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Old Mar 7th, 2014, 03:23 AM
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check engine light 2008s automatic 48k miles

The check engine light came on today and I took it to my MINI dealer. Dealer says the intake valves are not seating because of carbon buildup. They suggest blasting with walnut shells. I found a gas additive that cleans injectors and intake valves. The dealer says they don't think it will hurt, but not help. The car seems to run fine. Any comments? Dealer says $1100 to clean things up.
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Old Mar 7th, 2014, 07:50 AM
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DIY Walnut Blasting

Hey what's up........
Don't know where your at in the US but I hope this helps. Scroll down on "Mini2" home page to "Community Discussions" look under the NORTH EAST section semi close to the top there are two guys that are certified techs and do the walnut blast for $350.00.
JPAP Motorsports, (718) 440~7666 there names are Austin & James out of East Northport NY
You will see there Posting "Walnut Blasting"
After you get done blasting you may wanna do as I do buy some Royal Purple injector cleaner that should be used every 3rd tank or so. Keeps ya clean and even gives an octane boost. Cost is about 15~20.00. If you can't get to a walnut blaster the Royal Purple will clean you up to some extent and you will run better but will not be cured. The one can wonders we call them IE...... Gumout etc etc you see are not worth much at all and weak! Best of luck Bro
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Old Mar 7th, 2014, 12:03 PM
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DIY Sorry, Boo Boo On Section......

YES IT'S UNDER "COMMUNITY DICUSSIONS" THEN LOOK DOWN TO "USA" AND CLICK ON "New York, New England Region" for JPAP Mototrsports.

Guess I was a little hazy that early in the morning!
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Old Mar 7th, 2014, 09:37 PM
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NY is quite a few miles from where I am. What I am really concerned about is that the direct injection used is a new technology. Is this something that is inherit with it? The additive I am trying is supposed to clean intake valves.

Cleaning with walnut shell fragments is been around for some time, but the need went away when lead was taken out of gas back in the 1950s in the USA.
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Old Mar 7th, 2014, 10:18 PM
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Carbon build up is common on N14 engine ...

Gas additives to clean intake valves don't work with direct injection engines because gas is injected directly into the combustion chamber.

Dealer quote of $1100 for decoking is outrageous.

Suggest asking over on NorthAmericanMotoring for someone to in your area who does walnut blasting.
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