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03-03-2014, 12:58 AM | #2047 | |
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03-03-2014, 05:13 AM | #2048 |
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No idea where you are getting this. There certainly are standards as to ratio of clearance size to journal size. The older S65 bearings are slightly tighter than this spec (without the extra 0.0005") and the newer bearings are within the spec (using the smaller spec of 0.00075 in/in and even counting the extra 0.0005). I'm also don't believe you've asked me many times for counter examples to this standard.
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03-03-2014, 05:25 AM | #2049 |
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03-03-2014, 05:34 AM | #2050 | |
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If the wear we've observed in some of these cases is at all typical across most engines, it means that the rate is likely to increase significantly as more and more cars get up into higher mileage and beyond 100k mi. Perhaps stated more clearly this might only be an issue with intermediate and high mileage cars as opposed to many other cars which can have bearings that look new after 300k mi.
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03-03-2014, 05:49 AM | #2051 |
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Really? Clearances and oils will vary by year make and model. You wouldn't happen to be making and gross generalization here would you? And again, my just prior comments about BMW clearances: The new bearings are "proper" by standard best practices and the older ones just slightly out of this spec. Lastly, how many of these failures do you think have nothing to do with true internals? I'd bet a bunch are simply oil and water pump failures and gaskets failures that led to much worse things...
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03-03-2014, 06:09 AM | #2052 | |
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But no matter how you look at it, older BMWs are not a car I would want to own without a (BMW) warranty. |
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03-03-2014, 08:11 AM | #2053 | |
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But no matter, the high order bit in my post was that when looking at industry data, there is no reason to be alarmed by the M3/S65 numbers. |
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03-03-2014, 08:48 AM | #2054 |
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Quite a while ago BMW UK cottoned onto the fact that a cheap 3 series would fit into the price category for company cars and they sold them by the shedload.
These were cars that were hacked up and down the country doing high mileage and at the end of the lease they would go to auction. Hondas on the other hand are more likely bought by older citizens doing low mileage. Not that it really matters but it does explain in part why the Honda numbers are so good. What you really need are the figures from the companies managing the warranties for the big dealer networks but I suspect they will be far less forthcoming about failure rates. I bet that most big car companies would be more than happy with a sub 1% failure rate at 100,000 miles. |
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03-03-2014, 09:51 AM | #2055 | |
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03-03-2014, 01:08 PM | #2056 | |
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You gotta love the power of the Internet - one minute you are asking on M5board "Hello does anyone have changed the Bearing rods On the v10 ?" (looking for a DIY guide) and the next you are an expert and apparently M5 owners are flocking to you from all over Germany to fix their cars. |
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03-03-2014, 01:13 PM | #2057 | |
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03-03-2014, 01:15 PM | #2058 | |
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They may not be very exciting cars but I will say nothing beats Japanese reliability for a car. I always see 20+ year old Japanese cars which look and run like new with over 200k-300k miles.
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03-03-2014, 01:44 PM | #2059 | |
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03-03-2014, 02:52 PM | #2060 | |
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You: Post-403, Post-581, Post-590, Post-821, Post-891, Post-948, Post-1491, Post-1745, Post-1746 Then I searched how many times I mentioned "best practice" and I pulled out the ones I thought seemed most relevant. It's true that some of these aren't responding directly to you, but one of them is -- and it's very clearly asking you to google the results for yourself if you're still unconvinced these clearance ratios are industry best practice. So clearly there's some established history between us on this topic. Me: Post-529, Post-584, Post-765, Post-1772 |
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03-03-2014, 02:52 PM | #2061 |
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03-03-2014, 03:25 PM | #2062 |
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Yeah who nows..we should go for it !
Anyway, i know and felt you had an angry feeling about the Octane and i think that sometimes the bearings are like a hard carrying load especially for a man like you that wants to find a solution for all of us ! Therefore i can only have enormous respect and this for a man like you ! And that's why i wanted to say ...thank you man ! BTW...i asked you this yesterday and think you have missed it... about the video on this page and what do you think about it ? >http://www.m3post.com/forums/showthr...9#post15529269
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03-03-2014, 03:50 PM | #2063 | |
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03-03-2014, 07:39 PM | #2064 |
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Related question: Can you trust plastigauge with clearances this tight? Basically, if you do replace your bearings, will it guarantee you aren't worse off than you were before?
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03-03-2014, 08:22 PM | #2065 |
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Plastigage works but a better process would be to measure the shell thickness with a ball mic and over all shell height. The height will give you a comparison for crush numbers and shell thickness will give good back and forth to the old shells as far as clearance goes.
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03-03-2014, 09:21 PM | #2066 | |
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03-03-2014, 09:28 PM | #2067 | |
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You might try to isolate the location. Front/rear, top/bottom, left/right. But whatever it is...I'm sure it's caused by high octane gas. |
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03-04-2014, 09:13 AM | #2068 | |
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Today i took a picture and especially for you....98 Ron Octane !
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