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Old 07-19-2017, 10:41 AM   #505
Steve Lai
Passed Driver's Ed
 
Drives: 2012 Golf GTI Mk6 4 Dr DSG
Join Date: May 2017
Location: Hong Kong
Posts: 11
Hey guys. Good to reach and read this thread. Would like to share some experience with u.
I got a water pump leakage last month in my '12 GTI DSG at 45K KM. My mechanic charged US $250 for labour. I asked for concurrent carbon clean up since the IM would be lifted up, but he refused and advised me to pour several cans of eng clearner instead.
I decided to DIY & hv the pump replaced, a full clean up of carbon built up in valves as well as a thorough injectors cleaning.
The carbon deposit is awful coz we seldom hv chance to pull the car over 3500 rpm in Hong Kong. I'm gratifying that mechanic refused the carbon cleaning job which has triggered me to try out the DIY - such a rewarding experience indeed, though it took me weeks of research and 2 days of engine bay battle but definitely worth it.
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Old 10-05-2017, 09:41 PM   #506
GTIKage
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Drives: 2010 Candy White DSG GTI
Join Date: May 2017
Location: Milwaukee
Posts: 7
If this is not the correct place, let me know; but I am going to start this from the "Other End", as it were.

I have a 2010 [Stock] GTI w/133,000 miles on it. (Bought used this past May) Drive it combo city/highway about 35 min each way to work & back. No obvious symptoms of carbon buildup issues yet. Car runs great. Almost can't tell it's running when at idle. Accelerates smoothly.

I have been noticing quite a bit of carbon buildup on the tailpipes. Comes off on your finger, so it's fresh. Does this indicate anything related to the original topic of this thread? I run 93 octane. Run Top Tier every 4th fill up, and try to do a carbon cleaning run every month or so. No oil burning at all. Looks clean, too. The tailpipe thing is puzzling. It's not a diesel...

I am told this is "normal" for a GTI. Is it really? (Price we pay for DI & the quality of the "gas" we buy?)

Could it be style of driving? I have noticed more of a tailpipe build-up since I started letting the DSG do all the heavy work of shifting, instead of using manual-mode. My overall mileage is up; but am I sabotaging myself for carbon buildup at the intake valves, and the tailpipe buildup is just an indication of that?

Or may this be related to the chain tensioner failure I had 3500 miles ago, and the bad chain cover seal that puked oil for quite a while before I caught it? Could that cause a carbon buildup at the tailpipes? I lost some 2 quarts of oil in ~800 miles before I caught the leak, but almost nothing ended up on the ground. (Not sure where it went, unless on the windscreen of the poor guy driving behind me?)

Anyway - I'm wondering what kind of an issue it might (or might not) be.

Thanks!
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"May the odds be ever in your favor"

2010 GTI, 2.0L CCTA TSI, DSG Gearbox
Owner since May 2017
Winner(?) of the Chain Tensioner Failure Lottery
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Old 10-05-2017, 10:43 PM   #507
hbrown0509
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Drives: 2013 VW GTI 4DR DSG
Join Date: Sep 2014
Location: Illinois
Posts: 766
Quote:
Originally Posted by GTIKage View Post
If this is not the correct place, let me know; but I am going to start this from the "Other End", as it were.

I have a 2010 [Stock] GTI w/133,000 miles on it. (Bought used this past May) Drive it combo city/highway about 35 min each way to work & back. No obvious symptoms of carbon buildup issues yet. Car runs great. Almost can't tell it's running when at idle. Accelerates smoothly.

I have been noticing quite a bit of carbon buildup on the tailpipes. Comes off on your finger, so it's fresh. Does this indicate anything related to the original topic of this thread? I run 93 octane. Run Top Tier every 4th fill up, and try to do a carbon cleaning run every month or so. No oil burning at all. Looks clean, too. The tailpipe thing is puzzling. It's not a diesel...

I am told this is "normal" for a GTI. Is it really? (Price we pay for DI & the quality of the "gas" we buy?)

Could it be style of driving? I have noticed more of a tailpipe build-up since I started letting the DSG do all the heavy work of shifting, instead of using manual-mode. My overall mileage is up; but am I sabotaging myself for carbon buildup at the intake valves, and the tailpipe buildup is just an indication of that?

Or may this be related to the chain tensioner failure I had 3500 miles ago, and the bad chain cover seal that puked oil for quite a while before I caught it? Could that cause a carbon buildup at the tailpipes? I lost some 2 quarts of oil in ~800 miles before I caught the leak, but almost nothing ended up on the ground. (Not sure where it went, unless on the windscreen of the poor guy driving behind me?)

Anyway - I'm wondering what kind of an issue it might (or might not) be.

Thanks!

The carbon build up is normal with DI engines. Hopefully at that mileage you already had at least one carbon cleaning. From what it seems that driving manual mode or “drive” mode carbon build up is inevitable. Catch cans and meth injection help slow it down.



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