07-13-2014, 03:59 PM | #1 |
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Carbon Build Up Question.
Will the F8X be susceptible to carbon build-up on the intake?
Will owners be actively carrying out Walnut Blasting as a preventative maintenance solution? I guess this would really only apply to owners who plan on keeping the car for a longer term. Thanks |
07-13-2014, 04:03 PM | #2 |
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Most of the time if you drive the car like you stole it, carbon build-up will be a non-issue.
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07-13-2014, 04:07 PM | #3 | |
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I guess time will tell, I don't track (except Go Carts), but I have days where I am on it!! |
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07-13-2014, 05:18 PM | #4 | |
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I've heard every wive's tale about carbon buildup: drive it like you stole it, frequent oil changes, only use high tier gas, rub two chicken bones together over your hood every week, etc. Unfortunately, carbon buildup is a price you pay for DI. Now how bad is it going to be? We'll just have to wait and see until we see some S55s start to hit the 40k mile mark. |
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07-13-2014, 05:20 PM | #5 | |
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07-13-2014, 05:23 PM | #6 |
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Speaking of, I need to get my valves cleaned but my local dealer quoted me $1400
Another dealer quoted me half that which is still high. I don't understand how one dealer is 2x the price of the other. You would think it would be a standard price. Time to find an indy shop that will do it. |
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07-13-2014, 08:16 PM | #7 | |
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07-13-2014, 08:27 PM | #8 | ||
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08-07-2014, 03:54 AM | #12 |
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I had this after 4 years on a October 2008 335 coupé. first the fuel injection pump caused problems every 10k miles, until they eventually changed the parts after the fifth occurence. then 1 year later they tell me that there's a massive carbon buildup and they had to replace half of the engine. my luck I was under extended warranty, the parts alone were 11k swiss francs... sold it a couple of months later, to order the M4
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08-07-2014, 05:28 AM | #13 | |
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However, a,street car, no matter how hard it is driven does not see these kind of operating conditions. |
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08-07-2014, 09:59 AM | #14 | |
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You can't compare a race engine and a street engine. A street DI engine is going to have carbon buildup. |
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11-11-2017, 12:07 AM | #17 |
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I posted this in another thread. No build up seen at 60k miles. That was back in May.
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02-23-2018, 02:38 PM | #19 |
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good info
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02-25-2018, 12:17 PM | #20 |
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M235i - 2014 89000km's. No issues with the carbonization of the intake valves. My mechanic is not seeing a major issue at all with any M engines with respect to this issue. Certainly not with N55 powered M2 I have or this M235i that I have and do love. The cam area was as clean as the intake valves. NO cleaning was warranted. BMW did a good job with valve timing and EGR per my dealer mechanic.
The attachment is from a recent valve box/cover replacement. At this time the intake valves were observed/analyzed. Very pleased! |
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02-25-2018, 05:15 PM | #21 | |
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02-25-2018, 11:43 PM | #22 |
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The valves were clean as noted in my post. I change at 15000km's. The M235i is driven daily as my M2 is as well. Short and longer durations, city etc. My mechanic is not dealing carbon as an issue with N55 overall.
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