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      04-12-2012, 11:10 AM   #45
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I think we can all agree that BMW makes amazing automobiles. This is my third and once you drive them nothing else compares. Your hooked. But, this issue looks to be a flaw?
BMW should recognize this and make it a 35K service. 35/70/105 it just sucks to know that I will be doing this every 30k or so and it ain't cheap.
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      04-12-2012, 11:18 AM   #46
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How do you know you need your valves cleaned?

I have a buddy with an RS4, what he noticed was a slight lack of power and poor thottle response. I think in extreme cases you will have a rough idle too. My friend took apart his intake manifold and scraped the carbon off. He used SeaFoam to spray down the CB twice a day and let it soak into the valve buildup. Then he could scrape the softened CB off.
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      04-12-2012, 11:32 AM   #47
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I went by today and its not covered under CPO warranty, so they wanted $760 plus tax for the cleaning lol.
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      04-12-2012, 11:42 AM   #48
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That doesn't sound too bad from the Dealer. I'm gonna call a local shop....found this on the Net. Anyone use this before?

http://www.bgfindashop.com/bgservices/fuelair.htm
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      04-12-2012, 12:09 PM   #49
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I really don't see how this wouldn't be covered by CPO... it's not just a part of the powertrain... IT IS the powertrain!
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      04-12-2012, 12:57 PM   #50
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Quote:
Originally Posted by ken1137 View Post
That doesn't sound too bad from the Dealer. I'm gonna call a local shop....found this on the Net. Anyone use this before?

http://www.bgfindashop.com/bgservices/fuelair.htm
The locator shows my regular BMW dealership as being one of their locations... so I'm assuming the cleaning service they do is through BG anyway, lol. $750 sounds about right for the dealership doing the service. I also heard of $1000 for the service as well. Not cheap at all, and kind of annoying, considering that this is pretty much required if you want your engine to make it into the higher mileages.
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      04-12-2012, 01:41 PM   #51
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Quote:
Originally Posted by ken1137 View Post
That doesn't sound too bad from the Dealer. I'm gonna call a local shop....found this on the Net. Anyone use this before?

http://www.bgfindashop.com/bgservices/fuelair.htm
The price is ok, but I'm getting it done by another person who has done it before tomorrow morning. I'll post my honest impressions whenever I get back (he told me its about 6 hours of labor )
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      04-12-2012, 01:44 PM   #52
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The price is ok, but I'm getting it done by another person who has done it before tomorrow morning. I'll post my honest impressions whenever I get back (he told me its about 6 hours of labor )
I wonder how many of those labor hours are actually just spent waiting for a solvent to soak into the deposits before scraping it up...
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      04-12-2012, 01:48 PM   #53
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I wonder how many of those labor hours are actually just spent waiting for a solvent to soak into the deposits before scraping it up...
Yeah no doubt, but I can't argue with his price ($500) compared to the dealers.
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      04-12-2012, 04:20 PM   #54
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Originally Posted by RnmEvo9 View Post
I went by today and its not covered under CPO warranty, so they wanted $760 plus tax for the cleaning lol.
My dealer wanted $300 for a spray to clean it out... and the carbon made the cars rpms act very oddly.

When my HPFP went for the 2nd time they also said they had to clean the carbon out. They said out of warranty it would have cost $4300 also the fuel injectors went.. This was at 30 or 32k miles.
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      04-12-2012, 04:41 PM   #55
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Quote:
Originally Posted by kja325ci View Post
I think we can all agree that BMW makes amazing automobiles. This is my third and once you drive them nothing else compares. Your hooked. But, this issue looks to be a flaw?
BMW should recognize this and make it a 35K service. 35/70/105 it just sucks to know that I will be doing this every 30k or so and it ain't cheap.
+1
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      04-12-2012, 04:43 PM   #56
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Quote:
Originally Posted by NewYearsBoy View Post
My dealer wanted $300 for a spray to clean it out... and the carbon made the cars rpms act very oddly.
I wonder how effective this so called spray is?
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      04-12-2012, 04:46 PM   #57
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I have a friend with an RS4. He took his manifold off and placed it in a kiddie bath full of seafoam for 3 days. After that the carbon came off with a plastic spoon.

Its a problem with all DI cars...and its something that I really think I need to do with 75K on the clock.
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      04-12-2012, 05:15 PM   #58
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Yes, I would highly recommend a thorough cleaning, especially with mine being so noticeable after only 20k...
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      04-12-2012, 05:18 PM   #59
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Might even take it to the track to see if there are any improvements in that aspect, but I doubt it. For the record, I have trapped 117mph in the 1/4 as of lately before the cleaning. I guess we might see what it does after the cleaning.
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      04-12-2012, 06:13 PM   #60
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I did the Seafoam treatment at 20k miles just before installing a BMS catch can. After the initial smoke and sputtering, the car did seem to run a bit smoother. Took about 30 miles of highway mileage for the CEL to clear itself. After the CEL cleared, i checked the codes and notice that the ECU logged a misfire on two or three cylinders. I only mention that in case you don't have the tools to clear the codes before taking it in for dealer service.

When installing the catch can I did notice oil lining the OEM tube that routes the PCV gases to the intake. While I was at it, I dropped the intercooler and noticed a small amount of oil pooled in the bottom of the core... About a teaspoon. I flushed the intercooler with diesel, then hot soapy water and let it dry before reinstalling. At 23K miles, I checked both the catch can and intercooler. The catch can was dry, but the intercooler had a few drops of oil in the bottom. I'm not positive, but I suspect some of the oil that makes its way through the system to the intake (and causes the carbon build-up) comes from oil blowing by the turbo seals. I'm not suggesting that the catch can doesn't work, I just think the PCV gases are not the only thing contributing to the carbon build-up.
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      04-12-2012, 07:25 PM   #61
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Quote:
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I suspect some of the oil that makes its way through the system to the intake (and causes the carbon build-up) comes from oil blowing by the turbo seals. I'm not suggesting that the catch can doesn't work, I just think the PCV gases are not the only thing contributing to the carbon build-up.
+1....I think you are correct based on my last results so far with the OCC.
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      04-12-2012, 11:32 PM   #62
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There is an up side, I had mine cleaned at 45K and my car went from stuttering at every stop to a perfect idle. My gas mileage went up also. Seems to cure a lot of problems

BTW, media blaster with walnut shells does a great job
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      04-12-2012, 11:34 PM   #63
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my experience

http://www.e90post.com/forums/showthread.php?p=9429280
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      04-13-2012, 03:59 AM   #64
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Quote:
Originally Posted by KingOfJericho View Post
Yes, I would highly recommend a thorough cleaning, especially with mine being so noticeable after only 20k...
Im really afraid to open mine up at 75K and see the damage
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      04-13-2012, 07:06 AM   #65
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Aside from the expense is there any speculation of a long term helping solution (not fix as that won't happen) aside from a catch can and meth which is still debatable of how much they help. Possibly a set of polished SS vales, polished ports (since it's DI the ill affects of truly polishing might help) and then on top of that maybe soaking the valves and ports in a recommended snake oil lubricant that adheres to metal.
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      04-13-2012, 07:59 AM   #66
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Sorry for being a n54 noob....

What are the symptoms of carbon build up?
I searched but cant find an answer
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