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11-17-2013, 12:33 PM | #991 | ||
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11-17-2013, 12:45 PM | #992 | |
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If the rod change was to be responsible for so such a massive reduction in bearing surface wear then it contradicts the theory that high bearing wear is due to a tight bearing clearance...you can't have it both ways. Good luck with your engine build...sounds like fun. Last edited by SenorFunkyPants; 11-17-2013 at 02:00 PM.. |
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11-17-2013, 01:02 PM | #993 | |
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And what exactly do you think BMW is going to say to guy#2... "what is it you say...there is someone on the internet who says BMW don't know crap about engines? Why didn't you say that sooner, have this new engine free on us" BMW couldn't care less about some theory on the internet no matter how well it is dressed up. |
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11-17-2013, 01:54 PM | #994 | |
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It is a bit rich that pictures of piston crowns posted to demonstrate that no detonation was occurring then require some contortions to try and explain the clear evidence of poor combustion and micro pitting. Last edited by SenorFunkyPants; 11-17-2013 at 02:04 PM.. |
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11-17-2013, 02:43 PM | #995 | |
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So when you buy for your car at the dealership, you're not just paying for parts/labor/profit, but also a certain amount to cover the likelyhood of your car or someone else's to have parts fail during the warranty period. Car manufacturers are 'big-business' just like any company and if a certain failure rate, even for an expensive motor that is within their 'cushion' of acceptability, they won't even blink despite a known issue causing problems for the second-hand market or cars outside of the warranty period. Once it's beyond their liability, it's not their problem. 0.02 |
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11-17-2013, 02:54 PM | #996 | ||
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11-17-2013, 03:00 PM | #997 | |
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Fair do's, but those links refer to regular BMW engines, not S derivatives which are made to higher standards. The second link is to warranty direct who are a major BMW warranty supplier in the UK. It's in their interest to do a bit of scaremongering. The list is for engine related problems in general, not total failures. |
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11-17-2013, 03:21 PM | #998 | |
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11-17-2013, 04:24 PM | #999 | |
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Quick question though...taking the picture of piston #8 - are the indents on the right of the crown (by the arrow) for the intake valves? Thanks |
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11-17-2013, 05:11 PM | #1000 | |
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Not quite. That is precisely why in many previous posts I have constructed rough/order of magnitude/"bracketing" estimates and that number was 0.5%.
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11-17-2013, 05:18 PM | #1001 |
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The increased load is obviously only from the peak combustion cylinder pressure load increase and then only if the load is higher from combustion load than inertial loads. Again at low rpms combustion loads are smaller, inertial loads low but at high rpms inertial loads grow roughly as the square of the rpm. I don't think combustion loads grow at all that fast. Thus low rpm loads dominated by combustion and high rpm loads dominated by inertia.
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11-17-2013, 05:38 PM | #1002 | |
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What did your research tell you about the cause and solution to the wear shown in that photo. BTW, there should be at least two or three more bearings that look just like it. |
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11-17-2013, 05:47 PM | #1003 | |
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Crank-1 has already been documented in this thread as S65, ~30000 Miles, Bone Stock, 2008. Crank-2 specs are as follows: S65, ~11000 Miles, Bone Stock, 2008. |
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11-17-2013, 06:03 PM | #1004 |
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Why don't people in the US initiate a class action lawsuit? BMW are denying it's a known issue. The US is about the only country with the market size and capacity to sort this issue out.
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11-17-2013, 07:23 PM | #1005 |
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Very good and a timely point.
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11-17-2013, 08:09 PM | #1006 | ||||||
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You've given me an idea however. Until now, I never thought of rating them based on how many inclusions and how deep they are. I'll see if I can come up with a more objective scheme. Some of the bearings might switch places if I do (not these however). If I do the objective rating scheme, I'll be sure to post the methodology so others can chime in with their opinions. Quote:
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One respondent in a previous thread from AU mentioned that BMW-AU acknowledged "some type of problem" as it relates to these bearing failures, but wouldn't tell the guy anything more than that. If a customer was in that situation with a blown motor right after warranty, the poster said BMW was prepared to grant a good will gesture. Even if you didn't know the details I just laid out, I'm pretty sure you knew I was asking an ethics question. It very similar if I asked you if your motor blew and you planned to eat the cost of it knowing you had a tune. Or would you try to hide the tune, return the tune back to stock, then ask BMW for a warranty. Both are very fair questions. I personally think most would try to get the free motor than stand on their ideals and ethics and eat the cost. |
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11-17-2013, 08:37 PM | #1007 | |
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BMW Australia has been extremely good with their goodwill and they have looked after customers well after the warranty has expired. That's why I am relaxed about this issue.
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11-17-2013, 08:40 PM | #1008 | |
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Or, if your engine fails and you print this information, sit down with BMW and logically review the data with them, don't you agree that there is a higher probability of a favorable outcome than if you did nothing? Especially, if there is a known potential flaw in the engine that they are hiding. Something is causing these engines to fail, that is not theory. Don't get me wrong if your driving your car low on oil, supercharging, putting crap gas in it then its your fault you got nothing to stand on. Last edited by Cool Steel; 11-17-2013 at 09:19 PM.. |
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11-17-2013, 08:57 PM | #1009 | |
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11-17-2013, 09:02 PM | #1010 | |
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"BMW came seventh from bottom" If this statement does not open your eyes to the possibility of BMW creating a design flaw than you can google "BMW engine failures" and find different ones...there were many more. Here is another one...Remember, this information is to open every ones eyes to the fact that BMW is not perfect. So that everyone can accept the research that regularguy did as a possibility and not doubt it simply because you don't want to believe that BMW would do this. Logically, if they make mistakes in other cars they build, why would you think they couldn't possibly make a mistake in the S65 ? http://members.roadfly.com/jason/m3engines.htm Last edited by Cool Steel; 11-17-2013 at 09:18 PM.. |
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11-17-2013, 09:04 PM | #1011 |
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I've brought it up several times now. I guess we'll have to wait and see if my bearings outlast my factory warranty.
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11-17-2013, 09:27 PM | #1012 |
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Isn't some kind of a petition a more plausible solution? A lawsuit is to negative an action. A petition signed by many and presented to BMW to do research into this issue is something we should do. Our concern would be documented, and if ignored can be used against them if needed in the future that they did nothing.
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