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04-18-2012, 09:06 AM | #89 | |
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04-18-2012, 09:24 AM | #90 |
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>>good quality gas<<
As in every single gas station in the US that has their gas checked by the DOT once a year? But yes you are right, at the moment all the dealer and BMW will tell you is that and charge you for a cleaning. But however if a good number of cars are found to have such a buildup of carbon that they are not passing inspection due to emissions faults. Maybe there will be a class action suit. But even then you won't get anything. Till then run Chevron Techron cleaner, redline the car after it's warmed up every now and again and cross your fingers. |
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04-18-2012, 09:26 AM | #91 | |
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The ones with proper additives like techron (spelling?) and etc. |
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04-18-2012, 11:39 AM | #92 |
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I have a friend with 335i N54 and he cleaned his not long ago. He said it was bad but pretty simple to clean yourself. He had 90k+ miles on his before it got bad enough for him to bother cleaning it. Once you clean it everything will look and run brand new again. Just seems like one of those things that if you want your vehicle to run like new for as long as possible you will clean it yourself or pay a dealer to do it.
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04-18-2012, 01:40 PM | #93 |
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Smoking exhaust a symptom?
I've noticed a lot of blue smoke on cold starts recently just for the first "puff". It's definitely smoke as it lingers in the air. Could this be carbon build up? I have hit 37k miles. Seems like it's about that time
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04-18-2012, 02:40 PM | #94 |
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I saw one mention of it and would like a bit of clarification....this only effects 135's and not 128's? The only response I saw was that this site was heavily 135 biased.
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04-18-2012, 03:56 PM | #95 |
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Regarding seafoam, is it something that will help me as a 128 owner, and at 20,080 on the clock is it a preventive maintenance item I should consider doing? I drive 12-14 miles to from work, lots of start/stop, but do air her out on the weekends.
Also, are there any consequences to the use (proper or improper) of seafoam on the 128i engine? |
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04-18-2012, 04:01 PM | #96 |
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Seafoam is safe, so is mavins mystery oil and hell even Chevron Techron. What you should NOT USE is Burkible 2+2.
That eats away at plastics. But as others put it, hit Costco, pick up a case of Chevron techron and run it every other tank of gass and cross your fingers. |
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04-18-2012, 05:23 PM | #97 |
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Yes.. You are correct... 128 in naturally aspirated, with port fuel injection. Not affected by carbon buildup on the ports.
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04-18-2012, 05:42 PM | #98 |
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Thanks Lefty, as you can see from my signature I keep my cars for a long time so longevity is very important. That even with the modest "128i" I'm still looking at a @45hp increase over our current 325. I'm a firm believer in lower hp does not mean less fun
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04-19-2012, 06:36 AM | #99 | |
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This is the symptom of a bad valve stem seal. When the car is turned off, the oil sitting in the top end of the engine slowly leaks through the seal into the combustion camber. When the car is first started, the oil is burnt off resulting in the blue smoke. This can last a couple seconds or longer, but generally stops once the initial oil is burnt off. Unlike bad rings, you seldom (if ever) see smoke when driving or once the cats are warmed up. Bad valve stem seals are generally the result of black sludge building up in the oil around the seals (not to be confused with carbon build up on the back of the valves). The sludge starves the seals of lubrication and they "dry up" for lack of a better word. Sludge is the result of long oil change intervals, short trips where the oil does not reach optimal temp, and excessive idling seen in cabs and police cars. Removing the sludge will often allow the seals to swell and the problem will go away. While several people mention the use of Seafoam for cleaning carbon, it is also very good at melting sludge in the oil. Put a third of a can in your oil about 200 miles before your next oil change. During this time, avoid aggressive driving since Seafoam will lower the viscosity of your oil and you don't want to hurt your turbo bearings. If you do this each time you change your oil, I'd be willing to bet the problem will go away after two or three oil changes. You can do back to back oil changes with the addition of Seafoam to accelerate the cleaning, but I wouldn't recommend leaving the Seafoam in your engine for over 200 miles. Good luck. |
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04-19-2012, 07:21 AM | #100 |
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Mines an 08 with 13k miles on it, just bought it. I plan on putting 20k highway miles on it a year. Will be interesting to see how it does in 2 years.
