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      07-02-2013, 12:54 PM   #31
Hoooper
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Drives: 335D
Join Date: Jun 2013
Location: Petaluma, CA

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if you actually have carbon buildup as the problem and its causing limp mode, no amount of additives or oil changes will fix it. You have to get it cleaned up. $5,500 is an outrageous price though, for that amount you could find an indi who isnt super busy to tear down the top end and clean it out with a dental pick and toothbrushes. I would think a real shop could do it in a day, two if its their first time. Two days labor and $750 for a manifold (assuming they cant/wont clean it) should get you out for under $3k and IMO two full days is a day and a couple hours too long for "professionals" to do this. A brand new cylinder head online goes for under $2500 so for $5500 you better be getting a completely brand new top end