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10-07-2007, 01:18 PM | #1 | |
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Nasty experiences with the twin-turbo...
This from the Globe and Mail in Toronto:
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10-07-2007, 01:21 PM | #2 | |
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You can take it to the dealership and have one installed at no cost. Old news! Problem solved |
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10-07-2007, 01:50 PM | #4 | |
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Found this interesting comment by MIke Miller, BMW guru over at BMWCCA, suggesting the issue isn't fully resolved:
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10-07-2007, 03:22 PM | #6 | |
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And Garrett, the OP posted an article which mentioned the 2008 535i having the same problem. You like to think that this problem is gone, but it certainly isnt.
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10-07-2007, 04:10 PM | #7 |
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10-07-2007, 05:06 PM | #8 |
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Another reason to get 128i!
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10-07-2007, 09:24 PM | #9 |
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Yeah, you know what. The excessive heat of a turbo is just no good. Oh wait a minute, its got 2 turbos. Show me to the 128i.
However...the 128i does lack direct injection which is a concern. And I'm still concerned about long term galvanic corrosion issues in the 128i because of the unconventional aluminum/magnesuim engine block. anybody hear anything about that? |
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10-07-2007, 09:34 PM | #10 |
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Hadn't thought of that. Might be an issue on a long enough time line. Hopefully, a very long time line.
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10-08-2007, 04:04 AM | #11 | |
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Now it seems to be more prevalent with auto cars and the oil cooler(normally std on turbo platforms and im suprized it didn't come w/ one to begin with) obviously lowers temps. But there are cars w/ the retrofit that still limp home. There are ways of 'fixing' an overheating motor. 1. Lower the T-stat operating temp 2. Increase coolant flow/pressure 3. Use more water than coolant 4. Larger radiator 5. re-torque the heads 6. Increase airflow 7. Introduce a wetting agent to the coolant, ie: "water wetter" (Imo the greatest benefit of these products is that they raise the boiling temp of the water, reducing the possibility of hot spots) 8. etc. However this should not be necessary for a properly designed motor. I think it is worth mentioning that not all n54's 'overheat'(to me this says 'quality control') and the ecu doesn't let it actually overheat. .02 Zak |
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10-08-2007, 04:17 PM | #14 |
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Guys,
The problem isn't the coolant temperature, it's the temperaure of the oil that's getting super heated by the turbos. Water wetter, adding a higher ratio of water, etc. isn't going to help the situation. This is why an OIL cooler is essential on any turbocharged engine, no matter how efficient it may seem. |
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10-09-2007, 01:35 AM | #18 |
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Reminds me of my 69 Austin Healey. LOL
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10-09-2007, 08:02 AM | #19 | |
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Listen, All turbocharged engines run hot without the use of an oil cooler. How many turbo charged engines don't have an oil cooler..? Secondly, a lead engineer from BMW has said the N54 runs hotter than most engines, he stressed this was somehow related to BMWefficiencydynamics. Thirdly, I have not heard of a 335i/535i WITH an oil cooler overheating. Have you..? Suggesting that the oil cooler is covering up the fact that the engine runs hot, is like saying that a radiator hides the same fact. BMW is so confident in it's engine building they decided to sell certain biturbocharged cars without an Oil Cooler. Why..? Nobody knows, but the simple fact of the matter is that there ARE 335i's with no oil cooler that don't overheat. To me, thats remarkable. "The Problem" is that BMW is still selling cars without an oil cooler. The good news is that the car itself won't be harmed because it will protect itself and go into limp mode if it reaches 302 degree. In which you can then take it to the dealer and get your free oil cooler installed! This seems to be a concern of many people and I don't blame them. But when reality sets in, many have watched their oil read 280 all day long but never hit 290. Alot higher than normal and what we are use to, but then again, this isn't a normal engine and 280 degrees is normal for this engine. It's just scary because we are use to low 200's. Either way, even at it's severest level it is not our problem, but BMWs. -Garrett |
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10-09-2007, 08:26 AM | #20 | |
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i don't see anything fundamentally wrong with an engine running hotter than others as long as it was engineered to handle the higher operating point. |
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10-09-2007, 09:13 AM | #21 | |
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further I think you'll eventually see more changes to this situation by BWM. JMO but you'll see them put a performance, or efficient dynamics type of spin on what ever they do... rather than fixing a "problem" Regarding your quote above.... JMO but that's a way off base. Shouldn't the person that owns the car out of warranty have a reasonable expectation for a good ownership experience? If they don't... just watch what happens to future residuals.
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10-09-2007, 03:01 PM | #22 | |||||
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