Think I might start doing the fuel system cleaner every 7000 miles or so. |
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04-19-2012, 07:25 AM | #101 |
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Highway driving will elongate the cleaning intervals quite a bit. It's the cars taking short trips without reaching full operating temps where the buildup is most dramatic.
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04-19-2012, 07:31 AM | #102 |
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And (I bet) the long oil change intervals that BMW suggests. This is one more reason to change one's oil sooner than BMW says too. Old thin oil(blow by and thru the PCV) is more likely to end up on your hot intake valves.
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04-19-2012, 08:43 AM | #103 | |
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Thanks for the clear explanation. Given that I have had the oil changed at the recommended BMW intervals, I'm guessing BMW aren't going to admit this or address it under warranty. Dan |
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04-19-2012, 02:26 PM | #104 |
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My car saw the Highway constantly and carbon build up was horrible.. In FL you rarely go under 45 or 50..
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04-19-2012, 03:27 PM | #105 |
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Hi everyone!
im Eli from Israel, a new 135i N55 owner here, probably the only one in Israel with the N55 not counting the 3's and 5's here, anyway i have been reading about what i am about to face in future services and about the carbon buildup wanted to know if this kind of treatment works for us aswell as the audi is D.I aswell i thought it could be the same method instead of sandblasting the intake. what do you guys say? |
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04-19-2012, 06:20 PM | #106 |
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my turbos were replaced a year ago at 46,000 miles under warranty. I'm at 56,000 miles now. (replaced due to the wastegate making a ticking noise)
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04-19-2012, 09:14 PM | #107 | |
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Cruising about 55mph, then dropping a couple of gears and going WFO, that can help burn off some deposits and indicate build up. But, you have to be careful in the interpretation of any smoke there as well cause turbo engines tend to have some "smoke" when going WFO. Many turbo engines run a rich a/f ratio during wide open throttle runs. The rich mixture helps insure plenty of fuel and no lean condition while the boost is at maximum. Cold start blue smoke may indicate excessive oil seepage into the combustion chamber after the engine is shut off. If there is a leak it's probably also leaking while running. Check your spark plugs and look for oily residue or burnt black deposits. Plug condition can tell you things about your engine and how it's running. There are charts and pictures you can find on the web. Use those and check your plugs against those picts. Here is one site that has good picts and description: http://www.gnttype.org/techarea/engine/plugs.html Make sure to see and "read" all six plugs as any oil seepage may only be happening on one or two cylinders. If your plugs do show oil residue, take it in to the dealer. If you have warranty I'd do it sooner rather than later. If it's nothing, or they say it's nothing, then at least you'll have a record of it if something happens after the warranty. If they do find something, then you'll get it repaired. |
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04-19-2012, 09:25 PM | #108 | |
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If you intend to keep your car for a long time and put a lot of miles on it, then regular cleaning is no bad thing. ALL engines will have some carbon buildup over time, and most buildup happens early in an engines life. At 20K is a cleaning needed? I'd check the plugs first to see if everything is good. If I were keeping a 128i for the long haul I'd wait till around 50K, right before a spark plug change and do it then. If you are experiencing running problems then of course sooner is better than later. NA engines tend to run cleaner, internally, compared to turbo engines. Direct injection combined with boost seems to be getting more attention from carbon buildup. Do you get a good run time with your oil temp gauge showing nice and hot? 12-13 mile commute isn't that short given overall running time, which allows for heat build up. |
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04-19-2012, 09:37 PM | #109 | |
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Seafoam is a known product for that. Techron is more of an injector cleaner designed to be used mixed in to the gasoline. Techron is a high tech cleaner, but I'd like to see and read if anyone has actually run it straight into the combustion chamber via vacuum line. |
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04-19-2012, 09:41 PM | #110 | |
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The difference is how much build up and how long will it take. And, how much affect will it have on the running condition of the engine. The problem is greater with DI combined with forced air/increased chamber pressure. |
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