, NY
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      2014 Passat TDI SEL > 2017 V6 Passat SEL
      03-21-2017 06:45 AM #10
      With less than 1000 miles still, I was hoping for a preventive maintenance approach before walnut shells.

    11. Member G60ING's Avatar
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      03-21-2017 07:19 AM #11
      Quote Originally Posted by Mike_Fav View Post
      With less than 1000 miles still, I was hoping for a preventive maintenance approach before walnut shells.
      Water meth injection

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